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 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