clampingtechnology - brixis.co.uk · Witte Gerätebau Horst Witte Gerätebau, founded 1969, manufactures not only their own range of products but also ultra precision products for

Vacuumclampingtechnology

E- 2002

Witte Gerätebau

Horst Witte Gerätebau, founded 1969, manufactures not only their own range of products but also ultra precision products for aerospace, medical technology etc.

Among a broad range the emphasis lies on the development andmanufacture of advanced workpiece clamping systems for universal application. Witte has taken up the lead in the branches of „flexible fixturing“ and „vacuum technology“ as a result of manypatented solutions. The range is complemented with contour milling attachments.

The high quality of all Witte products is verified according to DIN 9003:Qualified staff and a modern machine shop are further guarantees for quality.A wide network of agents ensures supportin all important industrial nations.

Horst Witte GerätebauD-21354 BarskampHorndorfer Weg 26-28

Tel.: +49 (0) 58 54 / 89-01Fax.:+49 (0) 58 54 / 89 40E-Mail: [email protected]@Horst-Witte.deInternet:www.vakuumsysteme.de

WITTE GERÄTEBAU VACUUM-CLAMPING SYSTEMS2

VACUUM CLAMPING SYSTEMS CONTENTS 3

Vacuum supply from page 8

Pumps, Units, CompressorsAccessories

WITTE VAC-MATTM from page 23

Application, Starter Sets, Accessories

Vacuum-chucks from page 32

Grid, Sintermetal, Vacudisc-ceramic,Metapor ©, Slot, Rubber adapter mat,Covering foil, Perforated-grid, Ice Vice©

FLIP-PODTM from page 59

Application, Sets, Accessories

Circular chucks from page 70

Grid, Sintermetal

Liquid separators from page 74

Conventional, Automatic

Accessories from page 76

Seal, Grease, Pressure switch, Safety appliances, Manifold distributorsRotary joints, Valves, GaugesConnections, Plugs, Nozzles, Hoses

METAPOR© from page 92

VACUUM CLAMPING SYSTEMS4

Vacuum clamping systems give you a technological advantage.Use your time more profitably!

Possibilities:

- reducing clamping times

- carrying out various machining operations (i.e. milling, grinding, turning, engraving, sparking, checking and measuring, coating,drilling, reaming and chamfering under certain conditions)

- using a universal clamping system for different workpieces

- clamping non-magnetic materials

- machining aluminium, non-ferrous metals, graphite, plastics, glass, wood, ceramic, titanium, and steel

- machining without oscillation or vibration

Vacuum Clamping Systems

VAC-MATTM modular chuck in use: 5-sidemachining in one clamping procedure, machi-ning through the workpiece without having touse a special fixture

- only one clamping procedure for 5 side machining

- clamping extremely thin workpieces and foils

- milling through workpieces

We offer proven clamping solutions to fulfill these requirements

Vacuum clamping fixture forexternal and internal grindingof cylindrical quartz glassworkpieces


Setting up a vacuum system

Vacuum supply:A modular vacuum unit with

integrated liquid separator, storage tank and pressure control.

Other pumps/units are available.

Vacuum distributor, connection unit or safety appliance:Distribution of operating vacuum to thechucks. Gauges, choice of manual ormagnetic valves and pressure controls forwatching over operating vacuum level. Allthese variations are available.

Vacuum chucks:Chucks to accomodate your requirements and

clamping operations. Photo shows VAC-MATTM

chucks for 5 side machining


Clamping with vacuum

Workpiece shape

Slot chuck with perforated rubber adapter mat

Grid chuck

Witte VAC-MATTM


Clamping with vacuum

Workpieces with small surfaces

Witte VAC-MATTMCircular grid chuck

Chuck specially designed for workpieces

Chuck with insert made out of sintered metal,Witte Metapor© or made of a ceramic materialfor foils and skins

Slot chuck with perforated rubber adapter mat

VACUUM-UNITS VACUUM CLAMPING SYSTEMS8

Depending on your operation Witte offers different vacuum supply systems:

Handheld pumps / Pumps Standard solution, almost all of which can be used together Pages 8 and 9 with our liquid separators if fluids are used during machining.

Vacuum units In addition to the pumps mentioned above the vacuum units Pages 10 and 11 also have an additional vacuum tank as well as various safety devices.

Modular vacuum unit In addition to the pump and tank the modular vacuum units Pages 12 and13 also have an integrated liquid separator and various safety devices.

Choose your vacuum supply according to the clamping area:

Area Suction Type No. Motor max. lxwxh Kgcapacity V/kW mbar mm

<100cm2 3m3/h Vacuum pump 80112 230/0,12 150 209x152x120 6,3

<1200cm2 6m3/h Vacuum pump 80389 230/0,25 150 224x152x120 7,96m3/h Vacuum pump 81320 230/0,37 50 285x135x240 136m3/h Vacuum unit 81010 230/0,37 50 555x315x325 196m3/h Vacuum unit 81011 400/0,37 50 555x315x325 196m3/h Modular unit 80172 230/0,37 50 ø500x630 256m3/h Modular unit 80173 400/0,37 50 ø500x630 25

<5000cm2 16m3/h Vacuum pump 82116 400/0,55 20 306x226x182 1816m3/h Modular unit 82146 400/0,55 20 ø500x630 31

<1m2 21m3/h Vacuum pump 80078 400/0,75 20 410x230x225 1921m3/h Vacuum unit 80000 400/0,75 20 555x315x325 1921m3/h Modular unit 80175 400/0,75 20 ø500x630 45

<2m2 63m3/h Vacuum pump 80126 400/1,5 20 602x406x290 5263m3/h Modular unit, mobile 82150 400/1,5 20 600x600x1030 95

<3m2 100m3 Vacuum pump 84410 400/3,0 20 692x406x290 70

<4,5m2 160m3 Vacuum pump 84412 400/5,5 20 834x478x407 140160m3 Vacuum unit, mobile 84414 400/5,5 20 1200x800x1350 200250m3 Vacuum pump 84413 400/5,5 20 957x523x407 190250m3 Vacuum unit, mobile 84208 400/5,5 20 1200x800x1350 250

Choosing a vacuum unit or pump

Vacuum pump Nos. 80112 and 80389 are dry running. All other pumps and units are oil lubricated.All pumps and units are also available in 110V/60Hz.

Witte VAC-MATTM

No. of Mats Required suction capacity1 3-6m3/h

≥ 8 16-21m3/h≥ 20 40-63m3/h≥ 50 100-160m3/h

FLIP-PODTM

Each m2 of FLIP-PODTM surface requires 60-100m3/h vacuum suction

VACUUM CLAMPING SYSTEMS VACUUM-UNITS 9

Choosing a vacuum unit or pump

Dry machining Working with fluids

+

+

+

small clamping area,

small loss of vacuum

low machining forces

Choosing vacuum supply according to working conditions:

larger clamping area,

higher loss ofvacuum,

higher machiningforces

large clamping area

high loss of vacuum

high machining forces

very large clamping area

very high vacuum loss

very high machining forces

Handheld pump Handheld pump with liquid separator

Vacuum unit

Modular vacuumunits and workstati-ons are suitable fordry and lubricatedmachining

Mobile modular vacuum unit Vacuum unit, mobile, with automatic liquid separator

Modular vacuum unit Vacuum workstation

Vacuum unit with liquid separator

VACUUM PUMPS VACUUM CLAMPING SYSTEMS10

Vacuum pumps

Oil lubricated vacuum pumps offer the followingadvantages:

❍ air-cooled, therefore do not require coolant❍ highly reliable❍ low operating costs❍ good resistance to condensation ❍ integrated oil mist separator, oil filter,

check valve on suction side with sieve

81320 Vacuum pump 6m3/h



Supply includes:

3m wire spiral hose3/2 way aerated handvalve and vacuummeter

VACUUM CLAMPING SYSTEMS VACUUM PUMPS 11

Vacuum pumps, 230/400 V working voltage

82118 Vacuum pump 63 m3/h

No. Suction- Motor Lubricant max. dB(A) lxwxh Kgcapacity V/kW mbar mm

80112 3m3/h 230/0,12 dry 150 57 209x152x120 6,3

80389 6m3/h 230/0,25 dry 150 60 224x152x120 7,9

81320 6m3/h 230/0,37 oil 50 59 285x135x240 13

82115 16m3/h 230/0,55 oil 20 60 306x226x182 18

82116 16m3/h 400/0,55 oil 20 60 306x226x182 18

80156 21m3/h 230/0,75 oil 20 62 410x230x225 19

80078 21m3/h 400/0,75 oil 20 62 410x230x225 19

80126 63m3/h 400/1,5 oil 20 65 602x406x225 52

84410 100m3/h 400/3 oil 20 67 692x406x290 70

84412 160m3/h 400/5,5 oil 20 70 834x478x407 140

84413 250m3/h 400/5,5 oil 20 72 957x523x407 190

VACUUM UNITS VACUUM CLAMPING SYSTEMS12

Vacuum units

❍ oil lubricated vacuum pumps with an end vacuum rate of 20mbar absolute at full suction capability of i.e. 3m3 upto 250m3 per hour

❍ integrated pressure difference switch, whichautomatically switches the vacuum pump onor off thereby ensuring vacuum during machi-ning but avoiding unnecessary idle running

❍ protection switch which protects electric motor from overheating

❍ air filter which protects pump from dirt (made of acrylic glass with exchangeable air filter cartridge)

❍ careful assembly of compatible components guarantee trouble-free and almostmaintenance-free operation using Witte vacuum units in many applications

❍ drainage screw for coolants which have been sucked in

❍ 3m connecting cable with CEE or Schuko plug

i

The standard components of these triedand tested vacuum units are:

a. vacuum storage tankb. oil lubricated vacuum pumpc. vacuum valve unitd. air filtere. vacuum hose connectorf. pressure difference switchg. on/off switchh. electric cable with plugi. overload protection

80165 Vacuum unit 21m3/h

Supply includes:

1 Pce connection unit complete withvacuum gauge, 3/2 way hand valve, 3m vacuum hose with quick coupling

The operating vacuum required can be produced in many ways.Witte vacuum units feature the following:

a

b

c

d

e

f

g

h

i

VACUUM CLAMPING SYSTEMS VACUUM UNITS 13

Vacuum units230/400 V working voltage

84208 Mobile vacuum unit

No. Type Suction Motor max. dB(A) lxwxh Kgcapacity V/kW mbar mm

81010 Vacuum unit 6m3/h 230/0,37 50 59 555x315x325 19

81011 Vacuum unit 6m3/h 400/0,37 50 56 555x315x325 19

85323 Vacuum unit 16m3/h 230/0,55 20 60 555x315x325 44

85324 Vacuum unit 16m3/h 400/0,55 20 60 555x315x325 44

80165 Vacuum unit 21m3/h 230/0,75 20 62 555x315x325 45

80000 Vacuum unit 21m3/h 400/0,75 20 62 555x315x325 45

80001 Vacuum unit 63m3/h 400/1,5 20 65 800x500x530 105

92302 Vacuum unit, mobile 100m3/h 400/3 20 67 1200x800x1240 130

84414 Vacuum unit, mobile 160m3/h 400/5,5 20 70 1200x800x1350 200

84208 Vacuum unit, mobile 250m3/h 400/5,5 20 72 1200x800x1350 250

All pumps and units are also available in 110V/60Hz.


Modular vacuum units

a. storage accumulator coverb. storage accumulator bottomc. acrylic glass cylinderd. threaded stude. mist collectorf. profile sealg. drainage plugh. e-motori. pressure difference switchk circuit relayl. airfilterm. oil filling plugn. vacuum pumpp. exhaust air valver. oil level gauges Schuko/CEE-Plug with overvoltage relayt. on/off switchu. wire spiral hose

Advantages:

❍ vacuum storage unit and liquid separator are integrated - an additional liquid separatoris not required

❍ space saving assembly of all components

❍ see-through unit for liquid separator and vacuum storage unit all in one means safety ”at a glance“

❍ different storage volumes possible simply by changing acrylic glass cylinder

❍ integrated air filter, drain separator, overvoltage relay, pressure difference switch

❍ available with different pump types from 6m3 to 63m3, on request also available with dry running pumps

a.

t.

l.

s.

u.

r. n. m. p. h.i.k.

b.f, g

c.

d.

e.


82150 Modular unit 63m3/h, (mobile)


No. Type Suction Motor max. dB(A) lxwxh Kgcapacitym3/h V/kW mbar mm

80172 Modular vac. unit 6 230/0,37 50 59 ø500x630 25






82150 Modular vac. unit, 63 400/1,5 20 65 600x600x1030 95mobile

83467 Modular vac. unit, 100 400/3 20 67 700x700x1130 113mobile

All pumps oil lubricated. Dryrunning pumps for modularunits are available on requestAll pumps and units are alsoavailable in 110V/60Hz.

Modular vacuum units, 230/400 V working voltage

Supply includes:

1 Pce. connection unit with 2mvacuum hose, 3/2 way ventila-ted hand valve, vacuum gauge


Vacuum fixture on alathe for clamping aluwheel rims

Special chuck for helmets Circular grid chucks

COMPRESSORS VACUUM CLAMPING SYSTEMS18

Radial compressors can be used when mechani-cal forces involved during machining are low, or when a high loss of vacuum occurs i.e.

❍ clamping porous materials

❍ large vacuum chucks (i.e. perforated grid plates)the surface of which cannot be covered completely by the workpiece

Advantages of Witte radial compressors :

❍ maintenance free due to permanently lubricated bearings, surface cooled motor, and contact free turbine wheel

❍ environmental-friendly due to oil-free seals

❍ low running costs

❍ high through-flow of vacuum

WITTE radial compressor

84399 Radial compressor

VACUUM CLAMPING SYSTEMS COMPRESSORS 19

No. Description

84416 Sound absorber SE 0040 C

84417 Sound absorberr SE 0070 C





No. Name Thru-flow- Motor max. dB(A) Connector lxwxh Kgvolume mbar thread mm

84395 SE 0040 C 40m3/h 0,10kW 930 63 R1 1/4“ 176x196x204 5,7

84396 SE 0070 C 80m3/h 0,37kW 880 61 R1 1/4“ 205x238x255 9,0

84397 SE 0120 C 140m3/h 0,75kW 875 66 R1 1/2“ 263x287x306 13

84398 SE 0170 C 220m3/h 1,10kW 860 72 R1 1/2“ 294x327x348 18

84399 SE 0170 C 220m3/h 1,50kW 810 73 R1 1/2“ 294x327x348 19

84400 SE 0300 C 340m3/h 2,20kW 830 73 R2“ 319x375x384 27

84401 SE 0300 C 340m3/h 3,00kW 810 73 R2“ 319x375x384 28,5

84403 SE 0420 C 510m3/h 4,00kW 830 80 R2 1/2“ 486x493x510 38

84405 SE 0420 C 510m3/h 5,00kW 760 80 R2 1/2“ 486x493x510 40

WITTE radial compressor

Supply includes:

3m electro cable, on/off switch withintegrated overvoltage protection relay

84400 Radial compressor

Sound absorber for radial compressor

Also available for different voltages

ACCESSORIES VACUUM CLAMPING SYSTEMS20

Maintenance and service kits

No. For pump/unit with lxwxh kgsuction capacity

81012 6m3, oil lubricated 100x200x210 1,1




89023 160m3, oil lubricated

89024 250m3, oil lubricated

No. Oil Air filter Oil Seal O-Ring Oil level Oil filterseparator gauge

81012 2x80166 2x80360 2x0,2l 2x10645 1x1064480982

80416 2x80345 2x80142 2x0,6l 2x10448 2x10447 1x10644 80418

80417 4x80348 2x80143 4x0,75l 2x10488 4x10447 1x80347 2x80346 80419

82151 2x82155 2x80142 2x0,4l 2x10488 2x10447 1x1064482156

89023 2X84656 1X80325 1x5l 1x12452 1x10447 1x8465580982

89024 3X84565 1X80325 1x10l 1x12454 1x10447 1x8465590959

Comprising of:

Our maintenance and service kits guarantee trouble-free operation ofWitte vacuum pumps and units

Maintenance and service kits for regular care of vacuum units and pumps

VACUUM CLAMPING SYSTEMS ACCESSORIES 21

No. Type For hoseinner dia.

82291 T-shape 6mm

82292 T-shape 12mm

80102 straight 12mm

82519 straight 18mm

82952 straight 24mm

82902 straight 32mm

82953 straight 50mm

Valve units

Additional vacuum tank

❍ for increasing vacuum storage volume of units

❍ acts as additional filter and separator for dirt or fluid

❍ reduces actual running time of vacuum pump

The tank is equipped with two viewing glasses.Dirt and fluid can be seen and drained immediately.

No. lxwxh Connection Volume/ l kg

80410 555x315x325 Inner thread R 3/4“ 45 18

80379 800x500x530 Inner thread R 3/4“ 157 30

Supply includes:

1 Pce 3/2 way aerated hand valve, 3m vacuum suction hose with wire spiral, 1 Pce vacuummeter, 2 Pcs vacuum hose connectors

WORKSTATIONS VACUUM CLAMPING SYSTEMS22

WITTE vacuum workstationVacuum workstation for mobile use in the workshop, with integrated vacuum pump, liquid separator,3-fold vacuum distributor, connectors and gauges

No. Type Suction capacity Motor max. dB(A) lxwxh Kgm3/h V/kW mbar mm

81045 Vac. workstation, 21 400/0,75 20 62 1150x650x1050 205mobile

81046 Vac. workstation, 63 400/1,5 20 65 1150x650x1050 215mobile

❍ vacuum storage tank, pressure difference switch and safety appliance guarantee a triple safety factor

❍ solid steel design on castors also has drawers for vacuum chucks and accessories

Both vacuum workstations have oil lubricated vacuum pumps

Supply includes:

1 maintenance and service kit, 5 l liquid seperator, 10m wire spiralhose, 1 safety appliance, 5m electro cable with CEE-plug 10A

Also available as 110V/60 Hz unit

VACUUM CLAMPING SYSTEMS WITTE VAC MAT TM 23

Witte VAC-MATTM

The vacuum system you can cut right into!

All vacuum chucks have a common factor. In orderto maintain their clamping function, air leaks mustbe avoided at all cost. With VAC-MATTM it’s different.VAC-MATTM s properties allow the operator to cutor drill right through the mat and machine contours,without losing vacuum.To clamp simply place the mat on the special VAC-MATTM chuck and press the workpiece onto the mat.

No seals are required, no covering over with foil,no suction bores to block off, all these procedu-res are not applicable when using VAC-MATTM.VAC-MATTM allows cutting or drilling rightthrough as well as contour milling of workpiecesthrough to their base.

Certain workpiece sizes can even be machinedon 5-sides in one clamping procedure, therebyconsiderably reducing idle times compared toconventional clamping methods.

Height adjustable stops available as an optional extra

WITTE VAC MAT TM


VAC-MATTM Application

What is VAC-MATTM?It is a thin soft polymer mat with manyspaced out vacuum points, suckers indifferent sizes with a fine hole in eachcentre and a raised lip. On the undersidethere are six lugs which locate in thespecial VAC-MAT TM chuck. Further thereare grid shaped grooves which distributethe vacuum to each of the small holes. Alip right around the outside edge ensuresno leakage.

What size is VAC-MATTM?All VAC-MATs are 2,5x200x 300mm.The tolerance lies at +/-0,02mm. Toincrease the size of the working area, themodular VAC-MAT TM chucks are connec-ted to one another and VAC-MAT TM s aresimply placed on as described.

Is VAC-MAT TM reusable?The working life of a VAC-MATTM

depends on the number and size of cutsmade into the mat during machining.

What kinds of VAC-MAT TM

are available?There are 4 types of mat available:❍ Blue mats, standard for normal

machining❍ Green mats, slightly harder in

consistency for heavier machining❍ Red mats, only to be used once❍ Black mats, are used to seal the

areas not required on the VAC-MAT TM

chucks during machining.

VAC-MAT TM allows fast and economicalmachining with only one clamping proce-dure. Not only is clamping very fast butbreak-outs, deburring and hand finishing become a thing of the past.

The lugs underneath the mat guarantee fast andaccurate positioning of the VAC-MAT TM on the special modular vacuum chuck

5 sided-milling an aperture on a VAC-MATTM clampingsystem

The modular concept allowsconnection of several vacuum chucks.

The vacuum supply to each chuckcontinues through theconnection elements.


Thin workpieces can also be clampedand machined securely but gently usingVAC-MAT TM

Vertical clamping can also be carried out reliablywith VAC-MAT TM

Witte VAC-MATTM in use;Above:Direct milling through a work-piece on a modular plate 400x600mm.

Right:Fast handling, short clampingtimes of the workpiece all inone step.

Above:Witte VAC-MATTM- modular pla-tes can be joined according torequired size, the vacuum ismaintained by the connectionelements.

WITTE VAC MAT TM


Combined specialclamping systemmade out ofWitte VAC-MATTM and FLIP-PODTM

Left:Modular-built WitteVAC-MATTM- chuck1600x1200mm


WITTE VAC MAT TM


These starter sets are designed to give the operator a complete solution toset up and start machining immediately. All plates are modular and can beextended with a simple connector at any time.

Starter-Sets

Modular VAC-MATTM plates are made of high-tensile aluminium. Steel versions are available on request.


No. Description lxwxh kg

81759 VAC-MATTM Modular plate 300x200x30 5



IIIIII

No. pcs. ø height of plate knurled nut/ mm mm grub screw

85405 6 20 32,5 M5

85409 9 27 38,0 M6

85410 12 30 48,0 M6

I

II

III

Supply includes:

1 x tail end, 1 x coupling, 7 x blind plug, 10 x O-ring8 x crosspieces, 10 x VAC-MAT TM blue1m vacuum suction hose with wire spiral 18/12

The delivery includes:

Sketch with dimension for threaded holes, suitableknurled nuts and grub screws. The threaded holes mustbe made by the customer.

Special dimensions are available on request!

Modular VAC-MATTM

plates are made of high-tensile aluminium. Steel versions are available on request.

Additional, height adjusta-ble end stops are also available. For fixing endstops, threaded holes haveto be made in the plate bythe customer.

Height adjustable end stops in form of eccentricwashers

WITTE VAC MAT TM


No. Name lxwxh

11030 VAC-MATTM/blue, normal machining 300x200x2,5

11053 VAC-MATTM/green, heavier machining 300x200x2,5

11548 VAC-MATTM/red, only used once 300x200x2,5

11029 VAC-MATTM/black, 300x200x2,5for covering areas not required during machining

VAC-MATTMs

Accessories


V

No. Name Dimension

81761 Hose connector ø1 = 23incl. O-Ring ø2 = 14

81762 Vacuum chuck adapter ø1 = 23incl. O-Ring

81774 Plug ø1 = 23incl. O-Ring

11032 O-Ring ø16x2,5

28331 Tool for setting up ø15x120

89092 VAC-MATTM - Video VHS

I

III

II

IV

Accessories

VAC-MATTM chuck accessories

I

V III

II

IV

Demonstration VAC-MATTM videoavailable. Please ask.

VACUUM CHUCKS VACUUM CLAMPING SYSTEMS32

One of the commonest vacuum chucks sinceclamping with vacuum was discovered is the gridchuck. This type of chuck is used for clamping simplegeometrically shaped workpieces with or withoutcutouts. Special seals laid out according to theworkpiece contour (but incorporating the vacuumsupply bore) help to even out pronounced une-ven or rough surfaces, whilst still securelyholding the workpiece during the application.

❍ ideal for heavy milling and grinding

❍ we recommend a larger O shapedseal diameter when large-sized workpieces are very rough or uneven.O-shaped seal is available in diameters from 2-10mm

❍ the grid distance required depends on the workpiece

Grid type vacuum chucks

Vacuum grid type plate with additional threaded bores

Picture shows a large grid type fixture with different grids enabling simultaneousclamping of different size workpieces

contour and size. We can machine practically any grid dimension. The depth and width of the grooves depend on the O-shaped seal diameter to be used.

VACUUM CLAMPING SYSTEMS VACUUM CHUCKS 33

Vacuum chuck with different grids to allowfor simultaneous clamping of differentsized workpieces

Vacuum connection with switch on a gridplate with eccentric-stops

Strong downforces allow high milling performance



Witte grid chucks are designed and manufactu-red according to customer´s requirements.Dimensions of chuck and clamping area, gridsize, slot width, downforce and best type ofclamping surface are all details taken intoaccount to supply a chuck wich gives optimalresults for the application in question. Use ourinquiry form on page 98 or get in touch with ouragent in your area or with us directly.

The modular concept allows connection ofseveral vacuum chucks. The vacuum sup-ply to each chuck continues through theconnection elements.


Modular-Grid Chuck

No. Grid lxwxh kg

82978 Grid 25 300x200x32,5 5

84161 Grid 25 300x400x32,5 10

84162 Grid 25 600x400x32,5 20

89676 Grid 12,5 300x200x32,5 5

90249 Grid 12,5 400x300x32,5 10

92289 Grid 12,5 600x400x32,5 20

Supply includes:

1 x tail end, 7 x blind plug, 10 x O-ring, 1 x plug, inside dia 12, 10m O-shaped seal1m vacuum suction hose with wire spiral 18/12height adjustable, excentric end stops with discs

Special dimensions available on request!Witte grid chucks are manufactured inhigh-tensile aluminium. Steel versionsare available on request.


Witte sinter metal chucks are manu-factured in high-tensile aluminium.Steel versions and special dimensionsare available on request.

No. lxwxh kg

84686 300x200x32,5 6

84687 300x400x32,5 12

84688 600x400x32,5 24

Special dimensiones available on request

❍ sinter metal vacuum chucks are ideal for extremely thin-walled workpieces and for very soft materials (i.e. rubber, foils, metal bands etc.) or for use in precision optical work.

❍ ideally suited for extremely thin workpieces (<1mm finished Dim., depending on the material) and equally for foils down to less than 0,1mm thickness.

❍ due to absence of grooves and holes workpieces are not deformed for instance on inserts of sinter bronze.

❍ frequently used in precision machining in the optical industry and for measuring and checking in micrometer and nanometer ranges.

❍ sinter metal chucks must be covered entirely or to the largest possible extent. Covering unused areas with foil also improves the holding force.

Sinter metal chucks

Witte sinter metal chucks are alsoavailable in a modular version if required.Sinter metal surface is hard and hashigh resistance to wear and tear


Sinter metal vacuum chuck with special adapter plate for clamping hard metal blanksduring high precision laser machining. It has an integrated cooling labyrinth whichprevents inaccuracies, due to development ofwarmth which occurs during the laser machining process

WITTE-METAPOR© for machining thin walled and flexible workpieces

Any machineable contour, also3D shapes, can be machined

into this porous material


❍ Vacuum chucks with porous aluminium for extremely thin workpieces, very soft workpieces (i.e. rubber, foil thin metals etc.) of for use in fine optical areas

❍ Suitable for really thin materials (<1mm finished dimension) depending on material) and also for foilsup to less than 0,1mm thickness

❍ Deformation of workpiece is impossible because there are no slots or holes

❍ Often used in fine optical processes for measuring and checking in micrometer and nanometer range

❍ Porous vacuum chucks should be completely or largely covered by the workpiece. Placing foil on uncovered areas improves the holding force

METAPOR vacuum chucks are made of high-tensilealuminium. Steel versions are available on request.

METAPOR©-Vacuum chucks BF100 / MC100

Nr lxwxh kg

83401 300x200x38 5

84380 300x400x38 10

84381 600x400x38 20

Nr lxwxh kg

91021 300x200x38 5

92290 300x400x38 10

92291 600x400x38 20

Supply includes:

1 x tail end, 7 x blind plug, 10 x O-ring1 x plug, inside dia 12, 1m vacuum suction hose withwire spiral 18/12, height adjustable excentric endstops

METAPOR©-Vacuum chucks BF100:

METAPOR©-Vacuum chucks MC100:

Witte METAPOR© chucks are alsoavailable in a modular version ifrequired


Special dimensionsavailable on request!

Witte METAPOR CE 100 white is a fine poroused mate-rial with a medium pore diameter which is lower thanthat of BF-100 or MC 100. The surface is white andeasy to machine. The material has a very homogenoustotal porosity.Especially interesting for silizium wafer production

❍ Vacuum chucks with porous aluminium for extremelythin workpieces, very soft workpieces (i.e. rubber, foil thin metals etc.) of for use in fine optical areas

❍ Suitable for really thin materials (<1mm finished dimension) depending on material) and also for foils up to less than 0,1mm thickness





METAPOR©-Vacuum chucks CE100

Supply includes:


Nr lxwxh kg

91488 300x200x38 5

92294 300x400x38 10

92296 600x400x38 20

METAPOR©-Vacuum chucks BF100:


Unique porous, corrosion-free steelPorosity lies approx between that of METAPOR BF Aland MC 100 Al.A special difference to the BF, MC and CE materials isin the substantially higher ball pressure hardness ofINOX 100 FE

❍ Vacuum chucks with porous aluminium for extremelythin workpieces, very soft workpieces (i.e. rubber, foil thin metals etc.) of for use in fine optical areas

❍ Suitable for really thin materials (<1mm finished dimension) depending on material) and also for foils up to less than 0,1mm thickness





METAPOR©-Vacuum chucks INOX 100

Supply includes:


Nr lxwxh kg

92298 300x200x38 6,2

92299 300x400x38 12,4

92300 600x400x38 24,8

METAPOR©-Vacuum chucks INOX100:

Special dimensionsavailable on request!


Combined METAPOR grid typechuck for friction stir weldingapplication


Slot vacuum chucks

Unmistakeable unique characteristics:❍ very flat, only 28mm high❍ very light, made of high tensile aluminium

(Steel versions available on request)❍ height adjustable end stops

Especially suitable for:❍ engraving❍ light milling work❍ light drilling work

Using the slot chuck together with a rubberadapter mat offers further advantages

❍ milling and drilling of i.e conductor plates without loss of vacuum

❍ engraving machines with a limited working height can easily be equipped with a Witte slot chuck

❍ simply define the vacuum area by pushing plastic clip into the slot marked with guidinglines

All vacuum slot chucks have a 10 mm clam-ping edge. The slot width is 1 mm with amiddle distance of 5 mm.


Special dimensions available on request!

Slot vacuum chucks

No. Clamping area Total dim. kglxw l1xb1xh

84422 150x100 170x100x28 1,5

84423 200x100 220x100x28 1,9

84424 250x150 270x150x28 3,4

84425 200x200 220x200x28 3,6

84426 300x150 320x150x28 3,9

84427 350x150 370x150x28 4,4

84428 400x200 420x200x28 6,6

84429 350x250 370x250x28 7,5

84430 300x300 320x300x28 7,8

84431 400x250 420x250x28 8,5

84432 400x300 420x300x28 10,2

84433 400x400 420x400x28 13,6

84434 500x300 520x300x28 12,1

84435 600x300 620x300x28 14,4

84388 600x400 620x400x28 19,2

Slot chucks

Supply includes:

1 vacuum stopper1 rubber adapter mat, 3 height adjustable end stops1m hose with connector for quick coupling


Rubber adapter mats for slot vacuum chucks

Rubber adapter mats, red,for use on slot typevacuum chucks (see alsopage 46)

No. Dim lxwxh

00005 150x100x3

00006 200x100x3

00007 250x150x3

00008 200x200x3

00609 200x500x3

00564 200x600x3

00009 300x150x3

00010 350x150x3

00011 400x200x3

00013 350x250x3

00014 300x300x3

00015 400x250x3

No. Dim lxwxh

00016 400x300x3

00017 400x400x3

00415 500x300x3

00164 500x500x3

00418 500x1000x3

00437 600x300x3

00414 600x400x3

00409 1000x1000x3

00682 1000x2000x3

00732 1000x2000x1

00733 1000x2000x1,5

Dimension tolerances:DIN 7715 Part 5

Rubber adapter matswith lower tolerances(0,05mm) are availableon request


Rubber adapter mats for slot vacuum chucks

Rubber adapter mats,black, for use on slot typevacuum chucks made ofsynthetic elastomer.These mats can be milledover and allow high planeparallelism

No. Dm lxwxh

00845 100x150x3

00846 100x200x3

00847 150x250x3

00848 200x200x3

00849 200x500x3

00850 200x600x3

00851 150x300x3

00825 200x400x3

00852 250x350x3

00853 300x300x3

No. Dm lxwxh

00796 250x400x3

00854 300x400x3

00855 400x400x3

00856 400x500x3

00857 500x500x3

00858 300x600x3

00791 400x600x3

00859 500x1000x3

00860 1000x1000x3

00861 1000x2000x3


Slot vacuum chucks and rubber adapter mat

Simply follow steps 1-5 and acustom built fixture is ready inseconds. When vacuum is swit-ched on the mat and the work-piece are sucked down together.The excellent friction values offerespecially good resistance todisplacement forces duringmachining.

Using the slot chuck with therubber adapter mat allows dril-ling of holes and milling or cut-ting of pockets and cutouts intothe mat to a depth of 1,5mmwithout losing vacuum. As themat suffers hardly any wear andtear it can be used often forworkpieces with the same con-tour.Certain applications allow thetool to work to depths of 1,5mminto the mat.Height tolerance of the mats liein the range of +/-0,3mm. (DIN 7715, part Kl. P2)

Application

Lay the rubber adapter mat onto thechuck covering all the slots.

Position workpiece with the help of adju-stable end stops. Then draw round thecontour using an ordinary pen

1

2


Here you can see the workpiece contour

Remove the mat andpunch holes into thearea corresponding tothe actual clampingsurface of the work-piece. The holes shouldbe approx. 3-8mm Dia.in a 10mm grid and lieon slots of the chuck

Replace workpiece onto the mat. The excellent friction of the rubber material counter-acts high-displacement forces better than any other vacuum system.

34

5


Slot vacuum chucks - special versionsSlot vacuum chucks for workpieces withcomplicated geometrical forms, also withcut-outs i.e. screens; ideal for lightmachining operations like engraving orgrinding etc.The vacuum supply is connected to amoveable hose within the plate. In orderto reduce the area affected by vacuumthe hose is pulled towards the user andthe end sealed with a plastic chip putinto the plate between the lines marked.All slots can be covered also usingcovering foil (accessories). On the sameprinciple as the rubber adapter mat, theworkpiece contour is traced onto the foil.The foil within the contour is then slitusing a knife resulting in a custom builtfixture in seconds.By using adapter plates it is also possibleto create multiple fixtures

Slot vacuum chuck with 3 vacuum areas, which work combined or independantly

Slot vacuum chuck with special adapter plate


Covering foil

No. lxw pcs. kg

80269 150x100 400 2,2

80270 200x100 300 2,2

80271 250x150 170 2,2

80272 300x150 140 2,2

80273 350x150 120 2,2

80274 400x200 70 2,2

80275 500x200 55 2,2

80276 600x200 45 2,2

80277 400x250 60 2,2

No. lxw pcs. kg

80278 500x250 45 2,2

80279 400x300 48 2,2

80280 500x300 35 2,2

80445 400x400 32 2,2

80281 600x300 30 2,2

80446 600x400 21 2,2

80282 800x400 18 2,2

80447 1000x500 8 2,2

This aluminium foil is a recommended accessory for everyslot chuck. Application: ❍ cover the chuck completely with the foil❍ lay workpiece on to chuck in area nearest vacuum

supply❍ draw round workpiece❍ pierce foil within the contour of workpiece. All kinds of workpieces can be clamped using this method.After use the foil is simply peeled off. No rest-adhesiveremains on the chuck.

Covering foilThe foil thickness is: 0,06-0,11mm

The application is similar to using a rubber

adapter mat (see page46). The difference is

that the foil is cut alongthe slot using a knife.

The workpiece shouldhave an even and flat

surface for optimal results

CLAMPING PLATES VACUUM CLAMPING SYSTEMS50

ICE-VICE© Freeze clamp technology

Clamping by freezing on a thin water film

Workpieces can now be clamped for machiningsimply, accurately and tension-free using ice.Place the workpiece on the previously cooledplate and spray a thin film of water onto plate andworkpiece. Approximately 90 seconds later theworkpiece is frozen to the working surface. Expe-rience has shown that a temperature of –10° hasproven to be ideal for freeze clamp technology. At–10° the ice has not yet become brittle andcracked. By using custom-built adapter platesworkpieces are positioned and clamped withrepeatable accuracy. The use of coolants shouldbe avoided during machining. If this is not possi-ble we will gladly suggest or quote alternatives.We differentiate between two alternative methodsof freezing workpieces:

1.) Ice-Vice©-System

1.1) The so-called Ice-Vice clamping system com-prises of two main components, the cooling unitand the freeze plate. With the help of integratedelectronics a closed cooling system within thesetwo components controls the temperature, whichcan be chosen freely and the set value remainswithin a tolerance of +/-2°. Sensors check thisprocedure constantly. The ideal temperature isgiven at –10°. The micro electronic controls checkall functions.

1.2) Two freeze plates can be connected simulta-neously to the cooling unit. This means two inde-pendant freeze plates can be used on two differentmachining centres.

1.3) After setting the ideal temperature accordingto experience, accuracy of +/-3µ can be achievedon the workpiece after machining.

1.4) Freezing the workpiece to the plate takes 90seconds. Thawing is supported by a heating car-

tridge (integrated in the freeze plate) and requiresapproximately the same amount of time. Ice-Vice© freeze plates can also be supplied witha vacuum connection for clamping workpiece spe-cific adapter plates in order to shorten clampingcycles. This works best when one freeze plate isin use on the machine while the other plate is in afreezing or thawing modus.

2. Ice-Vice© AFP System(Air Freeze Plate)

2.1) Cold air is produced by feeding in and com-pressing air at min 6 bar. This chuck can beconnected to any available air compressor. Inorder to achieve the required -6° – -10°C approx.6 bar of compressed air is necessary (these valuesare valid for an environment temperature of 20°C,but also for the temperature of the compressedair).

2.2) By using a switch the compressed air insidethe AFP plate can be changed round so that thecompressed air warms the plate in order to thawthe ice.

2.3) The AFP system is also available for use on alathe it has a steel base that can be clamped on amagnatc worktable.

For further information or a quotation please contact:

Europe: Rudolf Behn [email protected]

Overseas: Lesley Osborne [email protected] Jacob de Mol [email protected]

VACUUM CLAMPING SYSTEMS CLAMPING PLATES 51

Examples of workpieces and materials whichcan be machined using freeze clamp technology:

Glass and quartz parts which have to be held ten-sion-free for instance to remove samples orremove small parts from a profile.

Parts made of steel which have to be machinedtension-free

Complicated small plastic and graphite workpieces

Watch and clock parts

Aluminium and plastic housings

If you belong to one of the following trades, freeze clamp technology could be the solution youare looking for:

Processing and machining ceramics, manufacturing ceramics, processing graphite,semi-conductor industry, optical industry, watchmaker, glass processing, quartz processing,metal-machining, medicinal technology, smallparts stainless steel machining, laboratories inhigh schools and institutes

Machining at MOTOROLA

Machining small graphite workpieces

Metalcutting

Milling of honeycombstructure

Comparison betweenmilling tool and ballpoint

Ice-Vice© chucks in pallet form are used to increase productivity

CLAMPING PLATES VACUUM CLAMPING52

ICE-VICE© freeze chucks

As in many other technical procedures the ideafor development of freeze clamp technologycame from nature itself.

During clamping with Ice-Vice systems workpie-ces are frozen tight onto a chuck for machiningby a capillary film of water. Also for relativelyuneven workpieces the gaps are filled completelywith water and thereby fozen. The adhesion,detaching and shearing forces are strong enoughto be able to mill, grind, drill or polish parts. ICE-VICE©-freeze plate with an even contact

surface for freeze-clamping flat-lyingworkpieces

Clamping by freezing on a thin water film


ICE-VICE© freeze plates

ICE-VICE©- Freezeplate with cavity forfreezing unevenlyshaped or unstableworkpieces

Workpiece frozen with gel

No. lxwxh area dm2

91440 125x150x105 1,88

91441 125x200x105 2,50

91442 125x300x105 3,75

91443 150x150x105 2,25

91444 150x200x105 3,00

91445 150x250x105 3,75

91446 150x300x105 4,50

91447 200x200x105 4,00

91448 200x250x105 5,00

91449 200x300x105 6,00

91450 200x500x105 10,00

91451 320x320x105 10,24

91640 Additional vacuum suction connection Also available in special sizes!


ICE-VICE© supply unit

ICE-VICE© supply unit with two regular coolingcycles for using two freeze plates independantly;While one freeze plate is being used for machiningthe other can be prepared. After machining is finis-hed the plate can be switched to thaw and theworkpiece removed.

No bxhxt Connection kg

91439 540x770x760 400V/50Hz 65

92365 540x770x760 400V/50Hz, 2-3kW 65

92366 540x770x760 400V/50Hz, 65Prec. control unit

Supply includes:

4m electric cable3m coolant connection

Nr bxhxt Anschluss kg

88156 420x850x680 400V/50Hz 50

Aggregat mit einfachem Anschluß für nur eineGefrierspannplatte maximaler Größe 150x250mm.


Vacuum adapter plates for ICE-VICE©

Nr Name Dim

34992 Vacuum adapter plate 125x200











ICE-VICE freeze plate with 400 workpieces frozen on the surface


Fragile, unstable parts are clamped gently andsecurely.No deformation or breaks arise during clampingprocedure.

Almost all materials can be clamped. Composi-tes, graphites, ceramic, rubber and also difficulthoneycomb structures, which usually have com-plete hollows, can be clamped easily with aclamping force of upto approx. 140N/cm2.

ICE-VICE©-AFP Freeze plates

Producing cold with compressed air


ICE-VICE©-AFP Freeze plates

Palletizing possibilityFreeze plates can be usedfor fast exchange

Fixture for holding workpieces onlathe. Can be used for varying diameters

Also available in special sizes!

Nr Name dim

91641 Freeze plate AFP-140 100x140

91642 Freeze plate AFP-250 150x250

92367 Adapter plate f AFP-140 7x100x140

13052 Silencer

91643 Freeze plate AFC-20 ø20mm

92539 Gefrierspannfutter AFC-IOL-20 ø20mm

92540 Ersatz-Gefrierspannpl. AFC-IOL-20 ø20mm

92541 Gefrierspannfutter AFC-55 ø55mm

92542 Ersatz-Gefrierspannpl. AFC-55 ø55mm

92543 Gefrierspannplatte AFC-80 ø80mm

Silencer # 13052


Perforated-grid chucks - special version

Highly accurate vacuum chucksused in photo-optical processesi.e. extremely accurate clampingof printing plates or opticalfilms/foils. Used on machines forthe manufacture of printing pla-tes during laser and UVexposure; exposure of film-foilsor for thin aluminium base pla-tes. Special dimensions, alsodivision of suction area in severalareas or sectors are available onrequest; i.e. Perforated gridchuck 1.400mm x 2.000mm with30µ accuracy.

Perforated-grid chuck with eccentric end stops

Peforated-grid chuck for exposure machine

These vacuum chucks are made according to customer’s request and machine specification.Please use the form on page 98 for your inquiry

FLIP-PODTM-clamping system for a CNC deburringmachine, used on aeroplane parts

VACUUM CLAMPING SYSTEMS WITTE FLIP-POD TM 59

FLIP-PODTM

vacuum system

The FLIP-PODTM vacuum clampingsystem has been developed forclamping large workpieces in alumi-nium, plastics or wood.This system can be used on CNCmilling or grinding machines.

The advantages at a glance:

❍ thanks to a controlled vacuum supply, the workpiece remains in the correct position at all times during machining

❍ FLIP-PODTM is a modular system and can be used on all common CNC milling machines and even for drilling work

❍ when not in use all pods store inside the hollows of the pod plate. They are available at any time for a fast changeover from one machining job to another

❍ FLIP-PODTM reduces preparationtimes between workpiece changes and thereby increases productivity

Application demonstating active and inactive FLIP-PODTMs

FLIP-PODTM vacuum chuck 6mlong made up of three segments

WITTE FLIP-POD TM


FLIP-PODTM Vacuum system

The round polymer pods (1) protrude out of the pod plate when in use. The pods not required lie in arecess cavity (2) of the pod plate. Simply flipping them over activates or deactivates the pods.

FLIP-PODTM clamping system in working position prepared for a large aluminium workpiecewith cutouts

1

2


No. Description Area/Grid PODS

83100 FLIP-PODTM Set 100 1m2/100mm 100




FLIP-PODTM

Vacuum system

No. Name Pcs

11392 FP Unit 100

11393 FP Sucker 100

11394 FP Center hole gasket 100

11395 FP Large gasket 100

82136 FP Retractable locator pods 3

82137 FP Fixed locator pods 3

Supply FLIP-PODTM Set 100 includes

ALU FLIP-PODTMRetractable and fixed locator pods

The cross section drawing shows how the pods work.Simply „flipping“ them over puts them in working position. They areautomatically switched on when the operator turns them over. Allactive pods stand 26mm above the pod plate surface, allowing con-tour milling and recess cutting on the outer contours.

Fixed and retractable locator podsensure high accuracy. Locator pods are available in both fixed andretractable versions, either of which fit in any pod cavity.After positioning the workpiece the retractable pods are drawn backinto the pod plate as soon as vacuum is switched on, allowing a freepath for the cutting tool.

Alu FLIP-PODTM has an accurate, defined workpiece surface.Height tolerance is only 50µ. They are suitable for face machining onboth surfaces, especially of metallic workpieces.

FLIP-PODTM Sets, polymer version

FLIP-PODTM with sucker

Complete Witte FLIP-PODTM

Alternative version

WITTE FLIP-POD TM


FLIP-PODTM Accessories and spare parts

I

II

III

IV

No. Description

11392 FP Unit complete with filter element and ball

11393 FP Sucker, which is mounted onto the unit

11395 FP Large seal for the upper seal slot

11394 FP Center hole seal for the pod cavity

I

II

III

IV



No. Description

82136 FP Retractable locator pod automatically retract when vacuum is applied

82138 FP Polymer-Half-Pod (1/2),

11396 FP Lift ring 1/2“

85662 FP Transfer PodFor easy positioning of large workpieces over the Flip-Pods

I

I

I

III

II

IIIIIIV

II

IV

IV

Witte Transfer FLIP-PODTM,polymer version

WITTE FLIP-PODTM



No. Name

82137 FP Fixed locator podsincl. unit, pins and spacer disks

89093 FLIP-PODTM-Video

I

II

II

VACUUM CLAMPING SYSTEMS WITTE FLIP-PODTM 65

The sketches show a range of possible pod panel designs.

Pod -Plate, ready for use, with ALU FLIP-PODTM´s

The user can choose the panel design that best suits the parts being machined. The pod panel canbe laid out in almost any design and combination.

WITTE FLIP POD TM


ALU FLIP-PODTM Accessories and spare parts

II

No. Name

84408 FP Complete with seal, filter element and ball (85662 and 11395 order seperately)

30584 FP Seal for Alu-Pod

12124 FP Polymer Ball ø15,8mm

12125 FP Filter ø61x3mm

11395 FP Large Seal for Pod Plate ø88x4,5mm

11394 FP Center hole gasket for pod cavity ø38x6mm

I

IIIIIIVV

VI

Witte ALU-FLIP-PODTM in its basic statewithout seals

ca.

IV

V

VI

I

III

VACUUM CLAMPING SYSTEMS WITTE FLIP POD TM 67

ALU FLIP-PODTM Accessories and spare parts

No. Name

85328 FP Alu Half-Podincl. 1m seal ø5mmI

Half pod, alu

WITTE FLIP POD TM


Height adjustable ALU FLIP-PODTM

No. Name

90628 FP Height adjustable ALU Flip-Pod (special shape)

90860 FP Height adjustable ALU Flip-Pod

I

I

II

II

VACUUM CLAMPING SYSTEMS APPLICATIONS 69

1. 1. Workpieces frozen on Ice-ViceTM

2. Vacuum plate for clamping the housing of a Lap-top

3. Clamping fixture for micro-chip cards

4. Circular chuck ø1500mm

5. Vacuum cube with integrated storage tank and distribution manifold, approx. 800x800x900mm, used on machining centre with automatic 24 hour pallet exchange system. Parts held with vacuum during machining, transport and standing times.

1

2

3

5

4

CIRCULAR CHUCKS VACUUM CLAMPING SYSTEMS70

Circular grid type chucks

No. Grid dim. Dia.xh kg

80836 10,0 ø100x38 1

80837 10,0 ø125x38 1

80838 10,0 ø160x38 2

80839 10,0 ø200x38 3

80840 10,0 ø250x38 5

80841 12,5 ø315x48 5

80842 12,5 ø400x48 16

80843 12,5 ø500x58 31

80844 12,5 ø630x58 49

No. Grid dim. Dia.xh kg

80845 10,0 ø100x38 2

80846 10,0 ø125x38 3

80847 10,0 ø160x38 6

80848 10,0 ø200x38 9

80849 10,0 ø250x38 14

80850 12,5 ø315x48 14

80851 12,5 ø400x48 47

80852 12,5 ø500x58 89

80853 12,5 ø630x58 142

Aluminium Steel

These circular chucks are ideal for disk or circular typeworkpieces for machining i.e. on a lathe. They are used in glassand polymer processing industries, but metal machining is ofcourse also possible.

Supply includes:

Seal 10m (h=38mm) or 20m(from h=48mm), 4 stops


VACUUM CLAMPING SYSTEMS CIRCULAR CHUCKS 71


Circular grid chucks, special dimensions andspecially designed. Othercircular chucks are shown on page 17 and 37

CIRCULAR CHUCKS VACUUM CLAMPING SYSTEMS72

Circular sinter metal chucks

No. Diaxh kg

80854 ø100x38 0,8

80855 ø125x38 1,3

80856 ø160x38 2,0

80857 ø200x38 3,0

80858 ø250x38 5,0

80859 ø315x48 10,0

80860 ø400x48 16,0

80861 ø500x58 31,0

80862 ø630x58 49,0

No. Diaxh kg

80863 ø100x38 2,3

80864 ø125x38 3,5

80865 ø160x38 6,0

80866 ø200x38 9,0

80867 ø250x38 14,5

80868 ø315x48 29,0

80869 ø400x48 47,0

80870 ø500x58 89,0

80871 ø630x58 142,0

Aluminium Steel

The insert made of sinter bronze guarantees even and accurate clamping of different workpieces i.e. optical glass, wafer etc.Also available in METAPOR© see page 73


VACUUM CLAMPING SYSTEMS CIRCULAR CHUCKS 73

WITTE - METAPOR©-circular vacuum chucks

No. Øxh kg

90963 ø100x38 0,8

90964 ø125x38 1,3

90965 ø160x38 2,0

90966 ø200x38 3,0

90967 ø250x38 5,0

90968 ø315x48 10,0

90969 ø400x48 16,0

90970 ø500x58 31,0

90971 ø630x58 49,0

No. Øxh kg

90972 ø100x38 2,3

90973 ø125x38 3,5

90974 ø160x38 6,0

90975 ø200x38 9,0

90976 ø250x38 14,5

90977 ø315x48 29,0

90978 ø400x48 47,0

90979 ø500x58 89,0

90980 ø630x58 142,0

Aluminium Steel

Vacuum-circular chuck with an air through-flow, fine porous and homogenous insert.Especially for tension free clamping of very thin foils or similar materials.The insert can be produced in two different WITTE - METAPOR© materials,BF-100 and MC-100. Technical date can be found on pages 94/95.These materials can also be used for air film glide handling equipmentusing the standard quality BF 100.


82392

LIQUID SEPARATOR VACUUM CLAMPING SYSTEMS74

Liquid separators are indispensable whenevercoolants or lubricants are being used. Also actsas a retainer for dust, chips etc.

Advantages:❍ fluid level can be seen at all times

❍ aluminium and acrylic materials result in light weight

❍ easy handling due to its ergonomic design

Liquid separator

No. Volume lxbxh Hose connection kg

80200 5l ø200x400 LW12 4

82392 21l ø300x500 LW32 1080200

VACUUM CLAMPING SYSTEMS LIQUID SEPARATOR 75

Fully automatic operation isguaranteed with an integratedmagnetic valve and 2-chambersystem. The separator is set upbetween vacuum chuck andpump, thereby protectingvacuum pump from the largeamounts of fluid, which areabsorbed and dispersed.

The fluids, which are sucked in,are transported back to themachine by means of a hosesystem.

Clamping of the workpiece isnot interrupted at any time.

No. l Fluid- Separation for suction lxbxh Hose entrance Hose exit kgcapacity capacity l/h capacity m3/h inner Dim. inner Dim.

80155 2 100 bis 100 400x400x670 R 1 1/4“ R 1 1/4“ 8,5

82782 6 100 160-250 410x410x960 R 2 1/2“ R 2“ 15

Automatic liquid separator

80155

Electricity supply of 230V isnecessary for operation.Also available in 110V/60Hzversion.


Pressure regulator SwitchUsed to set underpressure on vacuum units,is infinitely adjustable. Switches off automa-tically when set vacuum is reached andswitches on again when vacuum dropsbelow permitted range

❍ setting range from 0 - 99,8% vacuum ❍ vacuum range approx 70 mbar❍ made of black polymer

The switch has two fixing bores for fillisterhead cap screws M4 DIN 912

No. lxwxh U kg

80411 70x30x30 ≤ 250V 0,07

Vacuum Switch with LED DisplayVacuum switch with adjustable limit values.Used as safety switch

Electronically controlled LCD Vacuumdisplay showing 7 different units, lettersize11mm, display in red or green:0 to 1,013 bar (0 to 101,3 kPa)mmHG, kgf/cm2, Inch/HG, PSI, kPa, MPa.

Top and bottom vacuum limits freelyadjustable.

Adjustable response time 2,5 to 500 ms in 4Steps.

Can be used in N.O. (normal open) or N.C.(normal closed) state.

2 Vacuum suction bores R1/8“ can be usedoptionally in 90° position.

The cable 4,5x1,8, 2m long is connected tothe machine control. Should the minimumvacuum drop below preset value the switchsend a signal to the machine to stop

No. Dim. U kg

84886 40x31, 5x37 24V 0,05

The delivery includes:

Operation manual, 2 mounting brackets, blind plug, 2 screws M3, display unit label

Nr. 92264


No. Name for hose inner Dia. Voltage

85466 Safety appliance with electronic vacuum switch ø12mm 24 Volt






The German Employer’s Liability Insurance Asso-ciation demands that machines having power-operated workpiece clamping devices must bedesigned and installed in such a way that the dri-ving spindle or feed mechanism can only beactivated after completing the fixing or clampingprocedure.

The safety appliance is a must for all jobs onheavy-duty machines and can be integrated intothe machine controls.

When the vacuum drops below the pre-set value(infinitely adjustable) a visual signal is given. Thebuilt-in dead changer is integrated into themachine controls and sets off an emergencystop of spindle or feedstop.The range between maximum and minimumvacuum is 70 mbar.

This version with magnetic valve allows theclamping procedure to be activated from themachine control panel.

Safety appliance


O-shaped sealUsed for sealing gridchucks or workpiece speci-fic contours. This high qua-lity neoprene seal is placedinto the suction slot of avacuum grid type chuck torestrict the clamping area.(i.e. see page 35) The sealdiameter is dependant onthe cross section of theslot. If a plate is remachi-ned then a seal with asmaller diameter will berequired.Minimum order quantity50m/per diameter

No. Diameter

00188 ø 2,0mm

00069 ø 3,0mm

00170 ø 3,5mm

00070 ø 4,0mm

00157 ø 4,5mm

00071 ø 5,0mm

00171 ø 5,5mm

00072 ø 6,0mm

00172 ø 6,5mm

00073 ø 7,0mm

00251 ø 8,0mm

00316 ø 10,0mm

Vacuum grease

Used from time to time for thefollowing:

❍ greasing suction hose❍ sealing off workpieces with rough

or scored surface

No. Name Cont. kg

80140 Vacugrease 250g 0,29

No. Thread Hose nozzle

90716 R3/8” 3 x LW12

90717 R1/2” 3 x LW18

90718 R1/2” 1 x LW18, 2 x LW12

Y distributor with female thread

VACUUM CLAMPING SYSTEMS ANWENDUNGEN 79

Vacuum chuck for bottle tops in quality control

Picture shows a special sinter metal vacuum fixture used in quality control department of CDmanufacturer

Custom built vacuum chuck for the aerospaceindustry


Manifold distributors

All manifolds are supplied with correspondinghose-nozzles and on each exit there is a 3/2 wayaerated vacuum valve with a vacuummeter

The manifold can be upgraded to a safety appliance when assembled together with a safety pressure switch (80411, see page 76).Connection threads R 1/8“ with blind plugs arealready in place.

No. Description Entrance Exit lxbxhconnection connection

84389 Manifold distributor 1xLW18 4xLW12 43x43x300

85680 Manifold distributor 1xLW24 3xLW18













Supply includes:

Hose nozzle for vacuum pump exit, hose nozzleand aerated 3/2 way hand valve for eachconnection exit, vacuum gauge

Various types available on request!



Rotation joints

Supply includes:

1,5m hose, plus connection parts

II

I

Ideal for using with

❍ circular vacuum chucks on lathes with a hollow spindle

❍ vacuum chucks on a rotating machine table with hollow spindle

The Witte rotation joint allows rotary movementof circular or normal chuck but with a stationaryvacuum supply without any vacuum loss.

Standard rotation joints are available for threeRPM ranges: upto 1500, 3000 and 6000.

They come complete with polymer tubing, whichconnects the chuck through the hollow spindlewith the rotation joint. It is the tubing which takesup the torque force


Rotation joints

Airfilter

No. max.RPM Dia l kg R

80261 1500 35 85 0,3 3/8“-3/8“

80262 3000 50 110 1,0 1/2“-3/8“

80910 6000 50 110 1,0 1/2“-3/8“

III

No. H ø R Filter#

83324 110 105 3/4 80142

83322 120 140 11/4 80143

Filter-cartridge

III

Other sizes available on request!

II

I

Universally used dust filter, dirt immedia-tely visible through the transparenthousing. Designed to allow easyexchange of the filter cartridge.

A fitting filter cartridge is included in the package.

ø

R

R

H


All vacuum valves are 3/2 way withventilation. For safety reasons theelectro-magnetically operatedvacuum valves are always open.That means that even if the electri-city is cut off, the vacuum supplybore in the valve remains open,and supply of vacuum is guaran-teed. This is valid for 230 volt ACor 24 volt DC

1 = Pump

2 = User/Vacuumplate

3 = Air Intake

Vacuum electro-magnetic valves


Vacuum electro-magnetic valvesNo. Connection Pumpe Vacuum Vacuum Weight

thread max. m3/h min. max. kg

90960 1/4“ female/female 4 0,52

80908 3/8“ female/female 10 150mm/HG 759,50mm/HG 0,56

90961 1/2“female/female 20 1,19

84204 3/4“female/female 60 1,13

82997 1“female/female 90 610 Torr 0,5 Torr 1,62

84275 11/2“female/female 180 2,00

Supply includes:

24 volt solenoid and plug

Supply does not include nozzles or connectionelements. See next pages.

80908

8427582997

Other sizes available on request!


Foot switchNo. Connection thread

80322 R1/4“

Supply includes:

2 hose nozzles, 2x3mvacuum suction hose withwire spiral 18/12

Slide valve No. Connection thread

81322 1/8“ female/female



82961 1/2“female/female

No. Connection thread





82927 1“ female/female

80563 1 1/4“ female/female

83144 1 1/2“ female/female

Vacuum handvalve

Vacuum switch for vacuum chucksNo. Connection thread

84966 R3/8“

Siehe auch Abb. auf Seite 33


Vacuum gauges

No. Connection thread Diameter Range

80103 R1/8“ axial ø40 0 bis -1 bar

80100 R1/8“ radial ø40 0 bis -1 bar

80103Axial connection

80100Radial connection

Screw hose connection for slot-type vacuum chucks

No. Thread for hoseinner Dia.

10239 1/8“ ø 4,5

10414 1/4“ ø 6

Quick coupling with male thread

No. Thread for plug

80104 3/8“ 102711027510519

80989 1/2“ 102711027510513

84411 3/4“ 12079


Plug for quick coupling

No. for hoseinner diameter

10271 ø 6

10275 ø 8

10519 ø 13

12079 ø 19

Hose nozzles

No. Thread for hose WAFinner dia.

11561 1/8“ ø 9 14

10638 1/4“ ø 9 17

11768 1/4“ ø 13 17

10354 3/8“ ø 9 19

10269 3/8“ ø 13 19

10270 1/2“ ø 13 24

11508 1/2“ ø 19 22

11509 3/4“ ø 19 32

11746 3/4“ ø 25 32

11726 1“ ø 25 37

10471 1“ ø 32 37

10598 1 1/4“ ø 32 50

11620 1 1/2“ ø 50 53

11468 2“ ø 50 57


Reducers male/female

Screw hose connection

Double nipple, detachable

No. Thread


12110 3/8“ male/male

12072 3/4“ male/male

11479 1“ male/male

No. Thread Threadmale female

10542 1/4“ 1/8“

10681 3/8“ 1/8“

12113 3/8“ 1/4“

10302 1/2“ 1/8“

10743 1/2“ 1/4“

10299 1/2“ 3/8“

11455 3/4“ 1/8“

10896 3/4“ 3/8“

10316 3/4“ 1/2“

12107 1“ 3/8“

12108 1“ 1/2“

10636 1“ 3/4“

12109 1 1/4“ 1/2“

10637 2“ 1 1/2“

12359 1 1/2“ 1“

No. Thread for hoseinner dia.

10632 3/8“ LW9

10580 1/2“ LW12


Wire spiral hose

Spiral hose, polymer

No. Description innerdiameter

11380 Spiral hose, polymer ø30



Used with radial compressors

No. Bendable radius Outer/inner(minimal) diameter

00717 20mm ø13/8

00060 25mm ø18/12

00061 40mm ø25/18

00253 60mm ø34/25

00184 75mm ø40/32

00185 125mm ø60/50

Durable vacuum supply hose suitable for most chucks


Vacuum polymer tubing

Polymer hose

Please state length in metreswhen ordering

No. Description Outer/innerdiameter

00058 Polymer tubing, black ø8/6



No. Description Outer/innerdiameter

00004 Polymer hose, ø6/4white

Used with rotation joints

Used for slot-type chucks

WITTE METAPOR TM


WITTE-METAPOR© - Porous aluminiumInstead of bores for vacuum and air pressure - METAPOR© for vacuum and air pressure!

This unique porous aluminium compoundmaterial is suitable for die and mould,conveyance and clamping systems

Deep drawn form, made of WITTE - METAPOR©

❍ Evacuationvacuum mould-forms made of METAPOR©

vacuum chucks made of METAPOR©

i.e. for clamping electronic workpieces and foils

❍ Liftingair film glide handling equipment made of METAPOR©

❍ Through flowfor agitating bases and conveyor channels madeof METAPOR©

❍ Molding/Demouldingdeep drawn and die moulds made of METAPOR©

❍ Ceramic and machined forms made of METAPOR©

VACUUM CLAMPING SYSTEMS WITTE METAPOR TM 93

WITTE - METAPOR© BF 100 AL

Vacuum clamping technologyThe main feature of METAPOR© vacuum clamping systems issuction over the complete surface area without suction bores.Foils are held absolutely flat. The pressure drop, which takesplace within the structure means that it is not necessary tocover areas not in use. METAPOR© is ideally suited forholding foils and electronic parts as well as for mould-formsand soft workpieces.

Air film glide technologyThe pressure distribution in the METAPOR© structure allowseven surface airflow capacity, even if only part of the surfaceis covered. Air consumption and noise emission are consider-ably reduced. Trouble-free machining offers cost reduction onair flow components, a new perspective for rotation bearings,conveyance and extrusion beds.

Through-flow technologyThe microporous METAPOR© structure allows an even agita-tion of granulates and powders without bubbles ocurring.Low air consumption reduces friction and mechanical load.METAPOR© ideal for mixing processes, coating, conveyancetroughs and dismantling of silo bridges

Molding technologyDeep drawn moulds made of METAPOR© do not require anybores. Bore imprints on the workpiece are avoided. Suctionover the complete area allows structures to be complex with-out air pockets and distortions. The complete flow-through ofair prevents high-temperature areas developing. Rationalmachining procedure and immediate usability promise avaluable technological advantage

WITTE METAPOR TM


WITTE - METAPOR© BF 100 ALAvailable in the following dimensions:

No. lxwxh kg

00513 500x500x10 4,5

00552 500x500x15 6,8

00553 500x500x20 9,0

00554 500x500x25 11,3

00555 500x500x30 13,5

00556 500x500x35 15,8

00557 500x500x40 18,0

00558 500x500x50 22,5

00559 500x500x60 27,0

00560 500x500x70 31,5

00561 500x500x80 36,0

00562 500x500x100 45,0

00563 500x500x400 180,0

Technical data:

Density 1,78 g/cm3

Ball compression hardness 113Shore hardness D 81Brinell hardness HB 5/306,5 Norm EN 10003-1 69Tensile strength DIN 53455 28 N/mm2

Yield point DIN 53455 19,8 N/mm2

E-Modul DIN 53457 6460 N/mm2

Impact tenacity DIN 53453 11,8 kJ/m2

Compression strength DIN 53454 95 N/mm2

Average pore diameter 15 µmTotal porosity 15 %Open porosity 8 %

Thickness tolerance: -0/+0,3mmLarger dimensions available on request

The machineability of METAPOR© is excellent and can becompared to easily machineable aluminium. METAPOR© ismachined without coolant in order to keep the pores cleanBetter surfaces are achieved with high cutting values. Nonoticeable warmth developing in the workpiece can be feltduring machining.


WITTE - METAPOR© MC 100 ALAvailable in the followingdimensions:

No. lxwxh kg

00704 500x500x10 4,0

00705 500x500x15 6,0

00706 500x500x20 8,0

00707 500x500x25 10,0

00708 500x500x30 12,0

00709 500x500x35 14,0

00710 500x500x40 16,0

00711 500x500x50 20,0

00712 500x500x60 24,0

00713 500x500x70 28,0

00714 500x500x80 32,0

00715 500x500x100 40,0

Techical data:

Density 1,7 g/cm3

Ball compression hardness 113Shore hardness D DIN 53505 82E-Module DIN 53457 8600 N/mm2

Impact tenacity DIN 53453 3,5 kJ/m2

Average pore diameter 40 µmTotal porosity 26 %Porosity in comparisson to BF 100 AL 600 %

Thickness tolerance: -0/+0,3mm

Larger sizes available

A new porous material, developed for free-form surfaces.This material has larger pores to allow air to pass freely.This enables greater clamping forces during milling,without the need for extra bores.

WITTE METAPOR TM


WITTE - METAPOR© CE 100 WHITEAvailable in following dimensions:

No. lxwxh kg

00766 500x500x10 4,0

00767 500x500x15 6,0

00768 500x500x20 8,0

00769 500x500x25 10,0

00770 500x500x30 12,0

00771 500x500x35 14,0

00772 500x500x40 16,0

00773 500x500x50 20,0

00774 500x500x60 24,0

00775 500x500x70 28,0

00776 500x500x80 32,0

00777 500x500x100 40,0

Thickness tolerance: -0/+0,3mmTechnical details on request

Larger plates(i.e. 1m2 oder 2m2 glued plates supplied on request)

Witte Metapor CE 100 WHITE is an extremely fine porousmaterial with a pore size smaller than BF 100 or MC 100.The surfaces is white and easily workable.The material on the whole is very homogenous in its poro-sity. It has proven to be very useful in silicon-wafer produc-tion, also as a surface for „air handling equipment“, wherethe even distribution of the air flow promotes a vibrationfree gliding of the glide material.


WITTE - METAPOR© INOX 100 FEAvailable in following dimensions:

Nr lxwxh kg

00807 500x500x10 11,2

00808 500x500x15 16,8

00809 500x500x20 22,4

00810 500x500x25 28,0

00811 500x500x30 12,0

00812 500x500x35 33,6

00813 500x500x40 44,8

00814 500x500x50 56,0

00815 500x500x60 24,0

00816 500x500x70 67,2

00817 500x500x80 89,6

00818 500x500x100 112,0

Thickness tolerance: -0/+0,3mmTechnical details on request

Larger plates(i.e. 1m2 oder 2m2 glued plates supplied on request)

Unique porous, corrosion-free steelPorosity lies approx between that of METAPOR BF Al and MC 100 Al.Very good machinability. Also this material retains porosity after dry machining.A special difference to the BF, MC and CE materials is inthe substantially higher ball pressure hardness of INOX 100 FE.Especially usable as a base for cutting tables or as a replacement for sinter metal plates

INQUIRY-FORM VACUUM CLAMPING SYSTEMS98

Inquiry for vacuum equipment:Simply copy this form, complete and return to:Horst Witte Gerätebau – Vacuum Clamping TechnologyFax +49-(0)5854-8940 • Tel: +49-(0)5854-8937E-mail: [email protected] (Overseas)E-mail: [email protected] (Overseas)E-mail: [email protected] (Europe)

Request for:

In order to make a suitable quotation for your application,

we need following information:

What kind of material(s) are you machining:

What size(s) of workpiece are you machining:

Type of machining process (i.e. milling incl. speed and feed):

How much material is removed:

Is vacuum supply available:

Do you use coolants:

Grid chuck WITTE VAC-MATTM FLIP-PODTM

Slot plate WITTE METAPOR© Circular Chucks

Info Video Quotation on

Name

Company

Type of work

Postal code/Town

Street

Tel / Fax

VACUUM CLAMPING SYSTEMS TABLES 99

%Vacuum kPa mbar Torr -kPa -mmHg -inHg

100 0 0 0 101,3 760 3090 10 100 75 90 675 2780 20 200 150 80 600 2470 30 300 225 70 525 2160 40 400 300 60 450 1850 50 500 375 50 375 1540 60 600 450 40 300 1230 70 700 525 30 225 920 80 800 600 20 150 610 90 900 675 10 75 30 101,3 1013 760 0 0 0

Vacuum conversion table

Formula for determing holding forces

Atmospheric pressure

At sea level 0 m 1013 mbarOn the Zugspitze 2963 m 695 mbarOn Mount Everest 8848 m 330 mbar 1 bar = 10N/cm2

The pressure P is the result of the ratio to force F and area A

F= PxA = N/cm2

Example: Vacuumchuck 400x600mm;Vacuum unit with under pressure of 85% VacuumWhereby A= (40x60)2400 cm2

F=0,85N/cm2 x2400cm2 =2040N

F=PxA =0,85bar x 2400cm2 =8,5N/cm2 x2400cm2 =24000N

Units:P=N/cm2

F=NA=cm2

APPLICATIONS VACUUM CLAMPING SYSTEMS100

Vacuum clamping using Alu Flip-PodTM

to hold a Styropor-container

Alu Flip-Pod on a CNC controlled deburring machine

3

Witte’s registered trade marks :• ALUFIX • EUROFIX • FIXMES • POSIFIX • MEGALU • Gigalu • VAC-MAT • VACUCOMB •

D E S I G N B Y

( H O R S T W I T T E )

AluminiumClamping Systems

Alufix Clamping System

Alufix XL Clamping System

Alufix XS Clamping System

FIXinspect Measuring Accessories

Alufix Expert Software for automaticfixture designing

HORNDORFER WEG 26-28D-21354 BLECKEDETEL. +49 (0)5854 / 890FAX +49 (0)5854 / 8940

WWW.VAKUUMSYSTEME.DE

E-MAIL: [email protected]

HORST WITTE GERÄTEBAU

Documents

clampingtechnology - brixis.co.uk · Witte Gerätebau Horst Witte Gerätebau, founded 1969, manufactures not only their own range of products but also ultra precision products for