Rotating Cam Limit Switch

Rotating Cam Limit Switch

Gemco 1980 Series Rotating Cam Limit Switches precisely control the limits of rotary motion expressed in shaft rotation, either through a roller chain, gear train, or directly. The device was developed to use for heavy duty material handling mechanisms, mechanical presses, packaging machines, rotary table, and many applications where accurate, repetitive, sequential operations are required in control circuitry.

The Gemco Rotating Cam Limit Switch makes it possible to open or close independent circuits at desired angular position of the input shaft. Closed circuits or open circuits from 4 to 356 degrees are possible without the use of special cams. The cam settings can be adjusted at any angular position of the cam shaft. No tools are necessary to adjust cam settings!

The 1980 series is available in NEMA Type 1, NEMA Type 4 & 5, NEMA 7 , NEMA 9, and NEMA12  molded enclosures and can be ordered wotj 2 tp 40 circuits. 


  • Precision Cam adjustment at any angular position of the camshaft.
  • Speeds from 0 to 500 RPM in either direction
  • No special Cams required for any contact setting from 4 to 356 degrees.
  • No tools required to adjust Cam setting.
  • Accurate repeatability.
  • GEMCO rugged duty precision snap action switches.
  • UL recognized switches under file E56660.


  • Straight Drive and Right Angle Gear Reducers
  • Timing Dial and Timing Dial Windows
  • Double Ended Shafts
  • Special Shaft extension and keyway
  • Resolvers, Encoders or Potentiometers driven off the Camshaft
  • Heaters and Thermostats
  • Adjustable Coupling
  • Special Conduit Openings
  • Special Cams and Large 6" Metal  Cams for Higher Resolution
  • Add-A-Cam Feature
  • Stainless Steel--NEMA 4X

Usually ships 10 - 15 working days after receipt of order

Gemco rotating cam limit switches are built to order, and are not returnable. If you have any questions about using this product in your application, please do not hesitate to call or email us.

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Nelson Northwest Alaska • 2115 SW 152nd St. • Seattle, WA 98166 • 800-726-1884
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