Rotary Actuated Linear Feedthroughs
Thermionics’ FLMR is a metal-sealed linear motion feedthrough that is all metal, using welded bellows and stainless steel linear 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.

FLMR-133-25 Series
- 1/4″ O.D. probe
- 1.33″ O.D. mounting flange (2.75″O.D. flange optional)
- Up to 6″ stroke
- Rotary actuated, 20 turns/inch
- Stepper motor actuation optional
- Stainless steel bellows sealed
- All ball-bearing drive
- Stainless steel linear shaft bearing
- Includes position indicator
- Maximum bakeout temperature: 200°C

FLMR-275-50 Series
- 1/2″ O.D. support shaft
- 2.75″ O.D. mounting flange
- Up to 6″ stroke
- Rotary actuated, 20 turns/inch
- Stepper motor actuation optional
- Stainless steel bellows sealed
- All ball-bearing drive
- Includes position indicator
- Maximum bakeout temperature: 200°C
