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Linear Bellows Drive Linear Bellows Drive 1 Linear Bellows Drive 2

Linear Bellows Drive

Bellows-sealed, precise lead-screw driven linear motion solutions for low load applications in ultra-high vacuum. Available in CF16 and CF35 flange sizes with stroke length options from 25mm to 150mm. Manual or stepper motor actuation options.


  • 316L high-quality bellows
  • 10,000 cycle guarantee
  • Simple to motorise retrospectively
  • High resolution performance: 10 micron manual, 1 micron motorised
  • 25N (5.6 lbf) axial thrust
  • Bakeable to 250°C with motor removed

The Linear Bellows Drives (LBDs) are a range of ultra-high vacuum compatible, bellows-sealed devices that provide smooth and reliable linear motion solutions for low load applications.

The CF16 flange versions of the LBD are typically available from stock, and are ideal for simple linear motion applications through to precise positioning such as beamline diagnostics.

CF35 flange versions are available at an additional cost.

The LBD is manufactured and assembled to high tolerances using quality materials throughout, including 316L bellows, which offer a guaranteed minimum lifetime of 10,000 cycles.

LBDs utilize a common drive body actuated by four interchangable mechanisms; micrometer style actuation and stepper motorization.

The driving mechanism, which incorporates a precision cut lead-screw that is supported internally via a ceramic linear bush for greater rigidity, can either be manually actuated via a micrometer scale or stepper motor driven, both of which offer a factor twice the resolution of conventional units. Actuation via a simple pull rod and is also available.

As actuation mechanisms are interchangeable a user-friendly retrospective motor upgrade is possible at any time (see below). This upgrade includes pre-wired home and limit switches for positional accuracy that can easily be removed for bake-out.

Dimensional Drawings


Product data Linear Bellows Drive
System mounting flange - Standard CF16 (1.33" OD CF) with clear holes
System mounting flange - Option CF35 (2.75" OD CF) with clear holes
Resolution - Manual 10 microns
Resolution - Motorized 1 micron
Maximum cantilevered load 0.5 Nm
Maximum axial load 25 N (5.6 lbf)
Lateral float of shaft in retracted position 0.3mm max
Bakeout 250°C

Motorization Upgrade

The manual LBDs have been designed to allow a simple three step motorization upgrade.

Step One - Remove brake and thimble screw

Step Two - Install two piece motorization kit (with pre-wired home and limit switches)

Step Three - The motorized LBD is now ready to use

Product Datasheet
For a downloadable datasheet on this product, please click here.
Manipulation and Motion FAQ
Click here for answers to some of the most common questions we are asked.
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