Bellows-sealed devices

LBD series

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.

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 utilise a common drive body actuated by four interchangable mechanisms; pull rod, micrometer style actuation, pneumatic actuation and stepper motorisation.

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.

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Key features

  • 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
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Available Downloads  
LBD Technical Datasheet Download

Simple retrospective actuation upgrade

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.

Step 1: Thimble and brake screw removed   |   Step 2: Install simple two-piece motorisation kit   |   Step 3:  Motorised LBD is ready to use.


Note: a simple upgrade kit is also available for pneumatic actuation. Contact us for more details.

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Specifications

LINEAR BELLOWS DRIVE
Mounting flange CF16 (1.33" OD CF)
Calibrated drive resolution 10 microns
Motorised drive resolution 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

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