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JAKOBAntriebstechnik

Servocouplings

1 www.jakobantriebstechnik.de Tel. 06022 2208-0 Fax 06022 220822

Servo couplings

General...........................................................

Dimensioning..................................................

Formulas ........................................................

Installation instructions...................................

Metal bellows couplings

Technical........................................................

KM..................................................................

KP...................................................................

KPS................................................................

KR..................................................................

KSD................................................................

KSS................................................................

KLC................................................................

KXL ................................................................

Special series.................................................

Elastomer couplings

General...........................................................

Selection procedure .......................................

Installation instructions...................................

EKM................................................................

ESM / ESM-A.................................................

EKS................................................................

Special series.................................................

Miniature couplings

MKM...............................................................

MKP................................................................

MKA................................................................

MJT / MJT-C...................................................

MOS ...............................................................

MOL................................................................

Distance couplings

General...........................................................

Assembling.....................................................

KLH................................................................

EKZ................................................................

WBA...............................................................

WBS...............................................................

Diagrams - WB...............................................

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6

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13

14

15

16 / 17 / 18

19

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27

28

29

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31

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Serv

o c

ou

plin

gs

Servo couplings General

Servocouplings

2www.jakobantriebstechnik.de Tel. 06022 2208-0 Fax 06022 220822

For decades, the centre of the

JAKOB coupling program has

been a big variety of different

metal bellow couplings.

Definition - servo couplings:

Servo couplings are compensating couplings with a backlash free and conformal torque transfer providing high

torsional stiffness and a low moment of inertia. According to these requirements, JAKOB metal bellow couplings

can be regarded as the ideal solution. For more than 25 years, they have proven themselves in thousands of

servo drives as being excellent. Elastomer couplings with a flexible polyurethan-spider can also represent a per-

fect alternative for different applications because of their product-specific advantages. All JAKOB servo couplings

have one thing in common, they are all backlash free (also shaft-hub-connection) and flexible to allow the com-

pensation of shaft misalignments. Because of the unique characteristics of the different series, the designer will

(almost) always find the best solution within the large-scale JAKOB coupling program. The area of application

ranges from highly dynamic feed drives of the axis in machine tools to high performance drives in the

general machine tool design.

Characteristics - JAKOB servo couplings:

• absolut backlash free, exact torque transfer

• low moment of inertia - high balancing quality

• excellent operational characteristics - high speed

• compensation of shaft misalignments - low restoring forces

• frictional, easy to fit shaft-hub-connection

• metal bellow: max. torsional rigidity, wear free, up to 300°C

• elastomer spider: plug-in, oscillation dampening, up to 120°C

• compact - flexible areas of applications

• large number of types and sizes available (modular system)

• precise production - best quality - long life time

The JAKOB modular system:

As flexible compensating parts, stainless steel bellows are used in different forms as well as polyurethan spiders

with different shore hardnesses, oldham- type spacer as polyacetal and stainless steel membran hubs. Another

important aspect is the kind of connection between the driven shafts resp. primary shafts and the coupling hubs.

Several versions of backlash free frictional clamping hubs or conical hubs are available.

In the following, the most important and widely used series of compensating elements and kinds of hubs,

deriving from the numerous possibilities of combinations, are described in this catalogue. A well-contrived modu-

lar system, which provides multiple use of many parts, enables a production in cost-effective batch sizes and

very short delivery times.

The JAKOB coupling program is devided into the following four main groups:

• Metal bellow couplings

• Elastomer couplings

• Miniature couplings

• Distance couplings

with intermediate pipe

Servo couplings Dimensioning

Servocouplings


Technical information - definitions / details:

• Nominal torque of the coupling: TKN - [ Nm ]

The nominal torque of the coupling defines the max. load of the prolonged alternating-stress strength. If in

normal operation TKN is not exceeded, an infinite number of operation cycles can be carried out (see "useful

life of the coupling").

• Moment of inertia: JK - [ 10-3

kgm2

]

The values for the moment of inertia are defined for medium hub- bores in the given diameter range

Dmin/Dmax. Conversion: [ kgcm2 ] = [10-4kgm2 ]

• Torsional rigidity: CTK - [ Nm / arcmin ]

The values for the specific torsional rigidity of all couplings and gear series are conversed from the existing

values [103 Nm/rad] to "Newtonmeter per angular minute". This enables the constructor to determine the

twisting angle failure quite easily (see "b" below) under consideration of the operating torque. 60 angular

minutes (resp. arc minutes) correspond to one angular degree.

This defines the conversion factor 1 rad = 57,3° = 3438 arcmin.

Conversion: [103Nm/rad = 0,291 Nm/arcmin] resp. [1Nm/arcmin = 3438 Nm/rad]

Example: Size KM 170: 17,5 Nm/arcmin= 60 kNm/rad

• Max. alignment of shafts: [ mm ]

The maximum alignment of shafts is the largest allowed misalignment between drive shaft and output shaft,

which results from the calculation of the prolonged alternating-stress strength for compensating elements. If

the allowed displacement values are not exceeded, an infinite number of load alternations can be carried out.

In exceptional cases (e.g. during fixing) resp. at reduced numbers of load alternations, the displacement

values may be considerably higher (please further consultation).

- axial displacement: usually without problems (expansion due to temperature)

- angular displacement: usually without problems - allowed max. value: 1 to 2 degrees

- lateral or parallel displacement: If the admissible values are considerably exceeded, permanent

distortion at the bellows resp. higher wear of the elastomer spider

can occur. Special care during fitting must be taken!

• Spring rigidity - axial / lateral: [ N / mm ]

Restoring forces of the metal bellow resp. of the elastomer spider, resulting of the misalignments.

Dimensioning of the coupling

a) according to torque:

Usually the size of the coupling is chosen according to the torque. For exact determination of the necessary

driving torque, difficult calculations are neccessary (see formularies). If the size of the motor is fixed, the

necessary nominal torque of the coupling can be calculated as follows:

TAmax = peak torque of the motor

i = transmission resp. reduction of the toothed belt drive resp. the spur- toothed

wheel

b) according to the torsional rigidity:

For applications with very precise requirements (position control, transmitter), transfer errors due to high elastic

deformation can be an importand criteria of selection of the coupling. The torsional angle “αT” is calculated as

follows:

αT = TA

[arc minutes] with TA= driving torque [Nm] / CTK= torsional rigidity of the coupling [Nm/arcmin]CTK

In very few cases, metal bellow couplings can have resonance sounds (e.g. a whistling or a humming). Then

coupling types with a higher torsional rigidity or vibration reducing elastomer couplings are recommended.

^

^

^

TKN > 1,25 x TA max x i_

^

^

Servo couplings Dimensioning

Servocouplings


c) according to the shaft diameter:

After selecting the coupling type, it must be checked whether the requested shaft diameter corresponds with

the allowed diameter (Dmin / Dmax) of the hub bores. Another coupling type or size must be chosen, if the

shaft diameter is overdimensioned in relation to the torque, which means it is larger than Dmax of the hub.

Note: Hub bores which are smaller than “Dmin”. are possible; but an optimal transfer of the nominal torque

can not be guaranteed in this case, so a reduction of TKM is necessary.

d) Useful life of the coupling - durability:

The durability of JAKOB compensating couplings is basically

determined by the peak torque and the existing shaft

displacement or misalignment. If the admissible maximum

values for the axial, lateral and angular displacement are

not exceeded, and if the operating torque at the same time

is below the coupling nominal torque TKN, then the coupling

is within the range of prolonged alternating-stress strength

limit. An infinite number of start - stop - cycles or

acceleration and deceleration can be carried out without

having to expect a break - down of the coupling during

operation.

e) Max. load:

In special cases, the couplings (metal bellow, membrane, elastomer spider) can be overloaded for a short time

with twice the nominal torque (2 x TKN). The hub-bore-connection, however, must be calculated

seperately then.

f) Bearing loads:

Due to the flexibility of the compensating couplings in all

directions, considerable bearing loads are prevented, in

spite of possible axial, lateral or angular displacement from

the drive shaft to the output shaft. Therefore, an early

breakdown or higher wear of the rolling bearing can be

prevented. This means less difficult and expensive repairing.

g) Operating temperatures:

Metal bellow and membrane couplings are, as whole metal couplings, extremely insensitive to temperature

and can be used at temperatures up to 300° C without limitation. The temperature limit of the elastomer

spider is at 90° C (98 Sh-A) resp. 120° C (72 Sh-D). At high operating temperatures, an appropriate

correction factor needs to be applied.

h) Speeds:

Due to precision machining and the rotation symmetrical design resp. the additional balance pin, the

compensating couplings are generally suitable for high speeds up to 20,000 min-1 even without additional

balancing. The standard balancing quality are approx. Q 6.3 to Q 16. Couplings with conical hubs or hubs

with tapered ring can be operated with speeds over 25,000 min-1 (please further consultation). The low

moment of inertia also has a positive effect.

i) Maintenance and wear:

Compensation couplings are maintenance and wear free under normal conditions. The polyurethan spiders

of the elastomer couplings should be changed in suitable periods, if critical operation parameters are given.

permanentdistortion

endurance strength(endurance failure)

torq

ue

load change cycles

prolonged alternating-stress strength2 107

T

T

max

KN

Fatigue lifeof coupling

lateral

axial

angular

Misalignment

Servo couplings Formulas - drive technology

Servocouplings


Note: If the driving axis is constructed

without gear resp. toothed beltdrive

> iG = 1

1 Rate of feed V:

V = PSP · nSP [ m / min ]

PSP = spindle pitch - BS [ m ]nSP = spindle speed - BS [ min -1 ]

2 Neccesarry max. motor speed n :

nM nec. =Vrap · iG

[ min-1 ]PSP

Vrap = rapid feed - slide [ m / min ]iG = transmission gear / toothed beltdrive

3 Basic figure - ball screw:

DSP · nSP < 100.000 - control figure_

DSP = spindle diameter - BS

The dimensioning of the spindle is made seperately according to the specificationsresp. nomograms of the manufacturer.

4 Necesarry engine torque - stationary T :

TMnec. =Fx · PSP < TMo [ Nm ]2 π · ηSP · ηG · iG

_

FX = axial force slide (see 5) [ N ]

ηSP = efficiency - spindle 0,9

ηG = efficiency - Gear 0,90 - 0,95

TMo = moment - motor for continous operation

5 Axial force - slide (stationary) FX:

FX = FC + FF [ N ]

FC = cutting force resp. feed [ N ]FF = friction force - saddle slideway (see 6) [ N ]

6 Friction force - saddle slideway FF:

FF = µS · g · (mS + mW) [ N ]

µ S = friction of saddle slideway / g = 9,81 m / s² mS = mass of slide [kg]mW = load mass - workpiece [kg]

7 Acceleration torque - motor T :

TMa = Jsub · αM ± TF < TMmax [ Nm ]

Jsub = substitute moment of inertia [ kgm² ]

= total moment of inertia, reduced to

motor shaft ( see 9 )

αM = angular acceleration - motor (see 8) [s-2]

TF = friction moment slide [Nm] (see 10)

TMmax = max. engine torque [Nm]

8 Angular acceleration motor α :

αM =2π · n M

[ s-2 ] tH = max. tzultH

αM =2π · aS

[ s-2 ]PSP

tH = run-up time - motor (see 11) [m/s]aS = axial acceleration - slide [m/s]nM = speed regulation n2 - n1

if n1 = 0 > nM = max. nMnec.

9 Total moment of inertia J :

Jsub=JM +JG+JC +JSP

+mS + mW ·(PSP )²

iG² iG² iG² 2 π

JM = moment of inertia - motor (according to manufacturer) [kgm²]

JG = moment of inertia - gear [kgm²](acc. to manufacturer, resp. with toothed beltdrive the

pulley at spindle-side must be reduced to the motor shaft)

JC = moment of inertia - coupling (acc. to the manufacturer)[kgm²]

JSP = moment of inertia - spindle (acc. to the manufacturer) [kgm²]

10 Friction moment - slide (reduced to motor shaft)T :

TF =FF · PSP

2π · ηSP · ηG · iG [Nm] ( FR from 6.)

11 Run- up time - drive (motor):

tH =Jsub. · nM < tmax [ms] = [10-3 s]9550 · TMa

_

~tmax - acc to manufacturer - motor (~300ms)- for exact determination of tH, a motion

diagram might be necessary.

12 Estiminated calculation - coupling torque T :

TM = 9550 ·PM

[Nm]nM

PM = motor power [ kW ]

nM = motor speed [ min-1 ]

servo motor planetary gearbox servo coupling slide workpice

ball screw

typical construction

-feed drive-

machine tool

M nec.

M nec.

sub

M

[kgm²]

F

M

Ma

- BS

Servo couplings Installation instructions Alignment of shafts:

Axial and angle displacement are usually without problems

and also simple to measure. To obtain the lateral

displacement it is recommended to proceed as follows:

Fit a dial gauge with a appropriate holding device on one

shaft end or on the one hub of the coupling and bring it with

the stylus onto the second shaft end or onto the second

coupling half (sketch). Now the shafts are turned with the

dial gauge and the deflection is read off. One half of the

total deflection is the lateral misalignment. The admissible

value for the shaft displacements must be taken from the

technical data sheets of the appropriate series.

Servocouplings


80

5060

20

10 90

7030

40

0

12

3

4567

89 0

Shaft - hub connection

The couplings are supplied with finished bores as a rule,

in exceptional cases they are also supplied prebored.

The seat shaft / hub is to be selected as a transitional

seat (example: hub bore diameter 28 G6 - shaft

diameter 28 k6).

Prior to mounting the finished bore shaft and conical

sleeve should be lightly oiled to prevent fretting

corrosion. The coupling is then ready for assembly

between the two shafts. An existing keyway in the

shaft will not affect the frictional connection.

(see EASY-clamp-sytem page 8)

a) Radial clamping hub

Admissible seat clearance shaft hub: min. 0,01 mm

max. 0,04 mm

Very simple fitting by tightening only one radially

arranged clamping screw (DIN 912).

The value for the relevant tightening torques can be

found in the data sheets. One hole in the housing is

sufficient, as a rule, to tightening the clamping screw.

(see EASY-clamp-sytem page 8)

c) Conical hub/conical ring hub

Admissible seat clearance shaft - hub: max. 0,02mm

Assembly of the conical bush or of the conical clamping

ring with several, concentrically arranged mounting

screws (as a rule 6x DIN 933).

One side of the coupling is fitted onto the shaft end by

evenly tightening the screws, crosswise (to prevent

uneven draw-on).

The drive or output is now turned by a few revolutions,

so that the shaft pinion turns in the second hub and the

hub can move on the shaft for axial release. Now the

6 screws of the second hub are also evenly tightened.

b) Splithub

Admissible seat clearance shaft - hub: min. 0,01mm

max. 0,04mm

Two radial clamping screws (DIN 912) are arranged

mirrored. The hubs or couplings are split and consist of

2 loose halves.

One of the splitting hubs can be put onto the aligned

shaft. Tighten clamping screws evenly, alternating

between both sides (note specified tightening torques).

A larger opening must be provided in the housing for

easy installations.

Disassembly

After releasing the 12 (6) retaining screws, the hubs

are released with 3 push-off threads each.With axially

tight space conditions, it is advisable to screw in and

secure the push-off-screws before fitting. For disas-

sembly an opening in the housing should be provided.

Special notes

Metal bellows coupling:

As the metal bellows consist of thin stainless steel

sheeting, special care during fitting and disassembly

is neccesarry. Damages to the bellows can render the

coupling useless.

Elastomer couplings:

Due to the plugability a blind fitting is also possible.

Oil the elastomer spiders lightly before fitting.

You will find further type specific technical details and characteristics in the data sheets.

Metal bellows - Servocouplings Technical

Servocouplings


4 The Radial Clamping HubAdvantages:

- Easy single bolt mounting for shaft-hub connection

- Zero backlash torque transmission is guaranteed

- Low moment of inertia and light weight

- Quick Delivery

- Keyways available upon request ( for an addittional

cost )

Nickel Plated Socket

Head Cap Screw Q10.9

5 The EASY - Clamp System Advantages:

- The newestand best engineered technology for mounting couplings

- Eliminates possibility of damaging couplingduring installation or deinstallation

- Quicker installation

- Tolerance differences between shaft and coupling will be compensated

- No additional tools needed for installation

- Easier to uninstall

By loosening the socket head cap screw

against the pin, the clamping hub is easily

expandet for assembly or dis-assembly.

The zero backlash clamping hub

is connected to the shaft while

providing a high clamping force.

Patented

EASY - Clamp - System

conicalclamping hub

conicalring hub

expandingcone hub

Advantages:

- Through force amplifying (wedge principal) a

safe transmission of the torque although for

smaller bore sizes (hub additionally sliced) is

guaranteed.

- Backlash- and maintenance- free, actuated by

adherence without keyway

- Rotary symetric, good balancing

- Expanding cone hub for axial mountening

in a hollow shaft

6 The conical connection

Metal bellows coupling Series KM

• 6-corrugation bellows

• simple installation, with EASY - clamping hub

• cost- effective standard series

Technical data:

Dimensions: (mm) length dimensions according to DIN ISO 2768 cH

Ordering example: KM 170 - D1 = 30 G7 D2 = 35 H6

Ø D

1

Ø D

2

Ø a

l

hf-DIN 912

c

g

Material:

- bellows: stainless steel

- hubs: high tensile strength aluminium

- screws: DIN 912 - nickel plated

Servocouplings


KM TNmoment torsional max.shaft axial lateral mass tightening torqueof inertia stiffness displacement (mm) spring rate spring rate approx. of screws

Size [Nm] [10-3kgm2] [Nm/arcmin] axial± lateral [N/mm] [N/mm] [kg] [Nm]

smaller couplings from 0,4 - 12 Nm see Series MKM (page 27)

20 20 0,14 5,2 0,8 0,25 51 190 0,3 14

35 35 0,14 5,8 0,8 0,25 51 190 0,3 14

60 60 0,29 8,7 0,9 0,3 49 260 0,5 34

80 80 0,79 14,0 1 0,3 45 280 0,8 65

170 170 0,83 17,5 1 0,3 80 470 0,8 65

270 270 2,2 32,3 1 0,3 70 450 1,4 115

400 400 2,4 47,1 1 0,3 100 640 1,5 115

550 550 4,6 66,9 1 0,3 100 980 2,1 115

900 900 9 98,9 1 0,3 145 1000 3,3 200

1300 1300 14 154 1 0,3 130 920 4,2 290

KM Ø a c f g h l ØD1/2min ØD1/2max

20 56 19 M 6 30 7,5 70 9 30

35 56 19 M 6 30 7,5 70 14 30

60 66 22 M 8 33 8,5 77 18 34

80 82 28,5 M 10 38 10,5 90 17 43

170 82 28,5 M 10 40 10,5 92 22 43

270 101 35 M 12 42 12 100 27 55

400 101 35 M 12 48 12 106 34 55

550 122 45,5 M 12 52 12,5 112 38 75

900 133 47 M 14 53 18,5 143 40 75

1300 157 54 M 16 55 19 145 60 85

Material:




KP TNmoment torsional max. shaft axial lateral mass tightening torqueof inertia stiffness displacement (mm) spring rate spring rate approx. of screws

Size [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm]

smaller couplings from 2 - 12 Nm see Series MKP (page 28)

20 20 0,13 9 0,5 0,2 70 480 0,3 14

35 35 0,13 9 0,5 0,2 70 480 0,3 14

60 60 0,27 14 0,6 0,2 70 650 0,4 30

100 100 0,35 20 0,6 0,2 118 1200 0,5 35

170 170 0,76 28 0,8 0,2 98 1000 0,8 65

270 270 2 52 0,8 0,2 94 1350 1,3 115

400 400 2,15 74 0,7 0,2 135 1500 1,4 115

550 550 4,2 106 0,7 0,2 145 3000 2,0 115

Technical Data:

KP Ø a c f g h l ØD1/2min ØD1/2max

20 56 19 M 6 21 7,5 61 9 30

35 56 19 M 6 21 7,5 61 14 30

60 66 22 M 8 23 8,5 67 18 34

100 71 25 M 8 23 8,5 68 22 38

170 82 28,5 M 10 28 10,5 80 22 43

270 101 35 M 12 29 12 87 27 55

400 101 35 M 12 33 12 91 34 55

550 122 45,5 M 12 36 12,5 96 38 75


Ordering example: KP 170 - D1 = 43 H7 D2 = 40 G7

Ø D

1

Ø D

2

Ø a

l

h

c

f-DIN 912g

Metal bellows coupling Series KP

• 4 -corrogation bellows

• high torsional stiffness - short design

• simple installation, with radial EASY - clamping hub

Servocouplings


Metal bellows coupling Series KPS

Material:



- expanding cone: heat trated steel

- screws: DIN 912 nickel plated

• 4 -corrogation bellows


• for direct mounting in a hollow shaft

• internal axial buffer

KPS TNmoment torsional max. shaft axial lateral mass tightening torqueof inertia stiffness displacement (mm) spring rate spring rate approx. of screws (Nm)

Size [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] “ i ” “ f “

2 2 0,01 0,4 0,25 0,1 32 100 0,03 4 2

8 8 0,02 1,9 0,5 0,15 20 90 0,1 8 8

20 20 0,13 7 0,5 0,2 70 480 0,3 14 14

60 60 0,28 13 0,6 0,2 70 650 0,4 30 30

170 170 0,94 27 0,8 0,2 100 1000 0,8 65 65

400 400 1,95 64 0,7 0,2 135 1500 1,4 100 115

550 550 3,9 96 0,7 0,2 145 3000 2,0 115 115

Technical data:

KPS Ø a Ø b c e f h i l tmin tmaxØD1 ØD2 g6

min max min max

2 24,5 (27,5) 22 7,5 10 M 3 4,5 M 3 38 12 20 3 10 (14) 8 12

8 39,5 (44,5) 35 13 20 M 5 6 M 5 61 15,5 33 6 19 (21) 13 18

20 56 51 19 25 M 6 7,5 M 6 73 19 38 9 30 15 20

60 66 61 22 26 M 8 8,5 M 8 78 21 40 18 34 20 28

170 82 77 28,5 30 M 10 10,5 M 10 92 25 48 22 43 25 32

400 101 95 35 32 M 12 12 M 12 102 28 56 34 55 30 38

550 122 110 45,5 42 M 12 12,5 M 12 116 29 62 38 75 35 48


Ordering example: KPS 20 - D1 = 15 H7 - D2 = 20 g6

Ø D

1

l

t

h

e

Ø b

Ø D

2 g

6

Ø a

c

f-DIN 912

i - DIN 912

Notice: The associated bore size for the expanding cone >>ØD2<< with tolerance H7.

Sizes KPS 2 and KPS 8 without EASY-Clamp.

Application example:

Integrated design

of a KPS coupling

Servocouplings


Material:




TNmoment torsional max. shaft axial lateral mass tightening torque

KR of inertia stiffness displacement (mm) spring rate spring rate approx. of screwsSize [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm]

25 25 0,12 8 0,3 0,2 150 150 0,3 14

50 50 0,12 9 0,3 0,2 160 170 0,3 14

65 65 0,25 11 0,3 0,2 90 85 0,4 34

100 100 0,7 22 0,45 0,4 125 110 0,75 50

200 200 0,84 34 0,3 0,2 350 200 0,8 67

300 300 2 45 0,4 0,3 210 160 1,3 115

450 450 2,15 66 0,3 0,2 300 240 1,4 115

540 540 4 98 0,5 0,3 300 360 2 115

Technical data:

Øa c f g h l ØD1/2min ØD1/2max

25 56 19 M 6 33 7,5 73 14 30

50 56 19 M 6 33 7,5 73 20 30

65 66 22 M 8 41 8,5 85 18 34

100 82 28,5 M 10 50 10,5 102 16 43

200 82 28,5 M 10 56 10,5 108 22 43

300 101 35 M 12 65 12 123 30 55

450 101 35 M 12 65 12 123 45 55

540 122 45,5 M 12 72 12,5 132 38 75


KR

Ordering example: KR 100 - D1 = 35 G7 D2 = 35 G7

Ø D

1

h

l

c

f-DIN 912

Ø a

Ø D

2

g

Metal bellows coupling Series KR

• straight bellows - long design


• low restoring forces - high torsional rigdity

Servocouplings


Material:


- hubs: heat - treated steel


TNmoment torsional max.shaft axiale lateral mass tightening torque

KSD of inertia stiffness displacement (mm) spring rate spring rate approx. of screwsSize [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm]

20 20 0,1 5,5 0,8 0,25 51 190 0,4 4

35 35 0,1 6,1 0,8 0,25 51 190 0,4 4

60 60 0,3 9,0 0,9 0,3 49 260 0,8 14

80 80 0,9 14,3 1 0,3 48 220 1,3 14

170 170 0,9 18,0 1 0,3 80 400 1,3 14

270 270 2,5 32,8 1 0,3 70 450 2,4 34

400 400 2,8 47,7 1 0,3 100 640 2,5 34

550 550 5,5 67,8 1 0,3 100 980 3,6 65

900 900 10 100 1 0,3 145 1000 5,5 65

1300 1300 20 157 1 0,3 130 920 7,7 115

Technical data:

Ø a Ø b Ø c e 6 x f g h lØ D 1/2 pre-

KSD min. max. bored

20 56 52 30 48 M 4 12 44 54 15 19 8

35 56 52 30 48 M 4 12 44 54 16 19 8

60 66 62 36 53 M 6 5 47 61 18 25 11

80 82 78 50 58 M 6 4 52 66 22 35 17

170 82 78 50 60 M 6 6 54 68 22 35 17

270 101 96 62 66 M 8 2 58 77 28 42 25

400 101 96 62 72 M 8 8 64 83 30 42 25

550 122 112 70 78 M 10 6 68 91 35 48 32

900 132 127 83 94 M 10 6 76 107 40 60 38

1300 157 140 98 96 M 12 6 78 111 40 70 38


Ordering example: KSD 270 - D1 = 42 G6 D2 = 30 H7

Ø D

1

Ø D

2

Ø c

Ø b

Ø a

h

e

l

g

Metal bellows coupling Series KSD• 6 - corrugation bellows - short design

• conical hub on both sides

• cost - effective standard series

Servocouplings


Material:


- hub: stainless steel


TNmoment torsional max.shaft axial lateral mass tightening torque

KSS of inertia stiffness displacement (mm) spring rate spring rate approx. of screws Size [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm]

25 25 0,1 8 0,3 0,3 150 150 0,4 4

50 50 0,1 9 0,3 0,3 160 170 0,4 4

65 65 0,3 11 0,3 0,4 90 85 0,7 14

100 100 0,75 22 0,45 0,4 125 110 1,2 14

200 200 0,84 34 0,3 0,4 350 200 1,25 14

300 300 2,3 45 0,4 0,4 210 160 2,2 34

450 450 2,4 66 0,3 0,4 300 240 2,3 34

540 540 4,8 98 0,5 0,5 300 360 3,4 67

850 850 18 136 0,7 0,5 200 230 7,5 115

1500 1500 19 247 0,6 0,5 520 480 7,7 115

Technical data:

Ø a Ø b Ø c e 6 x f g h lØ D 1/2 pre-

KSS min. max. bored

25 56 52 30 51 M 4 15 47 57 15 19 8

50 56 52 30 51 M 4 15 47 57 15 19 8

65 66 62 36 61 M 6 13 55 69 18 25 11

100 82 78 50 70 M 6 16 64 78 22 35 17

200 82 78 50 76 M 6 22 70 84 22 35 17

300 101 96 62 89 M 8 25 81 100 28 42 25

450 101 96 62 89 M 8 25 81 100 28 42 25

540 122 112 70 98 M 10 26 88 111 35 48 32

850 157 140 98 137 M 12 44 119 152 40 70 38

1500 157 140 98 137 M 12 44 119 152 40 70 38


Ordering example: KSS 450 - D1 = 28 H7 D2 = 35 F6

Ø D

1

Ø c

g

h

e

l

Ø D

2

Ø b

Ø a

f - DIN 933

Metal bellows coupling Series KSS

• straight bellows - long design

• conical bush on both sides

• low restoring forces - high torsional rigidity

Servocouplings


Metal bellows coupling Series KLC

• low cost - servo coupling for serial use

• backlash free torque transmission, simple installation

• wear and maintenance free

TNmoment torsional max. shaft mass tightening torque

KLC of inertia stiffness displacement [mm] approx. of screwsSize [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [kg] [Nm]

25 25 0,09 3,5 0,5 0,2 0,22 10

50 50 0,22 6,5 0,5 0,2 0,43 18

125 125 0,75 12 0,5 0,2 0,90 40

250 250 2,1 28 0,5 0,3 1,70 80

500 500 5,2 50 0,5 0,3 2,90 140

Technical data:

KLC Ø a b c f g h l ±1 ØD 1/2min ØD 1/2max

25 50 46 17,0 M 5 35 6,5 62,5 10 28

50 61 56 20,5 M 6 34 8 67 15 34

125 80 73 27 M 8 42 9,5 81 18 44

250 98 88 33 M 10 46 11,5 94 24 54

500 118 108 41 M 12 46 13 99 32 68


Ordering example: KLC 125 - D1 = 22 G7 D2 = 25 H7

Material:


- hubs: steel St 52 (alt. stainless steel)

- screws: DIN 912 Q12.9

Note - hub bore:

If couplings are ordererd in big numbers, the diameter

and tolerance zones of the hub bores ØD1 / ØD2 are

produced and delivered according to customer's requi-

rements. In special cases, the hubs can be prebored on

one or on both sides or can be equipped with an addi-

tional hub bush.

Note - special versions:

Alternatively, KLC-couplings can be delivered comple-

tely in stainless steel. Hereby hub material 1.4301 is

used as standard. Versions with longer metal bellows

or special hubs are possible if specially required by

customer.

Servocouplings


Notice: Connection between bellows and hub: plasma welding-process

alternative:

c

l

f - DIN912

D2

Ø

bØØ

a

g

D1

Ø

h

Metal bellows coupling Series KXL

Servocouplings


The metal bellows couplings of the series KXL are

constructed for medium- size to big drives of up to max.

38000 Nm. Although this type of coupling has proven itself

reliable for years, the series was completely reworked in

order to make it even more attractive regarding technical

parameters as well as the aspect of costs. It is very

special because of the three- parted construction with a

flexible intermediate piece (bellow). This intermediate

piece can be disassembled. It consists of an optimal

torsionally stiff stainless steel bellow with 2 bellow shafts

on each side and an intermediate pipe which is variable in

length. The connection with the two hubs is frictionally

engaged (screws acc. to DIN 933). Therefore, assembly is

much easier as, e.g. in case of inspection or service, the

heavy drive unit or the output unit need not to be disas-

sembled. The designer can chose between several hub

variations (see selection table).The very good moment of

inertia and the rotation symmetrical design ensure good

dynamic operation characteristics. KXL-couplings are

most suitable for precise drives, such as for printing machi-

nes, cross cutters, main spindle drives, transfer axis or

gearbox attachement.

• Hub type A - frictional, backlash free conical clamping ring connection, external

- free radial disassembly of the bellow part (see drawing on page 17)

• Hub type B - frictional, backlash free conical clamping ring connection, internal

- short, free radial disassembly of the bellow part is not possible

• Hub type C - with feather keyway DIN 6885 - Page 1 resp. DIN 6886, external

- free radial disassembly of the bellow part

• Hub type E - with feather keyway DIN 6885 - Page 1 resp. DIN 6886, internal

- free radial disassembly of the bellow part is not possible

• Hub type F - attached flange, center outside, acc. to ISO 9409, resp. customer's requirements

- radial disassembly possible (please further consultation), backlash free

• Hub type G - attached flange, center inside, acc. to ISO 9409, resp. customer's requirements

- radial disassembly possible (please further consultation), backlash free

Material:

Bellow: stainless steel

Flange: heat-treated steel - black finish

Hubs: heat-treated steel - black finish,

resp. GGG 60

• for high torques up to 38000 Nm

• backlash free, exact torque transfer, high torsional stiffness

• low moments of inertia, high tolerance of shaft displacements

• three- parted construction, easy to fit, variable in use

Ordering example: (see example on page 17) KXL 6; L 16 = 72 mm (A = 200 mm)

D1 = hub A for shaft-Ø 80 h6

D2 = hub A for shaft-Ø 90 h6

Selection table

A B C E F G

Characteristics

torsionally stiff ++ ++ ++ ++ ++ ++

backlash free ++ ++ +/- +/- ++ ++

moment of inertia ++ ++ ++ ++ ++ ++

changing of torque ++ ++ + + ++ ++

reversing operation ++ ++ +/- +/- ++ ++

free radial disassembly ++ - ++ - +/- +/-

easy to fit + + ++ ++ ++ ++

cost-effective + + ++ ++ ++ ++

Example - technical application:

Technical parameters: - Tmax = 7000 Nm - changing torque

- shaft distance: 200mm .....

Further requirements: - free radial disassembly, backlash free

Selection: Size KXL 6 - double-sided hub type A

Calculation of the technical parameters:

• Total length: L4 = shaft distance 200 mm +2 · L2 = 320 mm

• Length of intermediate pipe:L16 =(L4+4mm)-2·(L1 + L14 + L15)= 69mm

• Total weight approx.: mtot = 2 · mA + mBL16 = 29 kg

• Moment of inertia approx.: Jtot = 2 · JA + JBL16 = 0,22 kgm²

• Torsional stiffness: CTtot =1

= 893 Nm/arcmin1 / CTB + L16 / CTZR

• Max. radial displacement: Rmax = (L16+L15) · tanδw

= 1,2 mm2


Servo couplings


Technical data:

KXL torque torsional stiffness spring rate moment of inertia

Size

nominal max.total

1) bellow pipeaxial angular

per hub per hub per hubbellow

1)

torque torque (2x2) (per mm) A / B C / E F / G

TN Tmax CT L16 CT B CT ZR ·10³ Ca Cw JA/JB JC / JE JF / JG JBL16

[Nm] [Nm] [Nm / arcmin] [N / mm] [Nm / °] [kgm²] [kgm²] [kgm²] [kgm²]

2,5 2.500 3.500 353 433 69 370 18 0,02 0,02 0,01 0,01

3,5 3.500 5.000 550 673 123 350 25 0,06 0,05 0,02 0,02

6 6.000 8.000 960 1.194 245 405 40 0,11 0,10 0,04 0,03

8,5 8.500 11.000 1.361 1.729 384 460 55 0,16 0,13 0,06 0,05

13,5 13.500 17.000 2.200 2.875 750 410 72 0,22 0,23 0,08 0,11

19 19.500 24.000 3.181 4.269 1.248 415 105 0,47 0,51 0,18 0,19

30 30.000 38.000 5.323 6.974 2.473 390 153 1,27 1,26 0,53 0,41

KXL max. shaft displacement mass

per hub per hub per hubaxial ± angular radial1)

A / B C / E F / Gbellow1)

Sizeδa δw δr L16 mA / mB mC / mE mF /mG mBL16

[mm] [°] [mm] [kg] [kg] [kg] [kg]

2,5 3 1,4 0,8 5,8 5,5 2,5 1,3

3,5 3,2 1,3 0,8 9,7 9,7 3,3 1,7

6 3,5 1,3 0,9 13,1 13,5 5,7 2,6

8,5 3,8 1,3 1,2 17,9 16,5 7,1 3,5

13,5 4,4 1,3 1,3 20,3 22,7 7,9 5,1

19 4,6 1,2 1,5 32,1 37,4 11,6 6,6

30 4,8 1,2 1,6 58,2 61,3 20,6 9,3

LA

LA + 4mm

1) Parameters for

standard length L 16

Data depending on length:

Total torsional stiffness:

CTges =1

1/CTB + L16/CTZR

Max. allowed radial displacement:

δwRmax = (L16+L15)·tan

2

Note: The specific parameters for

the total weight resp. the total

moment of inertia must be rounded

off in dependence of length "L 16".

Note: In case of shift frequencies of up to 5x per hour, a momentary start push of

1.2 x Tmax is possible. In cases of reduced torques or lower endurance, larger

shaft misalignments are possible (please further consultation). If axial, angular

and radial displacements occur at the same time, the total must not exceed 100%

(see formula).

δ a existing +

δ w existing +

δ r existing < 1

δ a allowed δ w allowed δ r allowed


Servocouplings


Size 2,5 3,5 6 8,5 13,5 19 30

D1 min 65 70 75 80 90 110 130

D2 max 80 90 100 110 130 150 170

D3 130 157 175 192 205 247 304

D4 110 128 140 155 185 210 240

D5 138 167 198 218 272 322 406

D6 65 65 80 80 100 130 200

D7 171 203 236 259 319 372 460

D8 115 142 176 193 208 250 325

L1 55 60 68 75 83 89 103

L2 48 53 60 66 74 79 93

L3 40 44 48 52 60 64 76

L4** 248 270 305 343 366 409 460

L5 - - 20 23 23 25 27

L6 - - 8 9 10 12 13

L7 - - 43 49 55 62 68

L8 - - 38 44 44 45 50

L9 - - 68 75 83 89 103

L10** - - 209 239 246 281 308

L11 80 90 100 110 130 150 170

L12** 298 330 369 413 460 531 594

L13 4 4 4 4 4 5 5

L14 23 25 28 32 22 25 25

L15 28 29,5 31,5 34,5 38 40,5 44

L16* 36 41 50 60 80 100 110

L17** 164 184 211 227 280 309 348

L18 17 17 21 21 21 25 25

L19 5 5 5 5 5 6 6

L20** 134 142 163 179 206 241 258

L21 21 21 25 25 25 30 30

Dimensions (mm)according to DIN ISO 2768 cH

Ø D

1

Ø D

3

L2

L3

Ø D

2

L14L15

hubA

L4**

Ø D

7

Ø D

8

L1 L16

±2

L7

L9

L8Ø

D1

Ø D

2

L10**

hubB

L5

L14 L16

Ø D

7

L6

Ø D

8

L15

±2

L11

Ø D

4

Ø D

1

Ø D

2

L12**

L14 L16

hubC

Ø D

7

Ø D

8

L15

±2

Ø D

1

Ø D

2

L16

hubE

Ø D

7

L17**

L11

L14

Ø D

8

L15

±2

Ø D

9 h

7

L18

Ø D

11

Ø D

6

L13

L20**

Ø D

7

Ø D

12

H7

L19

L21

hubF G

Ø D

10

L15

Ø D

5

±2

L 16

* sStandard length - intermediate part:

Different dimensions for L 16 possible, please advice

along with the order.

** Overall length for standard length L16

Note:

• Dimensions of ØD9, ØD10, ØD11, ØD12 customized.

• Threat sizes and tightening torques for the clamping

screws of flanges and clamping ring hubs are available

on the mountening instructions.

• hub version B for size 2,5 and 3,5 on request

Series KE - flange design

• costeffective, torsional stiff metal

bellows coupling

• attachement for flanges, special hubs,

locking assemblies, gearboxes ...

• hub dimensions and bellows size

customized up to 40.000 Nm

Series KHS - “High Speed” - design

• speed upto 25.000 rpm

• Aluminium design - low inertia

• special conical clamping ring

connection

• rotary symetric design

- high balance quality

• 6 different size from 15 upto 600 Nm

Series KPP - plug- in design

• different hub variations with

backlashfree key - groove - design

• whole metal version, upto 300°C

• easy assembly (plug - in)

with bellow - preload

• adaption for customized

application up to 1.500 Nm

Series KH - splitted hub design

• backlash free, torsional stiff

membrane coupling

• easy assembly through splitted

hub design

• whole metal version, upto 300°C

verschleiß und wartungsfrei

• 6 different sizes from 25 upto 500 Nm

Special variations

• special hub and bellow design

according to customer request

• stainless steel couplings, for vacuum-,

or satelite technic applications

• optimized solutions for motor-, gearbox-

connection with extremely short design,

only 2 corrugations

Metal bellows couplings Special couplings

Servo couplings


Elastomer couplings General

Application examples

The possible areas of applications for the elastomer couplings

range from demanding drive systems in the general machine

design, to applications in the instrumentation and control

technology, to the spindle and axis drives of machine tools.

Elastomer couplings of series “E” can be plugged in, are

backlash free, flexible shaft-couplings for small to

medium torques. A elastomer spider serves as connec-

tion and compensation element with involute-shaped

teeth and high Shore hardness. This is inserted form fit-

ting, with slight preload between two high precision

machined hubs with involute shaped jaws. The elasto-

mer spider can compensate slight shaft misalignments,

is electrically insulating and demonstrates a good

oscillation dampening characteristic. Two variations with

backlash free, frictional shaft-hub connection are

available as standard which ensure a safe torque

transfer, even without keyways.

Characteristics:

• plug-in, backlash free, flexible

• elastomer spider with different shore hardness

• low moment of inertia, high speed

• oscillation dampening

• series ESM according to DIN 69002 (proposed)

Standardseries:

• Series EKM with easy to fit radial clamping hub

• Series ESM with conical hub and clamping ring for high speeds

• Series ESM-A with aluminium conical hub, reduced mass moment of inertia

• Series EKS with expanding cone and radial clamping hub, short design

• (other combinations available on request)

Material:

radial clamping hub EKM. high tensile aluminium

hub ESM: heat-treated steel - black finish

coniacal hub ESM-A: high tensile aluminium

clamping ring ESM: heat treated steel-black finisch

Elastomer spider: polyurethane 98 Shore-A (red)

or polyurethane 72 Shore-D (white)

alternative elastomer- hardness on request

• Series EKZ with radial clamping hub on

both sides and intermediate pipe(more details under couplings with intermediate shaft)

• Series ESM with special flange for

brake attachement

Servocouplings


Elastomer couplings Dimensioning

Rough calculation formula:

Roughly, the required coupling torque TK can be calculated as for the following formula:

Coupling layout:

The important layout criteria are the required drive torque, the necessary torsional stiffness and the dampening

characteristic of the coupling. Additionally, the minimum or maximum possible shaft diameter, the admissible

temperature range, operating factors and the existing shaft misalignment, particularly the radial displacement,

must be taken into consideration. Basically, the selection can be influenced by the coupling size and the

hardness of the elastomer spider.

TK = TA • fD • fT • fB < TKN_

TA = drive torque [Nm]

f D = torsional stiffness factor

f T = temperature factor

f B = operating factor

The calculated coupling torque TK should not exceed the nominal torque of the selected coupling size.

Short term overload up to twice the value of the nominal torque is admissible.

TA =9550 x PA

TA = drive torque [Nm]

PA = motor output [KW]

nB = motor speed [min-1]nB

Temperature factor f :

Admissible temperature range for continuous operation

PUR 98 Sh - A : -30 °C bis + 90 °C

PUR 72 Sh - D : -20 °C bis + 120°C

Operating

temperature

Factor fT

+30°C

- 30°C+50°C +70°C +90°C +110°

1 1,3 1,6 1,8 2

Torsional stiffness factor f :

If an exact, accurate transfer of the torque is required,

as for instance with servo drives or measuring systems,

a high torsional stiffness is absolutely necessary.

Here the required drive torque should be multiplied with

a operating factor of at least 3 to 10 when selecting

the size, or a torsionally stiff metal bellows coupling

selected from the extensive coupling range in this

catalogue.

Operating factor f :

Due to operating factor fB application specific

peculiarities, such as shock loading, are taken into

consideration.

Application example: ESM-coupling: drive of a short bore spindle according to DIN 69002 (design)

Note on DIN 69002 (design):

Technical data and dimensions of several sizes in the

series ESM are according to the specifications of DIN

69002. Therefore, the ESM couplings are particularly

suitable for use in spindle drives (i.e. short bore spind-

les) for high speeds.

Low mass moments of inertia and high degree of

balance ensure excellent dynamic characteristics. The

coupling is prepared for an axial clamping of the

spindle bearing, as well as for a central coolant feed

through.

Servocouplings


D

T

B

Servocouplings


Elastomer couplings Installation instructions

Assembly

The design of the ESM coupling requires mounting of

the two hub halves on the shaft ends before the

actual plug- in assembly. Here it must be noted, that

the mounting screws are tightened evenly crosswise,

to prevent surface distortion of the conical clamping

ring. Couplings of the EKM series, on the other hand,

can be completely assembled before the hub

mounting. For mounting the EKM hub only a radially

arranged clamping screw must be tightened.

Chamfered edges at the face basically also enable a

blind assembly with both versions. Due to the obliga-

tory preclamping of the elastomer, an axial assembly

force must be applied during the sliding

together of the coupling spider and the jaws. This

assembly force can be minimised by slight oiling of the

spider. For disassembly of the ESM conical hub, push-

off threads are provided for releasing the clamping

ring. The relevant tightening torques of the retaining

screws can be found in the technical data sheets.

The seat saft / hub is to be selected as transitional

seat (e.g. bore *28G6 / shaft *28k6).

Admissible seat clearance shaft / hub: Series ESM: max. 0,02 mmSeries EKM: min. 0,01mm / max. 0,04mm

To ensure satisfactory function, the dimension “g”

should be complied with as exactly as possible.

The distance of the two shaft ends can certainly be

smaller than “g” under consideration of the measure-

ments “m” and “n”.

Assembly procedure

elastic deforming throughaxial assembly force

backlash free due toelastic distortion

galternating sidedistance knobs

Notes:

• The dampening capability of the elastomer spider

protects the drive to a high extend from dynamic

overload. Both coupling halves are always forced to

move (min. 3xTN) because of the jaw construction,

even if the spider should break down totally (e.g.

safety instructions - vertical axis).)

• Because of the deformation of the elastomer spider

under operation conditions, the housing (bell) should

be approximately 5 % bigger than the outer diameter

of the coupling itself.

• To ensure satisfactory function, the dimension "g"

should be complied with as exactly as possible. The

distance of the two shaft ends can certainly be

smaller than "g" under consideration of the

measurements "m" and "n" of the spider.

• For additional price, the radial clamping hubs can

also be equipped with the easy-to-fit

"Easy-Clamp-System" upon request

(see also page 8).

• For smaller shaft diameters, the conical hub of

ESM-couplings is additionally slitted.

Dimensions - Elastomerspider

Ø p

Ø m

o

JAKOB

50

x 4

5

E - 60

n

Ø s

Sizes Ø s Ø m n o Øp +0,5

8 / 10 32 10,5 2 10 8,5

15/17/20/25 40 18 3 12 9,5

30/43/45/50 50 27 3 14 12,5

60 / 90 55 27 3 14 12,5

150 / 200 65 30 4 15 14,5

300/320/400 80 38 4 18 16,5

500 100 47 5 22 20,5

700 / 1000 120 58 6 25 22,5

Material:• Polyurethan

• 98 Shore - A / red

• 72 Shore - D / white

• different shore hardness available on request

Note: If required by the customer for special appli-

cation (e.g. longer shaft plug in depth), diameter "p"

of the inner bore of the spider can be extended up

to max. øm-2mm (upon request ).

Elastomer coupling Series EKM• radial clamping hub on both sides, plug in , backlash free

• cost - effective standard series

EKM TNmoment torsional stiffness max. shaft radial mass tightening torque

hardnessof inertia (stat. at 0,5 x TN) displacement [mm] spring rate approx. of screws

Size [Nm] [Shore] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [kg] [Nm]

8 8 98 Sh-A 0,01 0,04 0,5 0,10 600 0,06 4

15 15 98 Sh-A 0,03 0,24 0,5 0,10 2100 0,12 8

20 20 72 Sh-D 0,03 0,34 0,5 0,07 2900 0,12 8

30 30 98 Sh-A 0,09 0,41 0,5 0,10 2500 0,21 14 (8)*

45 45 72 Sh-D 0,09 0,58 0,5 0,07 3600 0,21 14

60 60 98 Sh-A 0,18 0,61 0,5 0,10 2600 0,32 35

90 90 72 Sh-D 0,18 0,90 0,5 0,07 3700 0,32 35 (14)*

150 150 98 Sh-A 0,38 1,05 1 0,10 3300 0,52 67 (35)*

200 200 72 Sh-D 0,38 1,50 1 0,07 4600 0,52 67 (35)*

300 300 98 Sh-A 1,0 2,00 1 0,12 4500 0,9 115 (67)*

400 400 72 Sh-D 1,0 2,85 1 0,10 6500 0,9 115 (67)*

500 500 98 Sh-A 2,2 5,80 1 0,15 5900 1,5 115

700 700 98 Sh-A 5,2 8,00 1 0,15 7000 2,5 185

1000 1000 72 Sh-D 5,2 12,0 1 0,10 9600 2,5 185

Technical data:

Dimensions: (mm) length dimensions according to DIN ISO 2768 mH

Ordering example: EKM 90 - D1 = 24 G7 D2 = 27 H7

Ø a

c

Ø D

2

Ø D

1

l

h

e e

f - DIN 912

g

Material:

- elastomer spider: polyurethane



EKM Ø a c e f g h l Ø D1/2 ØD1/2 ØD1/2

min max prebored

8 32 10,5 13,5 M 4 13 6 40 8 15 6

15 40 13,5 17 M 5 16 8 50 10 20 7

20 40 13,5 17 M 5 16 8 50 12 20 7

30 50 16,5 (18)* 20 M 6 (M 5)* 18 9 58 13 26 (30)* 9

45 50 16,5 20 M 6 18 9 58 18 26 9

60 60 19,5 22 M 8 18 10 62 15 29 12

90 60 19,5 (20)* 22 M 8 (M 6)* 18 10 62 20 29 (32)* 12

150 70 23 (25)* 26,5 M10 (M 8)* 20 12 73 22 33 (38)* 15

200 70 23 (25)* 26,5 M 10 (M 8)* 20 12 73 26 33 (38)* 15

300 85 29 (30)* 31 M 12 (M 10)* 24 14 86 30 42 (46)* 18

400 85 29 (30)* 31 M 12 (M 10)* 24 14 86 35 42 (46)* 18

500 100 36 33 M 12 28 16 94 38 56 20

700 120 44 38 M 14 33 18 109 40 70 24

1000 120 44 38 M 14 33 18 109 48 70 24

*CAUTION: state alternative separately while ordering (for larger shaft diameters)

Servocouplings


Elastomer coupling Series ESM / ESM-A• with conical hub and clamping ring, plug in, backlash free

• rotary symetric design, high speed

ESMTN

momentof inertia torsionalstiffness max. shaft radial mass tightening torque max. size

ESM-A hardness (10-3kgm2) (stat.at0,5xTN) displacement(mm) springrate (kg) of screws speed accordingSize [Nm] [Shore] ESM ESM-A [Nm/arcmin] axial± lateral [N/mm] ESM ESM-A [Nm] [min-1] DIN 69002

10 10 98Sh-A 0,02 0,015 0,04 0,5 0,1 600 0,15 0,11 1,8 20.000 25x20

17 17 98Sh-A 0,08 0,05 0,24 0,5 0,1 2100 0,35 0,28 4 18.000 32x30

25 25 72Sh-D 0,10 0,06 0,35 0,5 0,07 2900 0,35 0,28 4 18.000 -

43 43 98Sh-A 0,29 0,19 0,40 0,5 0,1 2500 0,65 0,4 8 14.500 40x35

50 50 72Sh-D 0,29 0,19 0,58 0,5 0,07 3600 0,65 0,4 8 14.500 -

60 60 98Sh-A 0,43 0,28 0,60 0,5 0,1 2600 0,9 0,6 8 13.000 50x45

90 90 72Sh-D 0,43 0,28 0,90 0,5 0,07 3700 0,9 0,6 8 13.000 -

150 150 98Sh-A 0,92 0,65 1,05 1 0,1 3300 1,2 0,9 8 11.000 63x55

200 200 72Sh-D 0,92 0,65 1,52 1 0,07 4600 1,2 0,9 8 11.000 -

320 320 98Sh-A 2,70 2,0 2,00 1 0,12 4500 2,6 1,9 35 9.000 -

400 400 72Sh-D 2,70 2,0 2,85 1 0,1 6500 2,6 1,9 35 9.000 -

500 500 98Sh-A 8,80 5,6 5,80 1 0,15 5900 6,0 4,5 67 7.500 -

700 700 98Sh-A 20,5 13,0 8,00 1 0,15 7000 9,5 7,0 115 6.000 -

1000 1000 72Sh-D 20,5 13,0 12,0 1 0,1 9600 9,5 7,0 115 6.000 -

Technical data:


Ordering example: ESM-A 150 - D1 = 17 G7 D2 = 22 H6

l1 1

Ø D

1

Ø b

k

e

Ø D

2

Ø a

+0,2

f-DIN 912

e g

Material:

- Elastomer spider: polyurethane

- conical hub: ESM: heat treated steel - black finish

- conical hub: ESM-A: high tensile aluminium

- clamping ring: heat treated steel - black finish


ESM Ø a Ø b e f g k l Ø D1/2 Ø D1/2 Ø D1/2ESM-A min max prebored

10 32 17 18,5 4x M 3 13 15,5 50 6 14 6

17 40 22 25 6x M 4 16 21 66 9 19 9

25 40 22 25 6x M 4 16 21 66 10 19 9

43 50 29 30 4x M 5 18 25 78 12 24 10

50 50 29 30 4x M 5 18 25 78 15 24 10

60 55 30 30 4x M 5 18 25 78 12 26 12

90 55 30 30 4x M 5 18 25 78 16 26 12

150 65 40 35 8x M 5 20 30 90 17 36 12

200 65 40 35 8x M 5 20 30 90 19 36 12

320 80 46 45 4x M 8 24 40 114 20 40 18

400 80 46 45 4x M 8 24 40 114 25 40 18

500 100 58 55 4 X M10 28 49 138 22 48 20

700 120 72 61 4x M 12 33 54 155 25 60 24

1000 120 72 61 4x M 12 33 54 155 25 60 24

Servocouplings


Elastomer coupling Series EKSwith expanding cone

EKS TNmoment torsional stiffness max.shaft radial mass tightening torqueof inertia (stat. at 0,5 x TN) displacement [mm] spring rate approx. of screws [Nm]

Size [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [kg] “i” “f”

8 8 0,01 0,04 0,5 0,1 600 0,1 4 4

15 15 0,03 0,23 0,5 0,1 2100 0,2 8 8

60 60 0,16 0,60 0,5 0,1 2600 0,4 14 34

150 150 0,38 1,00 1 0,1 3300 0,7 34 67

300 300 0,94 2,00 1 0,12 4500 1,1 67 115

500 500 2,60 5,80 1 0,15 5900 2,1 35 115

700 700 5,10 8,00 1 0,15 7000 3,0 35 185

Technical data:

EKS Ø a Ø b c e f h i l t min t maxØD1 ØD2 g6

min max min max

8 32 32 10,5 12 M 4 6 M 4 44,5 12 19 8 15 10 14

15 40 40 13 20 M 5 8 M 5 59 16 23 10 19 13 18

60 60 55 19,5 25 M 8 10 M 6 73 21 29 15 29 15 20

150 70 65 23 26 M 10 12 M 8 81,5 25 34 22 33 20 28

300 85 80 29 30 M 12 14 M 10 93 30 41 30 42 25 32

500 100 100 36 32 M 12 16 M 12 106 32 44 38 56 30 38

700 120 120 44 42 M 14 18 M 12 121,5 37 51 40 70 35 48


Ordering example: EKS 60 - D1 = 18 G7 - D2 = 20 g6

c

l

t

Ø D

1

e

Øb

ØD

2 g

6

Einstecktiefe

f - DIN 912

i - DIN 912Ø a

h

Notice: The associated bore size for the expanding cone >>ØD2<< with tolerance H7.

Application example:

Integrated design

of a EKS coupling.

• plug in, backlash free, oscillation dampening

• expanding cone, radial clamping hub

• short design for hollow - shaft - assembly

Material:

- hub: high tensile strenght aluminium

- expanding cone: heat trated steel


- elastomer spider: polyurethane 98 Sh-A

Servocouplings


Servocouplings


Elastomer couplings Special series

combination EKM - ESM• for connection of shafts with very

different diameters

• to facilitate the assembly of

shaft-hub-connections:

1.) ESM - hub from inside

2.) plug-in assembly - elastomer spider

3.) EKM - hub radially from outside

• to achieve an fitting intermediate length

axial stop design

• by additional snap ring at the

periphery

• for taking up resp. supporting

large axial forces

• nevertheless compensation of

parallel and angular misalignment

• might also be used for easier

mounting

double-cardan design

• with double-claws - intermediate piece and

two elastomer spiders (variable in length)

• extremely flexible, so compensation of large

misalignments is given (parellel misalignments)

• very good dampening of oscillation, however, the

torsional stiffness is reduced by 50 %.

special hub designs

• for flanging, pressing, etc. to special parts

required by the customer

• with feather keyways or profile bore

• claw outline can be integrated directly into

the element required by the customer (e.g.

pinion shaft - gear entrance

• hubs in half-shell version e.g. for mounting

at stationary journal of a shaft

Miniature - metal bellows coupling Series MKM

MKM TNmax. moment torsional max. shaft spring rate mass tightening torque

speed of inertia stiffness displacement [mm] [N/mm] approx. of screwsSize [Nm] [min-1] [10-6kgm2] [10-3Nm/arcmin] axial ± lateral axial radial [g] [Nm])

0,4 0,4 20.000 0,3 50 0,35 0,2 10 15 10 1

0,9 0,9 20.000 0,4 90 0,3 0,2 21 26 12 1

2 2 12.000 3,0 230 0,5 0,2 15 15 30 2

4 4 12.000 3,0 460 0,4 0,2 35 65 40 2

7 7 12.000 14 1100 0,6 0,25 45 60 70 4

8 8 12.000 26 1350 0,8 0,30 16 24 130 7

12 12 12.000 30 2050 0,7 0,25 40 50 140 7

Technical data:

Ordering example: MKM 0,9 - D1 = 4 H7 D2 = 5 G7

f - DIN 912

Ø D

2

h

l

Ø a

c

Ø D

1

b

MKM Ø a b c f h l ±0,5 Ø D1/2min Ø D1/2max

0,4 16,5 9 4,6 M 2,5 3,3 30 3 6

0,9 16,5 9 4,6 M 2,5 3,3 31,5 3 6

2 24,5 (27,5) 13 7,5 (9,6) M 3 4,4 42 3 10 (14)

4 24,5 (27,5) 13 7,5 (9,6) M 3 4,4 43,5 3 10 (14)

7 34 14 11 M 4 5 57 6 17

8 39,5 (44,5) 16,5 13 (15,5) M 5 6 60 6 19 (21)

12 39,5 (44,5) 16,5 13 (15,5) M 5 6 62 6 19 (21)


MKM Ø 3 Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø 15 Ø 16 Ø19

0,4 /0,9 • • • •2 / 4 • • • • • • •

7 • • • • • • • •8 / 12 • • • • • • • • •

Stock bores D1/D2 (G7)

Remark: Different boresizes are possible on request.

Material:




standard series with radial clamping hub

temperature range: -100 to +300°C

Servocouplings


On request the couplungs from size 2 - 12 are avaiable with EASY - clamp. (see page 8)

Miniature - metal bellows coupling Series MKP

MKP TNmax. moment torsional max. shaft spring rate mass tightening torque

speed of inertia stiffness displacement [mm] [N/mm] approx. of screwsSize [Nm] [min-1] [10-6kgm2] [10-3Nm/arcmin] axial ± lateral axial radial [g] [Nm]

2 2 12.000 2,5 400 0,3 0,1 32 100 30 2

5 5 12.000 2,8 800 0,3 0,1 70 400 40 2

7 7 12.000 12 1700 0,4 0,15 70 220 80 4

8 8 12.000 25 2100 0,5 0,15 20 90 125 7

12 12 12.000 28 2600 0,4 0,15 45 190 130 7

Technical data:

Ordering example: MKP 5 - D1 = 4 G7 D2 = 12 G7

Ø a

Ø D

1

Ø D

2

b

l

h

c

f - DIN 912

MKP Ø a b c f h l ±0,5 Ø D1/2min Ø D1/2max

2 24,5 (27,5) 13 7,5 (9,6) M 3 4,4 35 3 10 (14)

5 24,5 (27,5) 13 7,5 (9,6) M 3 4,4 36 3 10 (14)

7 34 14 11 M 4 5 47 6 17

8 39,5 (44,5) 16,5 13 (15,5) M 5 6 51 6 19 (21)

12 39,5 (44,5) 16,5 13 (15,5) M 5 6 51 6 19 (21)


MKP Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø 15 Ø 16 Ø 19

2 / 5 • • • • • • •7 • • • • • • • •

8 / 12 • • • • • • • • •

Stock bores: D1/D2 (G7)


Material:




short design - with radial clamping hub

temperature range: -100 bis +300°C

Servocouplings


On request all couplings are avaiable with EASY - clamp. (see page 8)

Miniature - metal bellows coupling Series MKA

MKA TNmax. moment torsional max. shaft spring rate mass tightening torque

speed of inertia stiffness displacement [mm] [N/mm] approx. of screwsSize [Nm] [min-1] [10-6kgm2] [10-3Nm/arcmin] axial ± lateral axial radial [g] [Nm]

0,4 0,4 20.000 0,19 47 0,35 0,1 10 15 8 1

0,9 0,9 20.000 0,19 96 0,3 0,1 21 26 10 1

2 2 12.000 2,9 218 0,5 0,1 15 15 32 4

4 4 12.000 3,2 436 0,4 0,1 35 65 37 4

6 6 12.000 16 1.100 0,6 0,25 45 60 85 8

8 9 12.000 28 1.250 0,8 0,25 16 24 120 10

Technical data:

Ordering example: MKA 2 - D1 = 6 G7 D2 = 8 G7

Ø D

2

Ø a

h

l

f - DIN 916

Ø D

1

b

MKA Ø a b f h l ±0,5 ØD1/2min ØD1/2max

0,4 16 7 2x M 3 2,3 26 3 8

0,9 16 7 2x M 3 2,3 27 3 8

2 25 11 2x M 4 3,5 38 5 15

4 25 11 2x M 4 3,5 39 5 15

6 35 12,5 2x M 5 4,3 54 6 20

8 41 14 2x M 6 5 54 6 26


MKA Ø3 Ø4 Ø5 Ø6 Ø6,35 Ø8 Ø9,53 Ø10 Ø12 Ø15 Ø16 Ø19 Ø24

0,4 / 0,9 • • • • • •2 / 4 • • • • • • • •

6 • • • • • •8 • • • • • • • •

Stock bores D1/D2 (G7)


For a easier disassemblage we recommend to have end faces on the shaft.

cost-effective version with set screws

temperature range: -20 bis +150°C

Servocouplings


Material:



- setscrews: DIN 916

Miniature- elastomer coupling Series MJT/MJT-C

MJTmax. moment torsional max. shaft mass tightening torque

TN speed of inertia stiffness displacement [mm] approx. of screws

Size [Nm][min-1] [10-6kgm2]

[10-3 Nm/arcmin] axial ± lateral [ g ][Nm]

MJT / MJT-C MJT / MJT-C f i

14-B 0,7 27.000 / 11.000 0,21 / 0,16 3 0,6 0,15 7 0,7 0,5

20-B 1,8 20.000 / 7.500 1,0 / 1,1 5 0,8 0,20 18 0,7 1

30-B 4 13.000 / 5000 5,9 / 6,2 13 1,0 0,20 48 1,7 2,5

14-R 2 27.000 / 11.000 0,21 / 0,16 7 0,6 0,10 7 0,7 0,5

20-R 5 19.000 / 7.500 1,0 / 1,1 16 0,8 0,10 18 0,7 1

30-R 12,5 13.000 / 5.000 5,9 / 6,2 38 1,0 0,10 48 1,7 2,5

Technical data:

Ordering example: MJT-B 30 - D1 = 8 H8 D2 = 10 H8

MJT-C-R 20 - D1 = 5 H8 D2 = 6 H8

l

h

Ø D

1

Ø D

2

e eg Ø a

f - DIN 916

MJT Ø a c e g h l f i

14 14 4 7 8 3,5 22 2x M3 M2

20 20 6,5 10 10 5 30 2x M3 M2,5

30 30 10 11 13 5,5 35 2x M4 M4


MJT Ø3 Ø4 Ø5 Ø6 Ø6,35 Ø8 Ø9,53 Ø10 Ø12 Ø14

14 • ¤ • ¤ • ¤ •20 • ¤ • ¤ • ¤ • ¤ •30 • ¤ • ¤ • ¤ • ¤ •

Stock bored D1/D2 (H8) • MJT ¤ MJT-C

Material:

- hub: aluminium alloy

- Elastomer spider: polyurethane

B 80-Sh-A (blue), R 98-Sh-A (red)

MJT-C: standard series with radial clamping hub

MJT: cost - effective version with set screws

temperature range: -20 till +70° C


For a easier disassemblage of the MJT size we recommend to have end faces on the shaft.

Servocouplings


l

Ø D

1

Ø D

2

e eg

h ci - DIN 912

Ø a

MJT

MJT-C

Miniature -Oldham-type coupling Series MOS

MOS TNmax. moment torsional max. shaft mass tightening torque

speed of inertia stiffness displacement approx. of screwsSize [Nm] [min-1] [10-7kgm2] [10-3Nm/arcmin] lateral [mm] angular [ °] [g] [Nm]

12C 0,2 13.000 0,71 3 0,6 2 3 0,5

16C 0,4 10.000 3,0 9 1,0 2 8 1

20C 0,7 8.000 7,4 14 1,3 2 13 1

25C 1,2 6.000 22 25 1,5 2 24 1,5

32C 2,8 5.000 73 55 2,0 2 48 2,5

Technical data:

Ordering example: MOS-25-C - D1 = 8 H8 D2 = 10 H8

Ø D

1

Ø D

2

Ø a

l

c bf - DIN 912 h

MOS Ø a b c h l f

12C 12 5 4 2,5 14,9 M 2

16C 16 7 5 3,5 21 M 2,5

20C 20 7 6,5 3,5 22,1 M 2,5

25C 25 8 9 4 27,2 M 3

32C 32 10 11 5 33,3 M 4


MOS Ø3 Ø4 Ø5 Ø6 Ø6,35 Ø8 Ø9,53 Ø10 Ø12 Ø14

12C • • •16C • • • •20C • • • •25C • • • •32C • • • • •

Stock bores D1/D2 (H8)


Material:

- hub: aluminium alloy

- spacer: polyacetal

standard series with radial clamping hub

temperature range: -20 till +80° C

Servocouplings


Distance couplings general

This category comprises several coupling series which can span axial distances of up to 5 m of length. The

common main characteristic feature of all types is an intermediate pipe resp. a metal bellow part, which is varia-

ble in length and can fit exactly the required applications of the customer. In many cases, they can be used as

spacer shaft (synchronizing shaft) and can substitute conventionel constructions of intermediate shafts with

complicated additional intermediate bearings. Misalignments, especially parallel misalignments, can be

compensated to a higher extend. Furthermore the stainless material and the easy assembly of all series must be

emphasized. A secure, frictional connection with easy operation is given because of the hub design in half-shell

version (series WB, WBA, KLH) resp. with sliding hub (series EKZ).

Servo couplings


Characteristics:

• variable in length, up to 5 m axial distance - compensation of displacements

• as connecting shaft without additional intermediate bearing

• high torsional stiffness - backlash free, exact torque transfer

• low moment of inertia - high speed

• very easy to fit - stainless design - maintenance free

The customer can chose between four standard series:

• Series KLH with stainless steel bellow, variable in length • L ~ 0,1 - 0,5 m • half-shell hub • torsionally stiff • flexible~

• Series EKZ with aluminium intermediate pipe • L ~ 0,2 - 3 m • plug-in sliding hub • oscillation dampening~

• Series WBA with aluminium intermediate pipe • L ~ 0,5 - 5 m stainless steel-membrane hub • low moment of inertia ~

• Series WBS with stainless steel intermediate pipe • L ~ 0,5 - 5 m r stainless steel-membrane hub • very high torsional stiffness~

EKZ - coupling

for lifting table drive WBS - Coupling

for multi-axis linear module

mountening length - intermediate pipe

Distance couplings assembly

Servocouplings


The splitted hub-, or the shifting hub design allows for an easy assembly. Further simplification during installa-

tion is provided because one half of the split hub is screwed onto the pipe. This allows that the coupling can rest

on the two shaft ends. The second half of the split hub can be then mounted to the coupling by screwing it on

from below with the specified tightening torque. This feature makes a “one man assembly” possible even with

extremely long couplings. During maintenance, the WB coupling can be exchanged without disassembling the

drive or output units.

Ø D

1

Ø D

2

x

Formulas for length determination:

L = x + t1 + t2 [mm]x= shaft seperation ± 1

t = plug in depth ± 1

(see data sheets)

Series KLH

- splitted hub

design

Series EKZ

- plug in hub

- shifting seat at shaft-ends

Series WBA

- splitted hub

design

Series WBS

- splitted hub

design

KLH TNtorsional stiffness max. speed max. shaft displacement moment

mass[Nm/arcmin] approx. [min-1] [mm] of inertia

Size [Nm] 0,2m 0,3m 0,4m 0,5m 0,2m 0,3m 0,4m 0,5m 0,2m 0,3m 0,4m 0,5m [10-3kgm2] [kg]

25 25 3,3 5,1 3,6 2,8 6000 4000 3000 2500 2,5 2,5 4,5 7 0,3 0,7

50 50 5,6 8,9 6,3 5 6000 4000 3000 2500 2,5 2,5 3,5 6 0,6 1,1

100 100 16 17 12 9,5 6000 4000 3000 2500 1,5 2 3,5 6 1,8 2,1

200 200 36 39 27 21 6000 4000 3000 2000 1,5 1,5 2,5 4 4 3,3

400 400 78 73 51 39 6000 4000 3000 2000 1 1,5 2,5 3,5 9 5

Technical data:

tighteningKLH Ø a* Ø b c e f - torque h L min t Ø D1/2min Ø D1/2max

25 50 / 55 46 34,5 22 M5 - 8 Nm 9 78 16 12 28

50 60 / 65 56 40 24 M6 - 14 Nm 10 80 18 18 32

100 78 / 81 73 55 28 M8 - 34 Nm 12 98 22 20 44

200 95 / 98 88 66 32 M10 - 65 Nm 14 110 25 24 52

400 116 / 118 108 82 35 M12 - 115 Nm 15 116 28 32 65


Ø b

Ø a

Ø D

1

Ø D

2

e

h

L = variabel ±1

c

f - DIN 912

t

Metal bellows coupling Series KLH

Caution: * At a total length over 250 mm the bigger outer diameter is valid.

Servocouplings


max. axial shaft displacement: approx. ± 2 mm

Material:

- bellows : stainless steel 1.4571

- hubs : stainless steel 1.4301

- screws : DIN 912 - nickel plated

• customied length from 100 - 500mm

• backlash free, torsional stiff, flexible upto 400 Nm

• allows for high misalignments, low restoring forces

• simple installation, splitted hub design

• stainless version, maintenance- and wear free

stainless steel

Ordering example: KLH 100 - D1 = 20 H8 D2 = 30 G7 L=355

TNtorsional stiffness moment of inertia mass

EKZ(stat. at 0,5 x TN) [Nm/arcmin] [10-3kgm2] ca. [kg]

Size [Nm] 0,5m 1m 2m 3m 0,5m 1m 2m 3m 0,5m 1m 2m 3m

20 20 01 0,07 - - 0,08 0,10 - - 0,5 0,9 - -

45 45 0,25 0,19 0,13 - 0,27 0,36 0,56 - 1,0 1,7 3,0 -

90 90 0,3 0,23 0,15 0,12 0,45 0,54 0,74 0,92 1,3 1,9 3,1 4,4

200 200 0,5 0,4 0,3 2,0 0,9 1,1 1,4 1,9 1,8 2,5 3,9 5,3

400 400 1,2 1,0 0,8 0,6 2,5 3,2 4,5 5,7 3,1 4,5 7,2 9,8

700 700 3,0 2,5 1,8 1,4 11 12,5 14 17 6,6 8,3 11,4 14,5

Technical data:

EKZ Ø a Ø b c f - tightening h k Lmin s tmin tmax ØD1/2 ØD1/2torque min max

20 40 20 13,5 M 5 - 8 Nm 8 50 132 16 16 20 10 20

45 50 30 16,5 M 6 - 14 Nm 9 58 152 18 18 25 13 26

90 60 30 19,5 M 8 - 35 Nm 10 62 160 18 20 26 15 29

200 70 35 23 M 10 - 67 Nm 12 73 186 20 23 30 22 33

400 85 50 29 M 12 - 115 Nm 14 86 220 24 28 35 30 42

700 120 60 44 M 14 - 185 Nm 18 109 284 33 35 42 40 70


Ordering example: EKZ 200 - D1 = 32 H7 D2 = 28 G7 L = 660

Ø b

shift back - hubk

s

L

Ø D

1

Ø D

2

c

h plug in depth

Ø a

tf - DIN 912

Elastomer coupling Series EKZwith intermediate pipe

maximal shaft displacement axial ± 1 mm

maximal shaft displacement lateral 5mm per meter

Notice: By application with more than 1500 rpm speed and a total coupling length of more than 2 m

contact first JAKOB.

Servocouplings


Notice: Shifting hub of size EKZ 400 with clamping screw M 10 - tightening torque = 67 Nm.

Material:

- Elastomer spider: Polyurethen 72 Shore-D

- clamping hub: high tensile aluminium

- Zwischenrohr: Aluminium precision-pipe

• customized length upto 3 m

• plug in, backlashfree, oszillation dampening

• cost- effective solution

• simple installation, radial clamping hub on both sides

TNtorsional stiffness moment of inertia max. speed mass

WBA[Nm/arcmin] [10-3kgm2] approx. [min-1] approx. [kg]

Size [Nm] 1m 2m 3m 4m 5m 1m 2m 3m 4m 5m 1m 2m 3m 4m 5m 1m 2m 3m 4m 5m

20 20 1 1 1 - - 0,8 1,2 1,5 - - 3500 875 390 - - 2,6 4,2 5,8 - -

40 40 3 2 2 1 - 2,2 3,4 4,6 5,8 - 5100 1275 570 320 - 4,3 7,2 10,1 13 -

80 80 6 3 2 2 1 6 8 10 12 15 6200 1550 690 390 250 6,9 10,2 13,5 16,8 20,1

160 160 6 3 2 2 1 7,5 9,6 11,7 13,8 15,9 6600 1650 735 415 265 6,4 9,2 12 14,8 17,6

320 320 11,3 6 4 3 3 15,6 20,2 24,8 29,4 34 7200 1800 800 450 290 11 16 21 26 31

Technical data:

WBA Ø a Ø b c f - tightening h1 h2 k tmin tmax ØD1/2min ØD1/2maxtorque

20 59 35 42 M 6 - 14 Nm 7 31 39 13 23 11 32

40 69 50 53 M 6 - 14 Nm 7 31 39 13 23 14 42

80 89 60 70 M 8 - 35 Nm 10 40 50 18 29 17 54

160 99 62 77 M 10 - 65 Nm 10,5 41,5 52 18 30 25 60

320 109 70 84 M 12 - 110 Nm 12 51 63 20 40 30 63


Ordering example: WBA 80 - D1 = 20 H8 D2 = 42 G7 L = 2850

A

A

c

Ø D

1

A - A

h1

h2

t

Ø a

k

Ø b

L

e - DIN 912

f - DIN 912

shaft penetration

Ø D

2

Membrane coupling Series WBAwith intermediate pipe

Servocouplings


maximal shaft displacement axial ± 0,5 mm

maximal shaft displacement parallel ± 2 mm per meter

Material:

- intermediate pipe : aluminium (alt.: steel)

- hub : stainless steel 1.4305


• customized length from 0,5m upto 5 m

• backlashfree, torsional stiff, low moment of inertia

• easy installation, splitted hub design

• maintenance- and wear free

WBS TNtorsional stiffness moment of inertia max. speed mass

[Nm/arcmin] [10-3kgm2] approx. [min-1] approx. [kg]Size [Nm] 1m 2m 3m 4m 5m 1m 2m 3m 4m 5m 1m 2m 3m 4m 5m 1m 2m 3m 4m 5m

25 25 4 3 2 - - 2,3 4,2 6,1 - - 7000 1800 800 - - 3,2 5,4 7,6 - -

50 50 8 5 3 2 - 4,6 8,3 12 16 - 8000 2000 900 500 - 4,7 8,0 11 14 -

125 125 13 8 6 5 4 9,0 16 23 30 37 9000 2400 1100 600 400 6,5 10 15 19 23

250 250 24 14 10 8 6 17 29 41 53 65 9000 2800 1300 700 450 8,7 13 18 23 28

500 500 35 20 14 11 9 27 44 62 79 97 9000 3200 1400 800 500 11 16 22 27 33

Technical data:

tighteningWBS Ø a Ø b c f - torque h t ØD1/2min ØD1/2max

25 59 60 38 M8 - 35 Nm 11 21 10 28

50 69 70 48 M8 - 35 Nm 12 23 12 38

125 84 85 58 M10 - 65 Nm 13,5 26 16 45

250 99 102 69 M12 - 115 Nm 15,5 30 22 55

500 113 114 78 M14 - 185 Nm 18 35 30 62


Ordering example: WBS 125 - D1 = 20 H8 D2 = 42 G7 L=2850

c

L=variabel ±0,5

t

Ø a

Ø D

1

Ø D

2

h

f - DIN 912

Ø b

Membrane coupling Series WBSwith intermediate pipe

Servocouplings


maximal shaft displacement axial ± 0,5 mm

maximal shaft displacement parallel ± 2 mm per meter

stainless steel

• customized length from 0,5 upto 5m

• backlash free, very precise torque transmission

• simple installation, splitted hub design

• stainless version, maintenance- and wear free

Material:

- intermediate pipe : high tensile steel 1.4301

- hub : stainless steel 1.4301


Notice: -Connection between bellows and hub: plasma welding- process

- size WBS 1000 for request

Membrane coupling Series WBA / WBSwith intermediate pipe

L

WBA 40

WBS 25

WBA 20

WBA 160W

BA80W

BS125

WBS

250W

BA32

0WBS

500

total weight (kg)

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

0 1.000 2.000 3.000 4.000 5.000(mm)

WBS 50

WBA 20

WBA 40WBS 25

WBA 80

WBA 160

WBS 50

WBA 320WBS

125

WBS

250

WBS

500

100

90

80

706560

55

50

45

40

35

30

25

20

15

10

5

0(mm)5.0004.0003.0002.0001.0000

-3moment of inertia (10 kgm²)

L

WBS 250

WBS 125WBA 320

WBS

500

WBA 20

WBS

25

torsional stiffness (Nm/arcmin)

WBS 5080/

WBA

160

WBA 40

(mm)5.0004.0003.0002.0001.00000

2,5

5

7,5

10

12,5

15

17,5

20

22,5

2527,5

30

35

40

45

505560

(mm)5.0004.0003.0002.0001.00000

max. speed (rpm)

1.000

2.000

3.000

4.000

5.000

6.000

7.000

0

1.000

2.000

3.000

4.000

5.000

6.000

7.000

8.0009.000

L

WBA

20

40

320

160

80

WBS

25

50

125

250

500

Length depentend technical data:

Servocouplings


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