Standard Rotary Feedthroughs

Thermionics FRM series rotary feedthrough is metal-sealed and are all metal, using welded bellows and stainless steel bearings.  All manual units are bakeable to 200°C fully assembled.  Higher bakeouts may be used with partial disassembly.  These feedthroughs are also available with a number of custom options.

Frm25pic

FRM-133-25

  • 1/4″ O.D. probe
  • 1.33″ or 2.75″ O.D. mounting flange
  • 360° rotation
  • Manual or motorized operation
  • Bellows sealed
  • Maximum bakeout temperature: 200°C
  • Torque limit: 150 oz-in
  • 2° graduations, 0° to 360°
  • Uses 7 ball bearings
  • Position lock

FRM133

FRM-275-38

  • 3/8″ O.D. probe
  • 2.75″ O.D. mounting flange
  • 360° rotation
  • Manual or motorized operation
  • Bellows sealed
  • Maximum bakeout temperature: 200°C
  • Torque limit: 1,100 oz-in
  • 2° graduations, 0° to 360°
  • Uses 8 ball bearings
  • Position lock

FRM38

Stepper Motor Drive

Applications: precise positioning, positioning multiple axes at one time, computer-controlled actuation

  • Direct drive
  • 200 steps per revolution
  • 50 oz-in holding torque (higher torque motors available)
  • Maximum speed 300 rpm
  • Low inertia design
  • Manual knob
  • Motor controller sold separately
  • FRM-133-25/MS Pictured

FRM13325MS

Synchronous Motor Drive

Applications: coarse positioning, continuous rotation

  • Single speed, 72 rpm
  • 2 directions
  • 50 oz-in holding torque (higher torque motors available)
  • Low inertia design
  • Manual knob
  • Motor controller sold separately

Synchronous Motor Drive with High Precision Worm Drive

  • Optional for Stepper and Synchronous motors
  • Anti-backlash worm gear drive
  • Self-locking
  • Manual knob
  • Motor controller sold separately

Motor Controller options available for Stepper and Synchronous motor applications

Speed Control Motor Drive

Applications: continuous rotation with variable speed

  • Variable speed
  • Switchable direction
  • 5-95 RPM with 50 oz-in torque
  • Options:
    Higher torque motors
    Different speed ranges
  • Includes Controller

FRM25SC

Mechanical Counter

  • 5 digit Veeder Root mechanical counter, metal case
  • 3.6:1 spur gear drive
  • Adjustable counter orientation
  • 36 counts per feedthrough rotation
  • Removable for bakeout
  • Retrofit kit allows mounting without breaking vacuum

FRM25MCO

Call or email with your requirements and for current pricing.

800.962.2310 / sales@thermionics.com