ENEMAC GmbH Daimler Ring 42 63839 Kleinwallstadt GERMANYinfo@enemac.de

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MechanicalMechanicalclamping elementsclamping elements

Content

General

Power clamping nut ESB description

Power clamping nut ESB technical data

Power clamping nut ESD with through hole thread

Power clamping nut ESBS / ESBT

Power clamping screw ESS description

Power clamping screw ESS technical data

Slide-in clamp ESSE

Spring clamping cylinder ESZS description

Spring clamping cylinder ESZS technical data

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Cla

mpi

ng e

lem

ents

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Efficient manufacturing of parts in the metal-cutting and metal-forming industry is inconceivable today without quick clamping elements. The requirements go nowadays far beyond the handling and operation capacity of conventional clamping elements, since higher gripping power and more flexibility due to smaller lot sizes are demanded.Quick clamping units are a must to improve the quality, to gain rationalization and to humanize the work place.The mechanical clamping elements of ENEMAC meet these requirements perfectly, due to theirdifferent patented force amplifying systems. They are a true alternative as well to the conventional clamping elements as to the expensive half or fully automated clamping systems.

Scale comparison: application example - tool holderGripping power per element 60 - 100 kN Clamping height h = 40 - 50 mm T-slot width m = 28 mm

Clamping nutType ESB 100 - M 24Gripping power: 100 kNHolding force: 200 kN

Special characteristics• high gripping power - low tightening torques - large clamping strokes • high operational safety due to self-locking• improved technology for economical clamping• humanizing of the workplace - reduced danger of accidents• simple manual operation - easy installation• gripping power check due to defined tightening torques• versatile application due to compact, flexible design

Clamping elements general

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Clamping nutType ESD 100 - M 24Gripping power: 100 kNHolding force: 200 kN

Slide-in clampType ESSE 60 - 60 - 28Gripping power: 60 kNHolding force: 120 kN

Hydro-mechanical clamping systemType ESZS 6300Gripping power: 63 kNHolding force: 63 kN

Whether as standard equipment or as retrofit for machine tools, presses, stamping machines etc. ENEMAC clamping units keep tool and workpiece reliably in position.

The salient design feature of the mechanical powerclamping nut ESB + ESD is an integrated planetarygearbox for the multiplication of the manual tighteningtorque. Therefore, the user has a sturdy and flexibleclamping element, which enables highest grippingpower with simple manual operating and maximum ope-rating safety. The ESB with blindhole thread and centri-cal aranged operating hexagonal bolt, the ESD withthrough hole thread and on the side operating hexago-nal bolt.Both types can be used for various clamping tasksthroughout the machine tool industry, particularly for dieclamping in presses and punches.

maximum gripping power due to force amplification - simple manual operationlow tightening torques - high operation safety due to selflockingcorrosion-resisting, sturdy, up to 400°C

Power clamping nut Type ESB + ESD

ESB ESD

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Application example:workpiece-clamping on a machiningcentre table with ESB clamping nut

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Application example:Power clamping nut ESBfor tool clamping

Special options:- high temperature version up to 400°C

(e. g. Forging presses)- corrosion-resistant version for critical environmental

conditions- with additional engage-mechanic, for automatic

switching to clamping-force modus for quick infeedor for counterbored adjustment (standard for ESB 60, ESBT and ESBS)

- foodstuffs grease for food industry, laboratory e. g.- with additional grease nipple- second hexagonal bolt (only for type ESD)

Function and handling:After the manual equipping of the clamping nut to theseating, the drive pinion will be activated throug clock-wise turning of the hexagon bolt SW1 respectivelySW2. Resulting from the gearing the clamping torqueis multiplied several times and the rotation of thethreaded nut causes the clamping-hub of the inscr-ewed bolt. Reliant on the operation torque the clam-ping force will be set up. Self-locking is guaranted inevery position. We suggest the use of a torque wrenchto assure the needed clamping force an to protect thegear from damage. On some conditions the use of common boxwrenchesand socket keys or ratchet wrenches can also be ok.Assure that the in-screwed bolt is fixed, that means itdoesn't rotate simultaneously. Under normal conditi-ons the clampin nuts are free of maintenance. Bodyand threaded nut are protected from corrosion by sur-face-nitration.

Technical data and dimensions: (mm) length dimensions according to DIN ISO 2768 mH

Ordering example: Clamping nut ESB 100 - M 24 incl. T-bolt ESB 150 - 26 - 60 - 40

Series and size (max. clamping force 100 kN)T-slot dimension according to DIN 650 (dimension “m”=36 mm) Clamping height (“h” = 60 mm) Size of T-slot (“H” = 40 mm)

Power clamping nut Type ESB

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Table surface

T-slot screwDIN 787

up to M24:10.9/12.9

from M30: 8.8

with blind hole thread - thread protected - centrical operation - compact design

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ESBnominal thread max. max. T-slot - DIN 650 weight screw-in depthgripping tightening static

“ m ” ” H ” approx. Ø a Ø d1 Ø d2 L “ t ” SW1 wpower D * torque load

Size [kN] [Nm] [kN] min / max [kg] min max

M 12 20 70 14 14 / 19 60 60 M 16 25 120 18 18 / 24 0,9 62 32 60 50 16 24 13 10

M 20 30 120 22 22 / 29M 16 35 130 18 18 / 24

100 100 M 20 40 200 22 22 / 29 1,8 73 42 71 70 25 35 15 10M 24 45 200 28 28 / 36M 30 50 200 36 36 / 46M 24 60 300 28 28 / 36 2,5

150 150 M 30 70 300 36 36 / 46 2,4 83 52 81 75 30 40 17 12M 36 75 300 42 42 / 53 2,3M 42 80 300 48 48 / 59 2,2M 36 120 400 42 42 / 53 4,9M 42 125 450 48 48 / 59 4,8

200 200 M 48 130 450 54 54 / 66 4,7 120 82 118 80 35 45 17 12M 56 140 500 - - 4,5

* Property class of threaded bolt up to M24 minimum Q10.9; from M30 Q8.8 (further thread sizes e.g. inches on request)temperature range: from -30°C to 200°C

Technical data and dimensions: (mm) length dimensions according to DIN ISO 2768 mH

with through hole thread - for variable clamping edges - unlimited clamping stroke

Power clamping nut Type ESD

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Table surface

T-slot screwDIN 787

to M24: 10.9/12.9from M30: 8.8

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ESDNominal thread max. max. T-slot - DIN 650 weightgripping tightening static

“ m ” ” H ” approx. Ø a Ø d1 Ø d2 e L tmin SW 1 /SW 2 wpower D * force load

Size [kN] [Nm] [kN] min / max [kg] outside/ inside

M16 55 130 18 18/24 2,9

100 100M20 60 200 22 22/29 2,9

84 48 82 26,5 77 30 17 8 12M24 65 200 28 28/36 2,8M30 70 200 36 36/46 2,8M24 90 300 28 28/36 5,2M30 100 300 36 36/46 5,0

150 150 M36 110 400 42 42/53 4,9105 63 103 35 91,5 50 17 8 12

M42 115 450 48 48/59 4,8M48 125 450 54 54/66 4,7

Ordering example: Clamping nut ESD 100 - M 24 incl. T-bolt ESD 150 - 36 - 60 - 40

Series and size (max. clamping force 100 kN)T-slot dimension according to DIN 650 (dimension “m”=36 mm) Clamping height (“h” = 60 mm) Size of T-slot (“H” = 40 mm)

* Property class of threaded bolt up to M24 minimum Q10.9; from M30 Q8.8 (further thread sizes e.g. inches on request)temperature range: from -30°C to 200°C

Clamping nut ESBSwith star grip

Clamping nut ESBTwith T-grip

simple, manual operating with grip - fast feed motion due to automatic change over

Power clamping nut Type ESBS / ESBT

Ratchet Ratchet

Technical data and dimensions: (mm) Length dimensions according to DIN ISO 2768 mH

Ordering example: ESBS - M10 or ESBT - M16

Notice:Property class of threaded bolt should be at least Q10.9. Sizesof thread smaller than M 16, should be used with a propertyclass of Q 12.9, or the maximum static load must be reduced.For optical control of actual screw-in depth of the T-bolt twogrooves have beeb provided on the housing circumference mat-ching min. and max.. When laying out the actual screw-in depthof the threaded bolt, the necessary stroke must be consideredi. e. the max. specified screw-in depth must be reduced at leastby amount the stroke.

Application ESBT

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Nominal max. static screw in depth weightType gripping power thread load t min t max approx.

[kN] [kN] [mm] [kg]M 10 50

ESBS 40 M 12 70ESBT M 16 120 16 24 1,0

M 20 120

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wedge mechanism as force amplifier - high gripping powerlow tightening torque - simple manual operation

FunctionThe wedge clamping system of the ESS clampingscrew is self-locking in each clamping position, dueto its geometry, and offers a clamping stroke of up to3 mm. This way, dependent on tightening torque,very high clamping forces up to the nominal grippingpower can be achieved.

Clamping ProcedureThe infeed of the clamping screw down to a solidcontact with the part to be clamped (7) is the firststep, done by manually turning the housing (1)clockwise. Only then the hexagon of the actuationspindle (2) should be turned clockwise, thus movingthe forced-in key (3) in axial direction and pressingthe slide gores (4) in radial direction. The latter moti-on results in the axial stroke of the thrust piece (5)against the part to be clamped (7). The grippingpower is lead over the gorebedding (6) through the housing (1) into the yoke ofthe clamping devise (8).After approximately two turns of the actuation hexa-gon the travel of the thrust piece will be blocked byan internal positive stop and the torque wrench willdisengage although the required clamping force hasnot been generated; the clamping operation has tobe repeated. The clamping travel “s” is indicated asoptional clamping motion control. The maximal clam-ping position is reached when the lower cylindricalportion of the actuation hexagon is even with the topof the housing (Fig. A2).

Release The release procedure is carried out in reverseorder. By turning the operating hexagon to the left upto the fixed back stop (Fig. A1), the wedge slidemoves back and the clamping mechanism is relea-sed. Coil springs push the pressure piece and thewedges back into the starting position.

The clamping screws of type ESS are equipped with apatented wedge clamping system as a force amplifier.This newly developed system enables highest grippingpower with low tightening torques, simple manual operation and high operating safety. The clampingscrews type ESS have various application possibilities,mainly in presses, punches and machine tools, as wellas in jigs, fixtures and similar devices.

Power clamping screw Type ESS

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ReleasepositionFig. A1

max. clampingpositionFig. A2

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Technical data and dimensions: (mm) length dimensions according to DIN ISO 2768 mH

ESS

ENEMAC

sL1

L

Ø d

D

SW1

SW2

Ordering example: ESS 48

F (kN)

MA

20

40

60

80

100

120

140

20 40 60 80 100 120 140 160 (Nm)

Note: To reliably ensure the required gripping power on theone hand, and on the other hand to protect the drive orclamping mechanism against damages through excesstightening torque, we recommend the use of a torque wrench for applying the actuation torque.

With certain preconditions clamping is also acceptable with the usual ring or socket wrench.

The clamping screws are lubricated for life and maintenancefree under normal operating conditions.

Gripping power diagram ESS 64

Application example:clamping screw ESSlathe tool clamping on big lathe

Power clamping screw Type ESS

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max. temperature range: from -40°C to +250°C, high temperature version up to +400°C possible on request* further sizes and threads (inch thread) are possible on request** hexagon socket operating pin length: s = 17 mm

ESSnominal max. max. max. operatingclamping tightening clamping static path mass thread

force torque stroke load “s” approx.. D*Ø d L1 L SW1 SW2

size [kN] [Nm] [mm] [kN] [mm] [kg] [mm] [mm] [mm] [mm] [mm] [mm]

36 40 45 1,5 80 5 0,5 M 36x3 19 62 73 13 30

48 80 90 2,2 160 7,5 1,1 M 48x3 28 75 90 17 41

64 120 120 2,5 240 8,5 2,5 M 64x4 39 90 110 19 55

80 160 160 2,5 320 8,5 5,3 M 80x4 39 100 160 19 65

100 250 130 3 400 17 12 TR 100x6 60 205 230 17** 65

Type

Size (nominal clamping power 60 kN)

clamping height h (clamping range approx.15 - 40mm)

T-slot size according to DIN 650 (dimension “m” = 22mm)

Technical data:

* Further T-slot dimensions on request

Ordering example: ESSE 60 - 40 - 22

versatile application - flexible, rotable head piecesimple manual operation - high gripping powerThe mechanical slide-in clamp of series ESSE is a combination of a T-slot slide-in unit with a mechanical clamping screw of seriesESS. This flexible and sturdy clamping element represents a cost-effective alternative to semi or fully automated clamping systems,mainly for tool clamping on presses and punches. The ESSE unit is positioned by sliding it into the T-slot and swivelling of the bracket if necessary. The quick tightening of the socket head cap bolt completes this step. The infeed of the clam-ping screw until solid contact of all clamping surfaces is the next step. Only the hexagon of the actuation spindle should be turnedclockwise to generate the gripping power. The bracket with clamping screw and distance plate can be screwed down without t-slotfixtures directly on supporting tables. The ESSE can be used as a fixed stop too.

LH

min

/m

ax

min

/m

ax

clamping screw

type ESS

T-slot

long form

DIN 508

table level

a

e

stravel

hc

max.cla

mpin

gheig

ht

SW1SW2

SW3

fb

m

d

D

Dimensions: (mm)

* Standard range for clamping height “h”; special clamping heights on request

Slide-in clamp Type ESSE

ESSEa b c

d threade f h+1*

LSW1 SW2 SW3

Size (Q12.9) D min max 30 100 120

30 90 50 40 M 16 M 36 x 3 40 21 50 120 142 13 30 14 70 140 16240 125 150

60 113 60 50 M 20 M 48 x 3 53 28 60 145 170 17 41 17 80 165 19050 145 180

100 150 80 60 M 24 M 64 x 4 70 37 80 175 210 19 55 19

10 KW: 43/09

ESSE Nominal max. tightening max. max. static max. weight T-slot * - DIN 650gripping power torque Clamping stroke load adjusting path m H

Size [kN] [Nm] [mm] [kN] “s” approx. [kg] min/max

30 30 35 1,5 60 22 318 18/2422 22/29

60 60 80 2,2 120 25 522 22/2928 28/36

100 100 130 2,5 200 35 828 28/36 36 36/46

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mechanical clamping, hydraulic releasing - high operation safety, leakproof and robusteconomical clamping solution

GeneralThe piston assembly works in interaction mechanic-hydraulic. This means that the cup spring packet iscompressed more with increasing pressure. Thehydraulic pressure is required only for the releasestroke of the elements whereby the pull stud piece isreleased.This System ensures a very high factor ofsafety since the clamping force generated is indepen-dent from the oil pressure and from pressure loss dueto leakage and this means also economical advantage.

The full clamping force remains constant at all times.The short operating cycle times of the hydraulic powerpack additionally save on costs and make it more eco-nomical. The spring clamping cylinders of the seriesESZS are robust and reliable elements which can beused in all applications where moveable machine parts(eg. fixtures, dies etc.) need to be clamped orlocked into position. They are also used in workpieceand tool clamping operations.

Principal of operationThe piston is subjected alternately to cup springspring force or the hydraulic pressure. This means, thatas the spring assembly is pressed together with incre-asing pressure, the spring force increases. At setting pressure, the appropriate nominal clampingforce is achieved as reaction force of the cup springassembly. For release a higher hydraulic pressure isrequired, which is proportional to the release strokeup to a maximum value. The appropriate pressurevalues can be found in the tables.

With spring clamping cylinders, a clamping bolt or pullstud is screwed into the threaded bore of the pistonadjusted and secured (on request also suppliedas one piece with special thread). The required hydrau-lic assembly should be equipped with a pressure limi-ting valve, a switching-magnetic valve, a pressuregauge and a pressure switch unit. The pull stud is anti-twist guarded through a connection of the extruder-bar-rel brad.

Fitting and adjustment• slide cylinder into the locating hole provided (do not install), and make hydraulic connection• bleed cylinder and pipe line at low pressure (cylinder will be delivered empty)• increase system pressure and hold; align the cylinder with the aid of ring nut, do the fine setting until the

piston or clamping piece, backlashfree rests in place; secure pressure cylinder with cheese-head screw or secure the ring nut of the spring clamp cylinder

• drain system pressure; set release pressure for the required release stroke; check release stoke and adjust if necessary

If an automated clamping-handling is not necessary, than the temporaire, manual hydraulic-connection a hand-pump with monometer is a economic alternative (see picture on the left).

Spring clamping cylinder Type ESZS

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11 KW: 43/09

manometer

piston pump

bleed screw ring-nut spring clamping system

pull studconnection piecewith clamping piece

slide

machine bed

quick-connectcoupling

Technical data:

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

Ordering example: ESZS 25.000 or ESZS 10.000 - 2

Oa

G1/4

Ob

G1/4

5

e

v

g

L

ft

M

Oc

ODf7

Material:- heattreated steel

black finish

Note to “version-2”: The sizes 1.600 to 10.000 are available alternatively with smaller external diameter “D” cylinder housing according to column “-2”.

Spring clamping cylinder Type ESZS

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bleed screw

ESZS Ø Df7“vers-2”

Ø a Ø b Ø c e f g L M t vadjusting thread

Size Ø Df7 ring-nut

1.600 60 55 85 55 20 40 14 12 101 M 14 x 1,5 24 22 M 58 x 1,5

2.500 70 65 95 65 25 46 14 13 111 M 18 x 1,5 30 23 M 68 x 1,5

4.000 80 75 110 75 30 56 16 12 125 M 22 x 1,5 36 24 M 78 x 1,5

6.300 95 85 125 89 40 67 16 12 135 M 30 x 1,5 48 28 M 92 x 1,5

10.000 105 95 140 100 40 78 16 18,5 150 M 30 x 1,5 50 35 M 102 x 1,5

16.000 142 130 180 137 50 75 32 22 170 M 38 x 1,5 50 50 M 140 x 2

20.000 150 - 190 143 57 92 40 22 200 M 45 x 1,5 60 58 M 148 x 3

25.000 170 - 220 163 70 100 40 22 230 M 45 x 1,5 60 58 M 168 x 3

35.000 200 - 250 192 80 100 45 47 240 M 52 x 1,5 70 65 M 198 x 3

ESZS nominal adjusting max.release release pressure release pressure release pressure stroke volume weightclamping force pressure stroke at 0,5 mm stroke at 1,0 mm stroke at max. stroke at 1 mm stroke approx.

Size [kN] [bar] [mm] [bar] [bar] [bar] [cm3] [kg]

1.600 16 135 2,0 170 210 290 1,3 2,0

2.500 25 135 1,6 160 185 230 2,0 3,0

4.000 40 150 2,0 170 190 240 2,8 4,5

6.300 63 175 1,5 190 210 235 3,8 6,8

10.000 100 210 1,5 250 280 320 5,0 8,5

16.000 160 210 1,2 240 275 295 7,9 21

20.000 200 210 1,2 240 270 290 11,3 26,5

25.000 250 190 1,6 210 235 260 14,3 41

35.000 350 190 1,0 210 230 - 20,1 60

temperature range: from -30°C to 200°C, fitting position: user-defined