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WOA Series

Precision Open-Axis Rotary Feedthroughs

The WOA rotary feedthrough is an all metal-sealed rotary feedthrough with the unique feature of a 3/4″ rotary tube with a clear axis diameter of 0.55″.   This open axis feature allows a multi-axis feedthrough to be constructed by stacking multiple linear or rotary feedthroughs onto the WOA feedthrough.  A variety of coaxial rotary and/or linear drives can be produced.


Open Axis Rotary Feedthrough WOA-550

  • 2.75″ O.D. mounting flange
  • 1.33″ O.D. top flange  (2.75″ O.D. optional)
  • 3/4″ O.D. stainless steel tube
  • 0.55″ clear axis up through feedthrough
  • Available without clear axis


Fine Adjust

  • Utilizes a precision Newport stage for rotary actuation
  • Three seconds on Newport stage
  • One minute Vernier reading

Fine Adjust Worm Drive

  • Adds a precision worm gear
  • 96:1 (standard); 48:1, 24:1 optional gear ratio

Stepping or Synchronous Motor Drive with High Precision Worm Gear

  • Anti-backlash worm drive
  • Self-locking
  • Manual knob
  • Motor controller sold separately

Custom Length Tube

  • 3/4″ O.D. stainless steel tube
  • Up to 24″, flange face-to-tip

Shaft Extension

  • Precision 3/4″ O.D. stainless steel tube
  • Split clamp attachment to existing shaft
  • Shaft extension length 3″ to 24″, as per customer requirements
  • With end guide bearing, as required
  • Simple field installation or removal
  • Mounts to 3/4″ O.D. shaft WOA and others