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Caburn-MDC rack and pinion linear motion feedthroughs are very similar to push-pull devices, but provide finer control of linear motion. The rack and pinion drive mechanism is still considered quick-action when compared to rotating actuator, linear motion devices. They too are operated by observing the motion process through a vacuum viewport. For quick and easy positioning reference the feedthrough body has been laser etched with linear travel graduation marks in increments of 0.6mm. A I~ turn on the handle generates 25mm of linear travel. An attractive black anodized finish provides high contrast and visibility of the laser etched graduated scale. The actuator can be locked in position by simply tightening the position lock located at the top end of the actuator body.

Rack and pinion linear motion feedthroughs are constructed of high grade vacuum compatible materials. Welded stainless steel bellows and the use of linear bearing shaft supports provide reliability and smooth operation.

  • 50 to 152mm linear travel
  • Manual actuator
  • Linear position lock
  • UHV or HV-compatible materials
  • Welded bellows seal
  • Bakeable to 100°C'
  • CF and ISO KF port mounts

Rack and pinion CF

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Flange/actuator body 304ss/ Anodized aluminium
Shaft seal AM 350 welded bellows
Vacuum range UHV/HV 1.3x1O-11mbar or 1.3x10-8mbar
Temperature range' UHV/HV -20°C to 100°C
Axial load 4.5 kg
Lateral load 2.3 kg @ 50.8 extension maximum
Weight and dimensions See table

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