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Precision Rotary (FPRM Series)

Precision Rotary Feedthroughs

Precision rotary feedthroughs are commonly used to define a polar axis for a sample or probe where precision angular orientation is needed.  They provide 360° continuous rotation and are mounted on top of XYZ manipulators and other stages to provide polar axis freedom.   Available with custom probe lengths and field-mountable probe extensions for your specific application.
FPRM cleaned

FPRM Series

  • For sample rotation
  • 1/4″ or 3/8″ O.D. probe
  • 1.33″ or 2.75″ O.D. mounting flange
  • 360° continuous rotation
  • Manual or motorized operation
  • Bellows sealed
  • 0.1° resolution, 1° graduations
  • Torque limits:
    1/4″ probe, 150 oz-in
    3/8″ probe, 1,100 oz-in
  • Maximum bakeout temperature: 200°C
  • Position lock


Motion Specification

  • Angular resolution: <0.1°
  • Shaft run-out: 0.005″
  • Three seconds with optional Newport stage

Readability Specifications

  • Standard scale: 1° graduations
  • With optional vernier: 1 minute


Stepping or Synchronous Motor Drive with High Precision Worm Gear

  • Anti-backlash worm drive
  • Self-locking
  • Manual knob
  • Motor controller sold separately


Fine Adjust Worm Drive Option

  • Adds a precision worm gear to rotary feedthrough
  • Anti-backlash worm drive
  • Manual knob
  • FPRM-275-38 gear ratio 96:1 (standard); 48:1, 24:1 optional gear ratio
  • FPRM-133-25 gear ratio 100:1 (standard); 50:1, 25:1 optional gear ratio