Standard Rotary (FRM Series)

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.

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

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

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

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

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