Linear Drives - VG Scienta

Linear Drives 

Item Page 

Introduction to Linear Drives........................................................244 

Push Pull Drives LDP Series ...........................................................245 

Screw Drives LDS Series ................................................................248 

LDM Micrometer Series .................................................................251 

Linear Motion Thimble LM Series ................................................253 

Linear Transfer Mechanism LTM Series ......................................254 

Z Only Translators TR Series .......................................................255 

Linear Translator Shift LTS Series ................................................257 

243

Linear 

Drives 

Linear Drives 

Introduction to Linear Drives 

• Wide range of travels as standard 

• Fully bakeable to 250 ºC as standard (400 ºC 

if dismantled) 

• Different versions allow greater flexibility 

• Interchangeable between versions 

• 1x10 -11 mbar to 1 bar pressure range 

• Motorised types 

• Micrometer types 

• Pneumatic types 

• Push/pull types 

• Manual screw types 

There are many requirements to linearly move 

items inside vacuum. This movement is normally 

small in distance and can be of high or 

low accuracy. It can range from the opening and 

closing of a shutter to moving electron optics 

nearer to a loaded sample. 

VG Scienta has a wide range of products 

designed to overcome the problems associated 

with such simple translations. 

The devices in the LD series consist of a linear 

motion probe that can be moved in relation 

to its mounting flange from 25 mm to 150 

mm with a smooth and reliable operation. The 

method of actuation used differs between the 

three ranges, each allows different accuracies 

and speeds of movement to be achieved. Edge 

welded high quality UHV bellows are used in the 

construction of the drives. 

There is a choice of either light or heavy duty 

probe mounts across the LD linear drive series 

which is determined by the choice of mounting 

flange, either 34 mm or 70 mm Conflat. All of 

the versions are bakeable up to 250 ºC as standard, 

but can be baked to a maximum of 400 ºC 

if further dismantling is undertaken. 

In addition, VG Scienta supply a range of other 

linear drive components for more specialist 

applications. These include longer precision 

linear travels, or the capability of moving large 

diameter objects into a vacuum chamber. These 

devices are also described in this section. 

244 www.vgscienta.com

Introduction to the LPD Series Push Pull 


• Manual knob actuator 

• Linear non-rotating probe 

• Position lock 

• Pneumatic versions available 

• Manual versions bakeable to 250 ºC 

standard, 400 ºC with some components 

removed 

• Pneumatic versions bakeable to 150 ºC 

• Limit switch kit (reed switches) available for 

pneumatic versions 

www.vgscienta.com 

Push Pull Drives - LDP Series 

LDP Series Push Pull Drives 

Flange OD Dimensions Shipping 

mm inch Travel Operation Position Scale L R E Weight kg Order Code 

34 1.33 25 Manual YES 264 90 116 2.0 ZLDP925 




70 2.75 25 Manual NO 140 33 58 2.5 ZLDP225 

70 2.75 50 Manual NO 174 41 92 3.0 ZLDP250 

70 2.75 100 Manual NO 241 58 160 3.5 ZLDP210 

70 2.75 150 Manual NO 308 74 226 4.0 ZLDP215 

34 1.33 25 Pneumatic NO 269 90 116 3.0 ZLDP925P 






Limit switch kit for all pneumatic versions (2 reed switches) ZLDPRSK2 

All dimensions in mm unless otherwise stated. 

Please note that pneumatic versions over 100 mm in travel are not available. 

Dimensions are shown in the drawings on page 246 and 247. 



245




All dimensions in mm. 

ZLDP9xx series manual push pull drive on 34 mm OD flange. 

ZLDP2xx series manual push pull drive on 70 mm OD flange. 

LDP Series - Accessories 

Lubrication Kit Order Code 

ZLDP9 series ZLUBEK 




ZLDP9xxP series pneumatic push pull drive on 34 mm OD flange. 

ZLDP2xxP series pneumatic push pull drive on 70 mm OD flange. 



LDP Series - Accessories 

Lubrication Kit Order Code 



Limit Switch Kit (1) 

Fits all pneumatic version - 2 reed switches ZLDPRSK2 

(1) Reed switches are supplied with flying leads. They are bakeable to 150 ºC. 



247



Screw Drives - LDS Series 

LDS9 Series Screw Drives on 34 mm OD Flange 

Introduction to the LDS Series Screw 


• Manual hand wheel actuator 

• Linear non-rotating probe 

• Stepper motor driven versions available 

• Resolution of 0.02 mm 

• Motorised versions bakeable to 230 ºC 

with some components removed 

• Position lock 

• Manual versions bakeable to 250 ºC 

standard, 400 ºC with some components 

removed 

• Microswitch upgrade kits are available for 

the stepper motor drive options 


mm inch Travel Operation Scale L R E Weight kg Order Code 

34 1.33 25 Manual 0.02 139 90 116 2.0 ZLDS925 

34 1.33 50 Manual 0.02 172 90 141 2.5 ZLDS950 

34 1.33 100 Manual 0.02 240 90 192 3.0 ZLDS910 

34 1.33 150 Manual 0.02 307 90 242 3.5 ZLDS915 

34 1.33 25 Stepper Motor None 234 90 116 3.0 ZLDS925M (1)(3) 




34 1.33 25 DC Motor None 296 90 116 3.0 ZLDS925D (2) 





LDS2 Series Screw Drives on 70 mm OD Flange 


mm inch Travel Operation Scale L R E Weight kg Order Code 

70 2.75 25 Manual 0.02 139 33 58 2.5 ZLDS225 

70 2.75 50 Manual 0.02 172 41 92 3.0 ZLDS250 

70 2.75 100 Manual 0.02 240 58 160 3.5 ZLDS210 

70 2.75 150 Manual 0.02 307 74 226 4.0 ZLDS215 










(1) Drive is assembled to stepper motor and is supplied with a wired connector to suit VG Scienta's stepper motor control system. A separate 

mating connector is available. See pages 376 to 379. 

(2) DC Motor supplied with power supply - see page 375. 

(3) Microswitch upgrade kits are available - refer to pages 249 and 250. 



Screw Drives - LDS Series 34 mm OD Flanges 

ZLDS9xx manual linear drive, 34 mm OD flange. 

ZLDS9xxM stepper motor drive, 34 mm OD flange. 

ZLDS9xxD DC motor drive, 34 mm OD flange. 


LDS Microswitch Upgrade Kits 

Drive Order Code 

ZLDS925M ZLD925RM 






249



Screw Drives - LDS Series 70 mm OD Flanges 


ZLDS2xx manual linear drive, 70 mm OD flange. 

ZLDS2xxM stepper motor drive, 70 mm OD flange. 

ZLDS2xxD DC motor drive, 70 mm OD flange. 

LDS Microswitch Upgrade Kits 

Drive Order Code 






Introduction to the LDM Micrometer 

Series 

• Micrometer driven drives 

• 230 ºC bakeout assembled 

• 400 ºC bakeout with some components 

removed 

• Axial load 25 N 

• Available in 25 mm or 50 mm stroke 


Micrometer Drives - LDM Series 

LDM Series Micrometer Drives 

Flange OD Micrometer Shipping 

mm inch Travel Operation Resolution, mm Weight kg Order Code 

34 1.33 25 Micrometer 0.01 3.0 ZLDM925 




Drive Lubrication Kit 

ZLDM9 Series ZLUBEK 

ZLDM2 Series ZLUBEK 


ZLDM925 micrometer drive on 34 mm OD flange. 



251



Micrometer Drives - LDM Series 






LM Linear Motion Thimble 

• 34 mm OD mounting flanges 

• 25 mm travel 

• Fully bakeable to 350 ºC as standard 

• 10 -11 mbar to 1 bar pressure range 

• LM925 has 0.05 mm thimble graduation 

• Flanges tapped to reduce overall length 



Linear Motion Thimble - LM Series 

LM Series Linear Motion Thimble 

Flange OD Travel Graduation A B C D E Shipping 

mm inch mm mm Extended Compressed ID OD Thread Weight kg Order Code 

34T 1.33 25 0.05 70 45 15.6 48 M4 2.5 ZLM925 



ZLM925 ZLUBEK 



253



Linear Transfer Mechanism - LTM Series 


LTM Series Linear Transfer Mechanism 

Linear Transfer Mechanism LTM 

• Range of travel 25 to 100 mm 

• Easy adjustment 

• Graduated scale in 1mm increments 

• Fully bakeable to 250 ºC 

• Operating temperature range -20 ºC to 

+200 ºC 

• Fitted with tapped flanges at both ends 

• Positive stops at extremes of movement 

• Motorised resolution is 0.25 μm per half 

step 

Specifications 

Clear bore through bellows 38.0 mm 

Parallelism of flange faces Within 

0.04 mm/cm 

Concentricity of flange bores Within 0.5 mm 

Approximate torque required to elevate 1.2 Nm 

Maximum applied axial load 200 N 

Maximum applied radial load (to small pillar) 50 N 

Operating pressure range 1 bar to 10-11 254 www.vgscienta.com 

mbar 

(1) 70T mounting flanges have M6 tapped bolt holes. 

(2) Drive is assembled to stepper motor and is supplied with a wired 

connector to suit VG Scienta's stepper motor control system. A 

separate mating connector is available. See pages 376 to 379. 

(3) Motor must be removed for bakeout. 

(4) DC Motor is supplied with power supply - see page 375. 

A A B B Bake Shipping 

Flange OD (1) Exten- Com- Exten- Com- Temp Weight 

mm inch Travel Operation ded pressed ded pressed °C kg Order Code 

70T 2.75 25 Manual 63 38 159 134 250 3.2 ZLTM25 

70T 2.75 50 Manual 92 42 215 165 250 3.4 ZLTM50 

70T 2.75 75 Manual 125 50 258 183 250 3.8 ZLTM75 

70T 2.75 100 Manual 163 63 310 210 250 4.2 ZLTM100 

70T 2.75 150 Manual 215 65 434 284 250 (3) 4.6 ZLTM150 

70T 2.75 25 Motorised 63 38 162 137 250 (3) 4.4 ZLTM25M (2) 





70T 2.75 25 DC Motor (4) 63 38 162 137 250 (3) 4.4 ZLTM25DC 







ZLTM Series ZLUBEK

Introduction to Z-only Translators 

• Z travel ranges are 150, 300, 450 and 600 mm 

• Screw drive for all Z ranges (optional worm 

drive for longer travels, recommended for 450 

and 600 mm translators) 

• Z resolution 0.01 mm manual, 0.005 mm 

motorised 

• Linear motion per turn is 2 mm (wormwheel 

drive 4 turns) 

• Clear bore of 33 mm (without support tube) 

for larger bore Z only translations (up to 50 

mm clear bore) see Omniax translator 

modules 

• Mounting flange is 70 mm OD Conflat 

• Top flange is 70 mm OD Conflat tapped 

(clearance hole option at time of order) 

• Bakeout temperature to 230 ºC fully 

assembled (motors and switches removed) 

• Any mounting orientation 


Z-only Translators - TR Series 

TR Series Dimensions 

Z Travel 

Model Extended Retracted B 

ZTR1570 279 129 314 

ZTR3070 466 166 499 

ZTR4570 652 202 685 

ZTR6070 815 215 849 


TR Series Z-only Translators 

Flange OD Z Travel 

mm inch Extent Resolution Order Codes 

70 2.75 150 0.01 mm (1) ZTR1570 

70 2.75 300 0.01 mm (1) ZTR3070 

70 2.75 450 0.01 mm (1) ZTR4570 

70 2.75 600 0.01 mm (1) ZTR6070 

(1) Resolution of motorised drive is 0.005 mm. 




255



Z-only Translators - TR Series 

TR Series Options and Accessories 

• Support tube: 

31.7 mm OD and 28.5 mm ID 

• Feedthrough Chamber: 

70 mm OD top and bottom flanges with 3 

mini flanges for services. This is necessary 

with an RD1/2 using support tube. 

• Support Bearing: 

housing with bearings for 9.52 mm (3/8”) 

diameter rotary shaft support, with outlet 

ducts for cabling/cooling 

Z-only Translators - Options and Accessories 

• Motorised Z travel: 

stepper and limit switches option 

• Optional Support Stand: 

for horizontal mounting 

• Worm Drive: 

for longer travel translators and vertical 

operation (excluding ZTR1570). 

Description Order Code (1) 

Feedthrough chamber with 3 mini ports ZTRFC 

Support tube ZTRST 

Support bearing ZTRRB 

Support stand for horizontal mounting ZTRS 

Worm drive kit ZTRWD 

Stepper motor kit for factory fit and retrofit ZTRSMK (2) 

DC motor kit for factory fit and retrofit ZTRDCMK (3) 

ZTR series lubrication kit ZLUBEK 

(1) If ordered together, the different items will be supplied fitted and configured. 

(2) Drive is assembled to stepper motor and is supplied with a wired connector to suit VG Scienta's stepper motor control system. A separate 

mating connector is available. See pages 376 to 379. 

(3) DC motor is supplied with power supply - see page 375. 


Introduction to the Linear Translator 

Shift LTS Series 

• High load capacity 

• Z travel 50 to 250 mm 

• Fully bakeable to 230 °C 

• Adjustable travel stops 

• Coarse or fine manual drive 

• Mounting flange 114 mm, 150 mm and 200 

mm OD 

• Large clear bore diameters 

• 0.4 mm travel/turn fine drive with handwheel 

• 4 mm travel/turn coarse drive via drive nut 

and socket 

Linear translator shifts are heavy duty translators 

designed to move large objects accurately in and 

out of a vacuum system. Three sizes of bellows 

and a variety of Z stroke lengths are available. 

The unit is intended primarily for vertical operation 

with the load supported load on the Z axis. 

The VG Scienta technical department should be 

consulted for alternative orientations. 


Linear Translator Shift - LTS Series 

The Z motion is provided through three equispaced 

lead screws which are synchronously 

driven by a drive chain. Manual operation is 

provided by a nut attached to the chain tensioner, 

or alternatively by an optional handwheel 

assembly operating through a wormdrive reduction 

system. 

The lead screws are firmly mounted to the fixed 

base flange to provide cantilever and strut support 

as well as providing Z motion. All translators 

have additional stainless steel precision 

guide rods running in bronze bushings. 



257



Linear Translator Shift - LTS Series 

Spares and Accessories 

LTS Series Linear Translator Shift 

Max Loading 

Flange OD Vertical Horizontal Shipping 

mm inch Travel A B C D Bore kg (1) Nm (2) Weight kg Order Code 

114 4.50 50 175 125 220 17.5 68 300 25 6.0 ZLTS0405 

114 4.50 100 240 140 220 17.5 68 300 25 7.0 ZLTS0410 

152 6.00 50 175 125 257 15.0 101 260 38 8.0 ZLTS0605 

152 6.00 100 240 140 257 15.0 101 260 38 9.0 ZLTS0610 

152 6.00 150 305 155 257 15.0 101 260 38 10.0 ZLTS0615 

152 6.00 200 365 165 257 15.0 101 260 38 11.0 ZLTS0620 

152 6.00 250 430 180 257 15.0 101 260 38 12.0 ZLTS0625 

203 8.00 50 175 125 308 13.0 152 130 50 10.0 ZLTS0805 

203 8.00 100 240 140 308 13.0 152 130 50 11.0 ZLTS0810 

203 8.00 150 305 155 308 13.0 152 130 50 12.0 ZLTS0815 

203 8.00 200 365 165 308 13.0 152 130 50 13.0 ZLTS0820 

203 8.00 250 430 180 308 13.0 152 130 50 14.0 ZLTS0825 

Optional handwheel kit see below ZLTSHWK 


(1) For off centre loads, please contact VG Scienta technical support department. 

(2) Horizontal moment is from the system mating flange. 

LTS Spares and Accessories 

LTS Drive Order Code Lubrication Kit Hand Wheel Kit 

LTS04 series ZLUBEK ZLTSHWK

Linear Drives - VG Scienta

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