d 87 polyma a m y p - jrm international...

Developed back in the early Fifties forclamping milling cutters on horizontalmilling machines.

Simply screw on clamping element inplace of mechanical nut . The self-con-tained hydraulic system is actuated bytightening the pressure screw on theend face by hand, gripping the knurledpart of the screw sleeve, or by using aT-hand-led wrench. The parts to be clam-ped are pressed together by a strong,purely axial force, but remain securely inposition due to the absence of any radialor transverse forces.

The hydraulic cushioned clamping sur-face compensates for any axial run-out,and the axial clamping mechanism is notinfluenced by the precision of the screwthread and clamping surface.

Milling cutters without keys are clampedby frictional engagement, thus ensuring aperfect driving effect . The clamping forceis many times that of the mechanical nut .

Adaptation to the arbor thread and dia-meter is possible using conversion parts.

D 87

POLYMA

Hydraulic lock nut 89

PPO

LYM

A

ALBERT SCHREMWerkzeugfabrik GmbH

Ulmer Straße 56 . D-89537 Giengen/Brenz

PO Box 1504 . D-89530 Giengen/Brenz

Telephone +49 (0) 73 22-60 06 . Telefax +49 (0) 73 22-60 08

[email protected] . www.schrem-tools.comPOLYMA

Hydraulic lock nut 89

Technical Data

Order No. Arbor diameter to

Max. clamping force

Order No. Dimensions (mm)

mm inch

Ø D Ø d1 Ø d2 L L1

kN lbs

Please specify arbor O.D. and thread when ordering.

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

89-10089-200

3250

1.252.0

120150

2640033000

89-10089-200

to 32to 50

4141

6583

150 97115190

Workpieces are clamped by multiply-ing the pressing force of the machinehydraulics.

Screw on power transmission element byhand. The steady pressure is determinedby the machine hydraulics, the force in-ducted actuates the cylindrical pins. Whenpressure is applied to these pins, the self-contained hydraulic system of the powertransmission element is actuated.

The magnitude of the purely axial clam-ping force is determined by the transmis-sion ratio and the pressure of the machi-ne hydraulics, and can easily amount tomany times the purely mechanical clam-ping force. No radial forces are generated,so that the parts to be clamped remainaligned in their set positions. The strokeof the clamping piston is limited to approx.0,5 mm (0.02 inch).

The clamping force is dependent of thescrew thread, and the extra tools requiredby mechanical clamping devices, such aswrench extensions or hammers, can beeliminated.

Depending on the requirements and framesize, the system can also be supplied witha hydraulic resetting mechanism.VV

AR

IO

VARIO-POLYMA

Hydraulic power transmission element 97

PO

LYM

A





[email protected] . www.schrem-tools.comVARIO-POLYMA

Hydraulic power transmission element 97

Technical Data

Order No. Threaddiameter to


Transformation ratio

mm inch

Ø D Ø d1 Ø d2 L

Please specify thread when ordering.

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

50 2134 41

L1

1115 9

97-10097-200

5:17:1

97-10097-200

to 14to 20

40 15Ø d3

3222

Ø d4

4430

Ø d5

75 9

L2

1420

0.5000.750

0n the basis of our experience with thehydraulic lock nut POLYMA-ADJUSTA NoDAKK92 and the equal iz ing wedges usedthere, the development of this purelymechanical al ignment r ing was obvious.

Operation of the Alignment Ring AK76:Pick up hob, al ignment r ing, spacer r ingetc on the cutting arbor as usual,

Obtain the desired purely axial c lampingforce according to the clamping forceindicator by means of the hydraul ic locknut.

o Test the concentricity of the hob.

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Start ing with the concentr ic i ty minima,correct the reading up to 50% by usingthe al ignment segments.

Continue to carry out any necessary cor-rections of the hob concentricity unti lthe required value is achieved.

When choosing the al ignment r ing, pleasetake into account:The arbor-a and cutter/hob or soacerr ing-outside should correspond to mea-surements D and d , ,l f th is is not possible, the fol lowing rule ofthumb should be app l ied, when choos ingthe appropr iate al ignment:

Cutter/Spacer outside dia meter=d, +/-5 m m

Operation of the Alignment Nut AK76-8..:

o P ick up hob, spacer r ing, a l ignment nutetc on the cutt ing arbor as usual.

o T ighten a l ignment nut w i th an openended spanner (SW19) .

o Test the concentricity of the hob.o Start ing with the concentr ic i ty minima,

correct the reading up to 50% by usingthe a l ignment segments ,

Continue to carry out any necessary cor-rections of the hob concentricity unti lthe required value is achieved,


Ulmer StraBe 56 D-89537 Giengen lBrenz

P0 Box 1504 . D-89530 Giengen/Brenz

Telephone +49 (0) 7322-6006 'Telefax +49 (0) 7322-6008

i nfo @sch rem-tools.co m . www.sch rem -too ls.co m

Technical Data Order specif icat ions for Al ignment Ring No, AK76:

Order-No. Arbor-Omm

Outer-Omm

AK76-025 8t10t- 25AK76-036 - t13 t16 36AK76-042 16/22t27 A '

A L

AK76-052 22t27 t32 52AK76-057 22t27 t32 6 1

AK76-065 21t32t40 6 5AK76-073 32t40t50 t 5

AK76-085 40t50t60 8 5AK76-105 50/60/80 105AK76-150 60/80/100 1 5 0

Order specif icat ions for Al ignment Nut No. AK76-8.

Order-No. Thread Outer-Om m

AK76-808 M 8x0,75 2 5AK76-810 M 10x0,75

Dimensions

Order-No. Dimensions (mm)g D @ d , L

AK76-025 .Bt10t- ' ) R 20AK76-036 - t13 t16 36 20AK76-042 16t22/27 42 20AK76-052 16t22t27 6 ) 20AK76-057 22/27 t32 5 l 20AK76-065 27 t32t40 65 20AK76-073 32t40t50 73 20AK76-085 40t50t60 B5 20AK76-105 50/60/80 105 20AK76-150 60/80/100 150 20

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AK76-808 M 8x0,75 ' ) R 22AK76-810 M 10x0,75 25 22

Developed together with GLEASON-PFAUTER for the clamping of the hobcutters it is part of their work standardunder number WN41023.

Its outside diameter makes it possible todraw the outer boring over the lock nutso that the cutter arbor with preset hob-bing cutters can be changed in spite ofthe outer bearing being inside.

Screw on the lock nut hand-tight . The ac-tuation of the fully enclosed hydraulic sys-tem is effected by tightening the screwon the front . The height of the effective

more axial clamping depends on the cut-ter arbor and is supervised by the clam-ping pressure indicator. The clampingpressure is reached as soon as the redring indicator pin reaches the height ofthe golden insert . There exist no transverseforces causing a shifting on the hobbingcutter.

The reset of the lock nut with a pressureup to 120 kN (26400 lbs) is manuallyeffected with the internal screw thread.

For machines having a big outer bearing(arbor thread M42x1,5LH) the lock nutDK109-A300 is equipped with hydraulicresets. This makes operation easier andsafer, as with the release, the hydraulicsautomatically return to zero/initial position.

For the power of supply an Allen wrenchis needed. Big wrenches or wrench exten-sions are no longer used.PP

OLY

MA

POLYMA-THEKA

With clamping pressure indicator,hydraulic retract

Hydraulic lock nut D109/DK109

THEK

A





[email protected] . www.schrem-tools.comPOLYMA-THEKA

With clamping pressure indicator, hydraulic retract

Hydraulic lock nut D109/DK109

Technical Data

Order No.

1

Arbor diameter to

Max.clampingforce kN


Pressure indicator

mm inchMarked

ringClamping force

Ø D Ø d1 Ø d2 Ø d3 L L2L1

kN lbs

Please specify thread when ordering.

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

D109-A020D109-A060D109-A080D109-A100D109-A120DK109-A300

20243042

80100120300

0.7500.8751.1251.625

6080

100120300

1320017600220002640066000

1111

D109-A020D109-A060D109-A080D109-A100D109-A120DK109-A300

*L4 = untied screw

to 12to 16to 20to 24to 30to 42

57,557,557,557,557,581,5

525252525276

404040404060

117117117117117150

77 77 77 77 77 94

27 27 27 27 27 36

L3

38 38 38 38 38 54

L4*5 5 5 5 5 0

1216

0.5000.625

2060

1 20 4400

In the form of a screw.

Tighten screw by hand. The self-containedhydraulic system is actuated by tighteningthe pressure screw on the end face withan Allen wrench. The parts are clampedwith a strong, purely axial force. The effec-tive force is defined and monitored by theclamping pressure indicator on the endface. The hydraulically cushioned clampingsurface adapts to the par t to be clamped.

The pre-set concentricity is maintained,as no radial or transverse forces are gene-rated.

The pressure screw is actuated with anAllen wrench (size 6 mm); other aids,such as wrenches and hammers are not required.PP

OLY

MA

POLYMA-COCLEA

With clamping pressure indicator

Hydraulic clamping device D82

CO

CLE

A





[email protected] . www.schrem-tools.comPOLYMA-COCLEA



Technical Data

Order No. Threaddiameter



Pressure indicator

mm inchMarked

ringClamping force

Ø D Ø d1 Ø d2 L

kN lbs

Please specify diameter d2 and for D82-200 furtherdesired thread when ordering.

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

56

D82-A0... 40 11

40 8800

D82-A0... M22x1,5 46 to 125 26

75 D82-200 80 42

L1

M22x1,5

D82-200 80 1 17600D82-A1... 13200

806060

1,5M36x1,5

M22x1,5

to 40M36x1,5

D82-A1... 60 56 26to 40M36x1,5

to 125to 200

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Main application so far: clamping ofshaper eutters on a gear shaper.

The advantages of hydraulic shaper cut-ter adaptor clamping over the purely me-chanical solut ion are as fol lows:

r s igni f icant ly highel purely axial c lampingI0rce

r monitored, defined clamping force byclamping pressure indicator

r ho radial or transverse forces to displacethe cutter position

r force induction by Allen wrencho nut or screw for t ightening shaper cutter

only needs to be hand-tightened

r no need for extended wrenches in mostlycramped conditions

r no risk of injury through slippage of thewrench of spanner wrench

o easier operation and reduced setup times

Depending on the required degree of pre-cision, the following versions are availab-le:

D83: Hydraulically reinforced, purely axi-al shaper cutter clamp, checked and mo-nitored by clamping pressure indicator.

DA83: As for DB3, but with additional fa-ci l i ty for al igning concentr ic i ty by radial lyintegrated adjusting screws,

DZ83: As for DB3, but wi th addit ional hv-draul ic expanding arbor for c lose-f i t t ing,opt imal bore-ho le mount ing.

DAZ83: Combinat ion of the above threealternatives, i,e, hydraulically reinforced axi-a l c lamp, a l ignment o f ho ld ing f ix ture byadjust ing screws and opt imal bore cente-r ing by hydraul ic expanding arbor,

Due to the lack of universal standards, i tis only possible to descr ibe basic design0Otr0ns 0n reverse.

Data needed for designing a hydraul iccutter tool adaptor are:A drawing of the previously used mecha-nical cutt ing tool c lamp or a drawing ofthe machine sp ind le a t wh ich the fo l lo -wing general versions are possible:

r straight shank with fastening screwsr steep taper or HSK in standard or manu-

facturer-speci f ic design depending onwork p ieces and machine work ho ld ingf ixture,

Modular solut ions are oossible to sui t theamount of space avai lable. In this way,parts of assembl ies can be subst i tuted orexchanged according to the degree ofwear or the cutt ino wheel used.

D83:Tool clamp with hydraulically reinforced, purely axial clampingforce and clamping pressure indicator,

DZ83:Tool c lamp with hydraul ical ly reinforced, purely axial c lampingforce and clamping pressure indicator plus hydraul ic expan-ding arbor for optimal mounting of tool in bore-hole,


Ulmer StraBe 56 . D-89537 Giengen lBrenz


Telephone +49 (0) 7322-6006 .Telefax +49 (0) 7322-6008

i nfo @sch rem-tools.co m . www.sch rem -too ls.co m

DA83:Tool c lamp with hydraul ical ly reinforced, purely axiac lamping force and c lamping pressure ind icator p lusconcentr ic i ty al igning faci l i ty for mount ing the cutter inthe machine. This al lows correct ion of an axial run-outdue to the c lamp and machine sp ind le ,

DAZ83:Tool c lamping with hydraul ical ly reinforced, purely axialc lamping force and c lamping pressure ind icator p lusfaci l i ty for al igning the clamp and center ing the cutt ingwheel opt imal ly v ia a hydraul ic expanding arbor.

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Mainly for clamping workpieces to-gether with clamp and mechanical nut.

The self-contained nature of the hydraulicunit makes it very versatile. The hydraulicclamping element is placed on the clam-ping screw before the mechanical nut .Tighten the mechanical nut by hand. Ac-tuate the self-contained hydraulic systemby tightening the radial screw (max. size17 mm).

The magnitude of the purely axial forcecan be adjusted and monitored by themulti-stage clamping pressure indicator.

The clamping pressure indicator is posi-tioned at an angle of 75° to the pressureinduction point . If necessary, the calibrati-on of the clamping force can be alteredat the factory.

Due to the closed hydraulic system, thestroke of the annular piston is limited toapprox. 4 mm (0.157 inch), but a largerstroke is also available on request .

The use of these hydraulic clamping ele-ments represents a genuine contributionto accident prevention and labour saving,as the clamping pressure amounts to ma-ny times the force obtainable by purelymechanical means. The extra tools asso-ciated with mechanical workpiece clamp,such as wrench extensions and hammers,can be eliminated.

The device is a "must” when clampinglarger workpieces.PP

OLY

MA

POLYMA-MAGNA



MA

GN

A





[email protected] . www.schrem-tools.comPOLYMA-MAGNA



Technical Data

Order No.

2

Diameter Max.clampingforce kN


Pressure indicator

mm inchMarked

ringClamping force

Ø D Ø d1 Ø d2 Ø d3 H L2L1

kN lbs

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

D87-010

D87-110

D87-210

31

43

180

250

1.125

1.625

10060

10018060

150250

22000132002200039600132003300055000

123123

D87-010D87-110D87-210

233143

6090

110

506585

304565

Ø d4

283035

49 150138172

120178220

23 0.875 100 1 60 13200

6459

Mainly used as a spacer ring.

The mechanical nut is still necessary, butonly has to be tightened by hand. The pu-rely axial clamping force is generated bytightening the peripheral screws, thus ac-tuating the self-contained hydraulic sys-tem. The clamping force thus generatedamounts to many times the force obtain-able by purely mechanical means. Themagnitude of the clamping pressure isadjusted and monitored by means of thebuilt-in-multi-stage clamping pressure in-dicator.

On request, the graduation and maximumforce can be reduced.

Any axial run-out is compensated for bythe hydraulically cushioned clamping sur-face, the parts remain securely in positi-on due to the absence of any radial ortransverse forces. Conventional aids, suchas wrench extensions or hammers, canbe eliminated.

Smaller arbor diameters can be accom-modated using your own spacers, thusmaking the device even more versatile.PP

OLY

MA

POLYMA-NOVA



NO

VA





[email protected] . www.schrem-tools.comPOLYMA-NOVA



Technical Data

Order No.

2

Arbor diameter to



Pressure indicator

mm inchMarked

ringClamping force

Ø D Ø d1 Ø d2 Ø d3 L L2L1

kN lbs

Please specify arbor O.D. or thread when ordering.

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

D88-100

D88-200 50 1602.0

D88-300 80 1603.125

12060

10016060

100160

26400132002200035200132002200035200

60 132002640012044000200

1231231231

264001202

D88-300D88-400D88-500

to 50to 80to 110to 120

85115132160

95125150170

170

212

32 1.25 120 1 60 13200

60 13200

110 2004.25D88-400

440002003

D88-100 to 32 65 75 122 5252525252

27 27 27 27 27

44 44 44 44 46

140D88-200

200

D88-500 120 2004.75

Obtained by installing a clampingpressure indicator in the hydrauliclock nut POLYMA.

Screw hydraulic lock nut by hand ontothe end of the arbor in place of the me-chanical nut . Series of tests at customersfactories have shown, that in the case ofgear hobbing machines – depending onthe required degree of precision – thereis no need to align the hob cutter. Thegear hob can be aligned quickly and easi-ly as the need arises, since the hydrauliclock nut is only hand-tightened.

The self-contained hydraulic system is ac-tuated by tightening the pressure screwon the end face using the supplied wrench.The magnitude of the effective axial forceis adjusted and monitored by the 2-stageclamping pressure indicator. The parts tobe clamped are pressed together by thepurely axial thrust on the hydraulic piston.

Since no radial or transverse forces aregenerated during the clamping process,the set degree of concentricity is maintai-ned throughout the edge life of the mil-ling cutter.

This ensures an improved machining re-sult and shorter machining times duringsubsequent operations, as well as pro-longation of the edge life. Depending onthe application, it is possible to dispensewith the key coupling and so avoid da-mage to the cutter arbor. The cutter is easyto change and there is no need for thecustomary extended wrenches or ham-mers, thus help-ing to reduce setup timeand prevent accidents.

Conversion parts are available for adap-ting the hydraulic lock nut to the arborthread and diameter.PP

OLY

MA

POLYMA-PRIMA


Hydraulic lock nut D89

PR

IMA





[email protected] . www.schrem-tools.comPOLYMA-PRIMA


Hydraulic lock nut D89

Technical Data

Order No. Arbor diameter to



Pressure indicator

mm inchMarked

ringClamping force

Ø D Ø d1 Ø d2 L

kN lbs


Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

D89-200

*L2 = untied screw

50 83140 155

L1

100 115 7

D89-100 120 12

60120

100150

1320026400

D89-100 to 32to 50

50 65 7L2*

32 1.25

D89-200 150 60 132002200033000

123

2.050

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This dimension series was promptedby the widespread demand for coun-tersunk pressure screws.

The strong, purely axial, defined and mo-nitored clamping pressure {by comparisonwith the mechanical clamping nut) is en-sured by the self-contained hydraulicsystem.

the parts to press together by a purelyaxial power.

The hydrau l ica l ly cush ioned c lampingsurface adapts to the opposite surfaceand clamps the part wi th a secure, def i -ned axial power, The magnitude of theeffective axial power is adjusted and mo-ni tored by the mult i -stage clamping pres-sure indicator. l f necessary the cal ibrat ionof the clamping pressure can be al teredat the factory.

The transverse power which is inevitablygenerated with mechanical c lamping, andwhich causes the parts to be displaced,does not occur with this lock nut, and ore-set concentr ic i ty is maintained through-out the edge l ife of the cutter, Thus, en-sur ing better machining resul ts and shor-ter t imes for f in ishing operat ions.

Large wrench extensions and hammersare a thing of the past. A genuine contr i -but ion to reduced setup t imes, accidentprevent ion and labour saving,

Tighten the hydraul ic lock nut by handand actuate the self-contained hydraulicsystem by tightening the two pressurescrews on the end face with an Allenwrench. The hydraulic pressure causes




Telephone +49 (0) 7322-6006 Telefax +49 (0) 7322-6008

i nfo@sch rem-tools.com . www.sch rem -tools.com

Order No. Arbordiameter tomm I inch


PrMarkedl

rrng l

'essure indicatorClamping force

kN I lbsD91-424 24 0 937 40 1 20 4400

2 40 BBOOD91-A32 5 1 1 .25 60 1 30 6600

2 60 r3200D9i-A40 40 1 5 150 1 60 r3200

2 100 22000J 1 5 0 33000

D91-A50 50 2 0 1 5 0 1 60 13200nL 100 22000J r50 33000

D91-460 60 2.375 200 1 60 132002 100 22000

200 44000D91-ABO BO 3125 250 I 60 1 3200

a 150 330003 250 55000

Technical Data

Dimensions

Please specify arbor thread when ordering.

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d z

Order No. Dimensions {mm)g D 6 d r 6 d z @ d s @ d o L L1 L2

D91-A24 to 24 47 46 34 to 20 69 42 25D91-A32 to 32 5 7 5 6 A A IO 24 6 9 42 25D91-A40 to 40 69 61 56 to 30 95 5 5 3 5D91-A50 to 50 83 80 68 t0 42 95 5 5 35D91-460 to 60 98 9 5 80 to 52 B6 50 35D91-ABO to B0 1 1 8 115 100 to 68 B6 50 35

With this lock nut it is possible toachieve a strong, purely axial clam-ping force capable of being definedand monitored, even with the short-est lengths and end-on force induc-tion. Any axial run-out is compensa-ted for by the hydraulically cushionedclamping surface.

These are the main advantages by com-parison with mechanical c lamping. Tigh-ten the lock nut by hand and actuate theself-contained hydraulic system by tigh-tening the pressure screw on the endface. The pressure intensifier generates

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a force many t imes stronger than that ob-

]alnable by mechanical means.

The clamping power is steplessly adjust-able, but can be reduced on request, anddoes not generate any transverse forcest_o: displace the clamped parts.

The set degree of concentr ic i ty is main-tained throughout the machining process,The customary extended wrenches orhammers are not longer required - a s ig-ni f icant contr ibut ion to easier operat ions,reduced setup t imes and accident pre-vent ion.





i nfo @ sch re m -too ls.co m . www.sch rem -too ls.co m



PMarked

r ing

'essure indicatorClamping forcekN I lbs

091-100 32 l . c 1 5 0 60 132002 100 220003 150 33000

D91-200 50 2 2 5 1 5 0 1 60 1 3 2 0 0a 100 220003 r50 3 3000

D91-300 70 2.75 200 1 60 132002 100 220003 200 44000

D91-400 85 325 250 1 BO 17600,) 150 330003 250 55000

D91-500 100 4 125 250 1 BO 176002 150 330003 250 55000

D91-600 120 415 300 1 80 17600') 150 330003 300 66000

Technical Data Please specify arbor O.D. and thread when ordering

Dimensions

Order No. Dimensions {mm}g D @ d , @ d , a d s @ d o L L1 L2 Ls*

D9 100 l o J t 0 v 66 5 6 To 30 BO 44 3 5 ID9 200 to 50 B9 B6 l4 To 45 BO 44 3 5 BD9 300 to 70 109 106 B5 To 60 80 44 40 4D9 400 to Bb 122 120 100 To 75 BO 44 40 4D9 500 to 100 I J J 130 120 To 85 9 5 47 A A 4D9-600 to 120 1 5 0 141 132 To 100 9 5 41 A A 0

-13 = untied srew

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Extremely versatile hydraulic clampingdevice. It can be used as a nut, screwor spacer ring. For special applications,the annular clamping surface can beinwardly or outwardly adapted.

The pressure screws, positioned secantal-ly in the base frame, allow an extremelylow design. The self-contained hydraulicsystem is actuated by the pressure screws.The axial clamping power thus generatesamounts to many times being obtainableby mechanical means, regardless of themechanical prestressing.

The effective clamping pressure is adju-sted and monitored by what is usually a2-stage secantal clamping pressure indi-cator, according to the internal hydraulicpressure.

The hydraulic pressure does not generateany radial force, so that the parts remainin the aligned position. The hydraulicallycushioned clamping surface allows a se-cure, defined axial clamping pressure,even in the case of non-parallel par ts.The aids required for mechanical clam-ping, such as wrench, extensions andhammers are not required in the case,which means a further contribution tolabour saving, accident prevention andreduced setup times.PP

OLY

MA

POLYMA-MINORA



MIN

OR

A





[email protected] . www.schrem-tools.comPOLYMA-MINORA



Technical Data

Order No.

1

D92-1000 160 6.25 250 26400/55000120/250

D92-1000 to 160 200 180 220 47

Arbor diameter to



Pressure indicator

mm inchMarked

ringClamping force

Ø D Ø d1 Ø d2 Ø d3 L

kN lbs

Please specify arbor O.D. or thread when ordering.

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

D92-091D92-100

D92-300D92-400D92-500

D92-700D92-800D92-900

D92-200

D92-600

27324050607080

120140

50607080

100120150

1.01.251.52.02.3752.753.125

4.755.5

5030/6030/7040/8060/10060/12080/150

110001D92-084 24 500.75 50 11000

6600/132006600/154008800/1760013200/2200013200/2640017600/33000

100 2003.875 100/200 22000/44000200 22000/44000100/200250 26400/55000120/250

1/21/21/21/21/21/21/21/21/21/2

D92-080

D92-091D92-100D92-200D92-300D92-400D92-500D92-600D92-700D92-800D92-900

to 18

to 27to 32to 40to 50to 60to 70to 80to 100to 120to 140

34

5256627485

100120132160175

24

424050607085

105120138155

57

65707585

100119130150173198

30D92-084 to 24 52 42 60 33

33333333333333474747

D92-080 18 0.625 40 1 40 8800

Compared to the previous series redu-cible weight makes it even more ver-sati le.

0peration is extremely simple. Screw onthe hydraul ic lock nut by hand as youwould a mechanical nut. The sel f -con-tained hydraulic system is actuated by thepressure screw on the end face (or twopressure screws in the case of diame-ters from 42 mm or 1.625 inch upwards).

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The effect ive clamping pressure is adju-sted and monitored by the one-stagec lamping pressure ind icator on the endface, according to the bui l t -up internalhydlaul ic pressure.

The clamping process does not generateany transverse powers to displace theparts f rom their preset, a l igned posi t ion.The hydrau l ica l ly cush ioned c lampingsurface ensures a secure, def ined axialc lamping pressure enabl ing any minoraxial run-out to be comoensated for.

By setting bores on the end face (measu-res @ do x L/ the mass can be reducedand/or the hvdraul ic lock nut be balanced.

0ut - or inward ly adapted annular c lam-ping surfaces are also avai lable for spe-cial appl icat ions, whi le large, extendedwrenches can s imply be e l iminated.

The axial clamping pressure generatesamounts to many t imes being obtainableby mechanical means, regardless of themechanical pre-stressing.



PO Box 1504' D-89530 Giengen/Brenz

Telephone +49 (0) 7322-60 06 .Telefax +49 (0) 73

[email protected] . www.schrem-tools.com

22-6008-_=

Technical Data Please specify arbor 0.D. or thread when ordering

Dimensions


Max.clampingforce l<N

pl

Markedrrng

'essure indicatorClamping force

kN I lbsD93-0016 t 0 0 625 30 ,1 30 6600D93-0020 20 0 7 5 40 1 40 8800D93-0024 24 0 875 50 1 50 11000D93-0130 30 1.125 60 1 60 13200D93-0136 36 1 375 70 1 7A 15400D93-0142 42 1 625 80 1 80 17600D93-0152 52 2,0 100 1 r00 22000D93-0168 6B 2625 120 1 120 26400

Order No. Dimensions (mm)g D @ d r @ d , @ d s L L1 Lz* d4 L4

D93-0016 to 16 45 24 36 4l 24 4 32D93-0020 to 20 49 2B 40 50 l o 5 3 5D93-0024 to 24 5 5 J 1 46 52 2B 7D93-0130 to 30 0 l 38 52 66 30 7 41D93-0136 to 36 6 l 44 5B 68 J I 11 43D93-0142 to 42 B1 54 70 62 6 12,5 3 7D93-0152 to 52 91 64 80 6 5 32 7 12,5 40D93-0168 to 68 107 1B 94 66 35 10 12,5 41

.12 = untied screw

aC

'r=

Ctr

a)!

CD' .-C

a.)

o

=

:.:;:;;.:;:;:;:.:4;:;:;;;:;:;:;:;;':1

ffiffiWWWW@ffiWW ffi

extensions or spindle steadying devices,and no r isk of radial movements. Fort ighten ing and loosen ing the c lampingnut in enc losed app l ica t ions, a spec ia lwrench is ava i lab le (No D93-N28 20) ,which is engaged in the bores on theend face,

To clamp the grinding wheel on toothflank grinding machines.

The mechanical nut is s imply replacedby the hydraulic lock nut. The hydrauliclock nut serves to c lamp the gr indingwheel, independently how tightly the nutis screwed on by hand, with a defined,purely axial force, which is set and mo-ni tored by the clamping pressure indica-tor.

The force is built up by the self-contai-ned hydraulic system by tightening thescrews, so that there is no need for wrench

D93-N2B for REISHAUER Machines.D93-N30 for GLEASON /OKAMOTOMachines.



PO Box 1504 D-89530 Giengen/Brenz


i nfo @sch rem-tools.com . www,scn rem -tools.com

Technical Data

Dimensions

Order No. Arborthreadmm


Pr

prn


D93-N2B M2Bx'1 ,5 lH 30 o lane 30 6600D93-N30 lV30x1,5LH 30 p l a n e 30 6600

Order No. Dimensions {mm)g D @ d , @ d s @ d o L Lz*

D93-N28 2 8 70 50 62 38 6D93-N30 30 5 6 3 5 A A A A

-12 = untied screw

a D

s d t

oc

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CD

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The request of the market for a lock nutwith an outer diameter as smal l as possi-ble with a good hydraulic pressure trans-mission, which is in i t iated by an Al lenwrench and combined - on request -

with the possibil i ty to optimize the con-centricity of the hob, resulted in this solu-t ion.

The hydraulic lock nut is screwed on tothe arbor by hand, With an Al len wrenchSW4 the desired clamping pressure isbu i l t up, depending on the arbor d iame-ter. The value of the effective, purely axialc lamping pressure is adjusted and moni-

tored by the clamping pressure indica-tor/ control . To bui ld up the clampingpressure a torque less 5 Nm is requiredat the oressure screws.

The hydraul ic lock nut is also of feredwith an integrated al ignment r ing, espe-c ia l ly for hob c lamping.

By the equal iz ing wedges incorporated inthe al ignment r ing, the concentr ic i ty ofthe hob can be, beginning at the lowestpoint , speci f ical ly inf luenced and therebyopt imized.

When choosing the hydraul ic lock nut orthe al ignment r ing, please not ice:

The arbor-a and hob spacer ring out-s ide-o should correspond to dimensionsd, and dr ,

l f th is is not possible, the fol lowing thumbru le shou ld be app l ied, when choos ingthe appropr iate al ignment r ing:Cutter- /spacer r ing outside-o : drtS mm.

Dimens ions o f a l ignment r ings on ly see.Al ignment Ring FACERA No. AK76


Ulmer StraBe 56 D-89537 GiengenlBrenz

P0 Box 1504' D-89530 Giengen/Brenz

Telephone +49 (0) 7322-60 06 'Telefax +49 (0) 7322-6008

i nfo @sch rem-too ls.com . www. sch rem -tools.com

Technical Data D98

Technical Data DAK98

Dimensions

Please specify arbor 0.D. andthread when ordering.



PrMarkedl

nng I


D98-116 1 6 0.625 40 p lane 40 8800D98-122 22 0 866 50 o la ne 50 11 000D9B-132 J I 1 .25 60 olane 60 13200



PrMarkedl

r rng I


DAKg8-0',13 M12x1.0 0.625 20 0 tane /_v 4400DAKg8-016 M16x1 ,5 0 866 40 0 la ne 40 8800DAKg8-022 M22x1,5 1.0 50 p la ne 50 11000DAKg8-027 M25x1,5 1 .25 60 0 ta ne 60 13200DAKg8-032 M25x1,5 1 5 60 0rane OU 13200

Special design: please specify thread when ordering.

DAKg8-116 16 0 625 40 prane 40 8800DAKgB-122 22 0 866 50 0ra ne 50 11 000DAKg8-132 1.25 OU 0rane 60 13200

Order No, Dimensions (mm)

0 D m a r 6 d , @ d z L Lr L2 L3

D98-116 16 36 t o 40 29 12D9B-122 20 42 20 40 29 12D98-132 30 52 32 54 43 1 9

Order No. Dimensions (mm)0 D m a r o d,, 6 d z L L1 L2 L3

DAK98-013 M12x1 ,0 36 13 40 29 12DAK98-016 M 16x1,5 36 16 5 6 40 29 12DAK98-022 M20x1,5 42 20 56 40 29 12DAK98-027 M25x1 ,5 52 27 70 R/ l 43 1 9DAK98-032 M25x1,5 52 70 54 43 1 q

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DAKgB-116 1 6 J O 16 56 40 29 1 at z

DAK9B-122 20 42 20 5 6 40 29 4 a

DAKgB-132 30 52 70 54 43 1 9

Concentricity is a very important conside-ration for hob clamping.To improve the accuracy of the concentri-city, equalizing screws and a correspon-ding annular piston have been added tothe well-tried hydraulic lock nut POLYMA-MINORA No. D92.

As usual, the hydraulic lock nut is screwedonto the arbor. A purely axial clamping force is built upby means of the two pressure screws,being arranged radially on the circum-

ference, via the self-contained hydraulic-system. The clamping pressure indicator is used to set up and monitor the effec-tive clamping pressure.

The hob pre-tensioned in this way maybe optimised in its concentricity at theside of the hydraulic lock nut when moun-ted to the machine.

The arrangement of the alignment screwson the circumference at an angle ofapprox. 15° which affect the annular pis-ton, makes it possible to optimise theconcentricity with a fully axial force loadand mounted thrust bearing.

D 87

POLYMA-ACCURATA

With clamping pressure indicator, equalizing screws

Hydraulic lock nut DA92

AAC

CU

RA

TAP

OLY

MA





[email protected] . www.schrem-tools.comPOLYMA-ACCURATA

With pressure indicator, equalizing screws

Hydraulic lock nut DA92

Technical Data

Order No.

1

Arbor diameter to



Pressure indicator

mm inchMarked

ringClamping force


kN lbs


Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

DA92-G012DA92-G016DA92-G020

DA92-G036DA92-G030

16223240

405060

100

0.6250.8751.251.5

405060

100

8800110001320022000

111

DA92-G012DA92-G016DA92-G020DA92-G030DA92-G036

to 12to 16to 20to 30to 36

3636566472

1616223240

50 55637179

3535353545

12 0.5 25 1 25 5500

POLYMA ACCURATA RS e druck/Ä 05.09.2005 2:06 Uhr Seite 1

Hydraulic clamping devices produce astrong, purely axial clamping pressure,capable of being defined and monito-red, also having a floating clampingsurface.

As already known from the hydraulic locknut POLYMA-ADJUSTA DAKK92, the inser-tion of a flange between the arbor andthe lock nut prevents the part to be clam-ped from being displaced, even by a mi-crometer, in the radial direction.

Especially for the LIEBHERR-hobbing ma-chines this lock nut was designed for ar-

bor diameters <25 mm (1") because thecone, which is necessary to adpot thecounter stay, is already integrated in theinserted flange. Based on the also inte-grated bevel spring the flange in additiontakes over the reset of the hydraulic sys-tem into the zero/starting point position,when released.

Built-in wedge segments in the annularpiston allow optimal concentricity by in-creasing the buckling strength in con-junction with the flange and clampingdevice.

Operation:

Mount shaft as vertically as possible.

Generate desired axial clamping poweraccording to clamping power indicator.

Check concentricity.

Align via wedges. Begin by correcting atthe lowest point of rotation. Continuecorrecting by actuating the wedges untilthe gear hob reaches the desired degreeof concentricity. Wedges should not pro-trude past the outer diameter of the hy-draulic clamping device.

Tighten all unused wedges by hand sothey just make contact .PP

OLY

MA

D 87

POLYMA-ADJUSTA

With clamping pressure indicator, equalizing wedges, hydraulic retract

Hydraulic mechanical lock nut DAKK105

AD

JUST

A

●

●

●

●

●





[email protected] . www.schrem-tools.comPOLYMA-ADJUSTA

Technical Data

Order No. ThreadØ



Pressure indicator

mmMarked

ringClamping force

Ø D Ø d1 Ø d2 Ø d3 Ø d4 Ø d5 Ø d6 L

kN lbs

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

DAKK105-008DAKK105-010DAKK105-013DAKK105-016DAKK105-019DAKK105-022DAKK105-025

152030405050

DAKK105-008DAKK105-010DAKK105-013DAKK105-016DAKK105-019DAKK105-022DAKK105-025

M10x1,0LHM12x1,5LHM14x1,5LHM18x1,5LHM18x1,5LHM18x1,5LH

M8x1,0LH 30303030404040

810131619,12225,4

65656565656565

68

1012141414

17171717171717

25252525252525

50505050505047

12 1111111

12152030405050

26403300440066008800

1100011000

M8x1,0LHM10x1,0LHM12x1,5LHM14x1,5LHM18x1,5LHM18x1,5LHM18x1,5LH



Hydraulic clamping devices produce astrong, purely axial clamping pressure,capable of being defined and monito-red, also having a floating clampingsurface.

The insertion of a flange between the ar-bor and lock nut prevents the part frombeing displaced, even by a micrometer, inthe radial direction. The flange also has anintegrated bevel spring which resets thehydraulic system to the zero/starting posi-tion when released. Built-in wedge seg-ments in the annular piston allow optimalconcentricity by increasing the buckling

strenght in conjunction with the flangeand clamping device.

Operation:

Mount shaft as vertically as possible.

Generate desired axial clamping poweraccording to clamping power indicator.

Check concentricity.

Align via wedges. Begin by correcting atthe lowest point of rotation. Continuecorrecting by actuating the wedges untilthe gear hob reaches the desired degreeof concentricity. Wedges should not prot-rude past the outer diameter of the hy-draulic clamping device.

Tighten all unused wedges by hand sothey just make contact .PP

OLY

MA

POLYMA-ADJUSTA



AD

JUST

A

●

●

●

●

●





[email protected] . www.schrem-tools.comPOLYMA-ADJUSTA



Technical Data

Order No.

1

Arbor diameter to



Pressure indicator

mm inchMarked

ringClamping force


kN lbs


Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

DAKK92-016DAKK92-022DAKK92-027

DAKK92-040DAKK92-050DAKK92-060

DAKK92-100

DAKK92-032

DAKK92-080

22 273240506080

50607080

100120150

0.8661.01.251.52.02.3753.125

5030/6030/7040/8060/10060/12080/150

110006600/132006600/154008800/1760013200/2200013200/2640017600/33000

100 2003.875 100/200 22000/440001/21/21/21/21/21/21/2

DAKK92-016DAKK92-022DAKK92-027DAKK92-032DAKK92-040DAKK92-050DAKK92-060DAKK92-080DAKK92-100

to 16to 22to 27to 32to 40to 50to 60to 80to 100

162227324050608090

36424752607080

100120

60 65707585

100120135150

404042424242424555

16 0.625 40 1 40 8800

This specification was drawn up at therequest of GLEASON-HURTH.

It can also be used for other purposes,however, The self-contained hydraulic sys-tem is actuated by tightening the screws,and a purely axiaI pressure is generatedby the clamping piston, At the same time,the hydraulic resetting mechanism is ac-tivated by bevel springs mounted on thec lamping p is ton,

ffi:ffiWWWW*@,ffitr -W# ffi ,tr

When the system is relieved - by slacke-ning the screws - the hydraul ic pressurecol lapses, and the spr ing assembly resetsthe entire hydraulic system to its zerolstar-t ing posi t ion.

The wrench for t ightening the mechani-cal nut is no longer necessary as wel l asarrest ing the spindle.

The magnitude of the effective power canbe monitored by the pressure indicatotregardless of the mechanical pressure.


Ulmer StraBe 56 D-89537 GiengenlBrenz

POBox 1504 . D-89530 Giengen/Brenz


[email protected] . www.scnrem-tools.com

Technical Data Please specify arbor 0,D, or thread when ordering.

Dimensions



Pressure indicatorMarked I Clamping force

r i n s l k N I l b sDK92-E20 2 2 | 0 8 7 5 40 1 40 | 8800

Order No. Dimensions (mm)@ D b d t 6 d z 6 d s L

DK92-E20 ro 22 52 22 65 44

ac

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As a result of the tendency to dry cutting,demands made on lock nuts are chan-ging. Further development resulted fromour experiences with the hydraulic locknut POLYMA-MINORA D92.

The insertion of a flange has 2 functions:

To prevent the radial movement of thehob even by micrometers.

To reset the hydraulic to the zero /homeposition, when the internal pressure is re-duced.

During dry hobbing, temperatures of 100°Cmay occur in the area of the lock nut .This requires the use of a special hydrau-lic medium and appropriate seals.

As usual, the lock nut is screwed onto thecutter arbor by hand. By screwing-in thepressure screws, the clamping force is in-creased corresponding to the data of thehydraulic lock nut and the requirements.Both pressure screws have to be tightened.The value of the effective pure axial clamp-ing force can be read from the pressureindicator. By inserting the flange a concen-tricity of 10 µm is achievable, in most ca-ses, without special alignment.

When the hob is changed, the keyed flangetakes over the hydraulics retract function– after the pressure screws have been un-screwed – so that it is easier to unscrewthe lock nut from the arbor.PP

OLY

MA

POLYMA-SICCA

With clamping pressure indicator, hydraulic retract

Hydraulic lock nut DK92-Z

SIC

CA

●

●

POLYMA-SICCA e druck 04.09.2005 18:08 Uhr Seite 1





[email protected] . www.schrem-tools.comPOLYMA-SICCA

With pressure indicator, hydraulic retract

Hydraulic lock nut DK92-Z

Technical Data

Order No. Thread Arbor diameter to



Pressure indicator

mmmm inchMarked

ringClamping force


kN lbs

For the standard version:

For an additional charge, threads can be made accor-ding to your instructions. In this case, the order data isas follows:

Dimensions

Subj

ect t

o te

chni

cal a

ltera

tions

DK92-Z027DK92-Z032DK92-Z040

DK92-Z060

DK92-Z127

DK92-Z140DK92-Z150DK92-Z160

DK92-Z050

DK92-Z132

607080

100

5060

30/6030/7040/8060/100

4030/60

6600/132006600/154008800/1760013200/22000

110006600/13200

70 30/70 6600/1540080 8800/1760040/80

100 13200/2200060/100

1/21/21/2

11/21/21/21/2

DK92-Z027 / DK92-Z127DK92-Z032 / DK92-Z132DK92-Z040 / DK92-Z140DK92-Z050 / DK92-Z150DK92-Z060 / DK92-Z160


5256627485

4450566272

65 707686

100

3636363636

2732405060

2732405060

1.01.251.52.02.375

1.01.251.52.02.375

50 1 40 11000M24x1,5LHM30x1,5LHM36x2,0LHM42x2,0LHM52x2,0LH


1/2

The versatility of the device led to theintroduction of a hydraulic resettingmechanism, making it even easier andsafer to operate, e.g. in applicationswithout a spindle locking device.

Screw on the clamping device by handand actuate the seff-contained hydraulicsystem by tightening the secantal screws.The pressure built-up causes the clamp-ing ring to move in the axial direction,whi le tension is appl ied to a spr ing ac-t ing on the clamping r ing, l f the hydrau-lic pressure is reduced by slackening the

ffiffiWWWW

pressure screws, the spring resets the en-tire hydraulic system to the zero or star-t ing posi t ion. This means that there is noneed to reset the hydraul ic system manu-al ly v ia the nut thread, for example.

The hydraul ic resett ing mechanism l imitsthe stroke of the annular piston to approx.0,5 mm (0,02 inch), whi le retaining al lthe advantages and character ist ics of thehydraul ic c lamping device, i ,e. i ts abi l i tyto generate a purely axial - and, i f needbe - strong clamping power capable ofbeing def ined and monitored, using onlyan Al len wrench.

No transverse forces are generated to dis-place the parts from their correct posit ion.The a ids requ i red for mechanica l c lamo-ing, such as wrench extensions and ham-mers, can be el iminated, Thus, contr ibu-t ing to the goal of labour saving, accidentprevent ion and reduced setup t imes.





[email protected] . www,schrem-tools.com

Technical Data Please specify arbor 0.D. or thread when ordering

Dimensions



PrMarked

rrng


DK92-400 60 2375 100 1 60 132002 100 22000

DK92-500 70 2.75 120 1 60 132002 120 26400

DK92-600 80 J . t l c 1 5 0 1 80 176002 1 5 0 33000

DK92-700 100 3.875 200 1 100 220002 200 44000

DK92-800 120 475 200 1 100 220002 200 44000

DK92-900 140 5.5 250 1 120 264002 250 5 5000

DK92-1000 160 625 250 1 120 264402 250 5 5000

Order No. Dimensions (mm)g D @ d t @ d , @ d t @ d o L L1 L2 L3

DK92-400 to 60 85 t0 100 09 3 8 23 5 t

DK92-500 to 70 00 B5 119 24 3B a aL J 32 J /

DK92-600 to B0 20 105 130 44 3B 1 J 32 J /

DK92-700 to 100 a a 120 1 5 0 5B 53 3 6 46DK92-800 to 120 60 138 173 B6 53 J O 46 6 )

DK92-900 to 140 15 1 5 5 1 9 8 201 5 3 J O 46 52DKg2-1000 to 160 200 180 210 226 53 J O 46 52

a d z

C

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c)

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ffiffiWWWWF\Irant ing of the patent in1953 was the basis forthe production of our hydraulic lock nuts.

Besides our standard program shown in our cata-logue we manufacture a great variety of machineand customer-specific lock nuts.

Our hydraul ic lock nuts are mainly used with ma-chine tools, wood working machines and the foodindustry. Therefore our hydraulic lock nuts are manu-factured from steel, stainless steel, and aluminiumwith the appl icat ion-speci f ic respect ive seal ing andhydrau l i c med ium.

I t is sel f -evident that we manufacture besides ourpressure-screw activated hydraulic lock nuts alsolock nuts, where the hydraulic is activated via greasenipple/grease gun, hydraul ic aggregate or machinehydraulic with pressure pin. Even the extent of thestroke at the ring piston can be adapted accordingto the requirements.

The actuation of the pressure screws or the additi-on of the hydraulic medium activates the self-con-tained hydraulic system with the pressure transfor-mat ion .

Th is induces a t the most ly annu lar hydrau l i c p is tona force clamping the parts to be clamped on anarbour in a purely axial d i rect ion against a posi t ivestop. The amount of the act ing c lamping pressurecan be ident i f ied and monitored via an integratedpressure indicator.

Advantages:r purely axial c lamping pressurer def ined clamping pressure

r i f needed, much higher c lamping pressure

r f loat ing c lamping surface. the part remains in the predef ined posi t ionr dur ing the c lamping procedure no radial forces

. .,iT,,

,.t,. ' : ' , ' - ' . , 1,' l . ,lt

'tl::.q'i1;,1'1!:t"'-:1.::::,+,

Our hydraul ic lock nuts are also avai lable wi th hy-draulic retract.

Constructions with hydraulic retract reset the hydrau-lic automatically to the zerolstarting position as soonas the internal hydraulic pressure breaks down.

Following some typical design examples areshown, Fufihermore many additional designsand design combinat ions are conceivable.

Should you look for a solution of this type oftaslc s imply ask us and we wit l readi fy help you.

The clamping pressure can be achieved by

o Pressure screws:For un-clamping turn back the pressure screws

o High pressure grease pump:Un-clamping is achieved by release of thehydraul ic medium with the drain plug

r Un-clamping is achieved by feeding back of themedium to the grease pump

r Frxed hydraulic connectionUn-ciamping is achieved by feeding back of themedium rn to the hydrau l i c un i t

Fff i

F v a m n l p q

Nut

Screw

C l a m p i n gO U S N

Pressure scfews

High pressuregrease pump

Fixed hydraul icc0n neclron

ALBERT SCHREMWerkzeugfabrik GmbHUlmer StraBe 56 D-89537 Giengen lBrenzP0Box 1504 . D-89530 Giengen/BrenzTelephone +49 (0) 7322-6OOGTelefax +49 (0) 7322-60OBi nfo@sc h re m -too ls.com' www. sch re m -too ls.com

Bayonet nut

d 87 polyma a m y p - jrm international...

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