Our online catalog is being updated! Please contact us for current pricing. Standard Rotary Feedthroughs FRM Series Standard Rotary Feedthroughs, FRM Series Description Thermionics Northwest manufactures a full line of metal sealed rotary motion feedthroughs. These feedthroughs are designed and manufactured to the highest standard of quality and care in the industry. Our design is conservative, utilizing the same principles as those of our precision feedthrough line. We use welded bellows and all ball bearing construction. Custom probe lengths and probe extensions are available. FRM-133-25 Base Schematics Standard Rotary Feedthrough 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-133-25 Standard Rotary Feedthrough 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 FRM-275-38 Ordering Information Rotary Motion Feedthroughs Flange O.D. Probe Diameter Model No. Base Price Motorization Options* /MS /MY /SCC** /MS/W /MY/W 1.33 0.25 FRM-133-25 $670 $505 $505 $1,005 $1,040 $1,040 2.75 0.25 FRM-133(275)-25 $670 $505 $505 $1,005 $1,040 $1,040 2.75 0.38 FRM-275-38 $980 $555 $555 $1,105 $1,045 $1,045 Custom length probe add $60 for 0.25 probe or $80 for 0.38 probe *Add motorization option price to base price. **Price includes controller. Other motorization options do not include motor controller. Options Option: Custom Length Shaft Model Number: /CL Price: add $60 / $80 Option: Mechanical Counter Model Number: /MC Price: add $345 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 FRM-133-25/MC (shown with optional /MC mechanical counter) Motorization Options /MS Stepper Motor Drive Model Number: /MS Price: add $505-$555 FRM-133-25/MS (shown with optional /MS 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 /MY Synchronous Motor Drive Model Number: /MY Price: add $505-$555 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 /MS/W Stepping or /MY/W Synchronous Motor Drive with High Precision Worm Drive Model Numbers: /MS/W or /MY/W Price: add $1,040-$1,045 Anti-backlash worm gear drive Self-locking Manual knob Motor controller sold separately SMC Stepping or YMC Synchronous Motor Controllers Click for more information on the SMC Stepping or YMC Synchronous Motor Controllers /SCC Speed Control Motor Drive Model Number: /SCC Price: add $1,005-$1,105 FRM-133-25/SCC (shown with optional /SCC 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