CS 601

Sub-Miniature Adjustable Cam Switches

  • Switch dwell angles continuously adjustable from 3º to 357º
  • Operating sector infinitely adjustable to any shaft position.
  • External screwdriver adjustment of switching angles.
  • Can be set while shaft is stationary or rotating.
  • Switch settings independent of other switches in stack.
  • Only ¾” diameter; equivalent to BuOrd Size 8.

Model CS 601 Adjustable Cam Switch utilizes PMC’s patented* cam switch design in a sub-miniature assembly developed specifically for airborne, space vehicle and other applications where size and weight are critical. It incorporates in a single BuOrd Size 8 end-mounted unit all the functions of a conventional plate cam, cam follower and snap-action switch, eliminating the need for separately-mounted cam mechanisms and switches and their associated hardware.

Switch “on” and “off” points can be quickly set by means of external screws while the shaft is either stationary or in motion. Dwell angles as small as 3º or as great as 357º can be set for either closed or open circuits, depending upon choice of switch terminals. External locking screws maintain switch settings under all conditions of shock and vibration encountered in military and/or commercial equipment.

Model CS 601 Adjustable Cam Switches incorporate standard type SPDT sub-miniature snap switches and are available as single switch units or in ganged assemblies with as many as eight independently-adjustable switches. Both single- and multi-switch types can be supplied with optional shaft extensions or double-ended shafts. All models meet the applicable requirements of Ml L-E-5400.
* Pat. No. 3,060,286

Part No.No. Of SwitchesDim. “L” (In., Max.)Inertia (OZ. IN. SEC.2)WT. (OZ.)


Electrical Ratings:

115/230 vac 7 amp, inductive and resistive 28 vdc
resistive, sea level 7.0 amp
resistive, 50,000 ft . . .7.0 amp
inductive, sea level 4.0 amp
inductive, 50,000 ft 2.5 amp
Max. Inrush 24 amp

Mechanical Data:

Shaft rotates on precision ball bearings
Shaft End Play 003 in., max.
Shaft Pilot Runout 001 in., max., T.I.R.
Temperature Range -65°F to +250° F
Make-Break Differential 1.5º max.
Operating Torque 1.2 oz.-in. max. per switch (see note)

NOTE: peak torque occurs at switch actuation. With all switches in a multi-switch unit set to identical on-off positions, the total maximum torque will not exceed n x 1.2 oz-in., (where n is the number of switches in the stack). With different switch settings the total maximum torque may be as low as 0.3 x n x 1 .2 oz-in., depending upon the specific on-off settings and number of switches.

Precision Mechanisms Corporations will be pleased to quote on variations for the CS 402 Cam Switch for special requirements. Readily available variations include:
• non-standard shaft extension
• double-ended shaft extension
• ultra low differential switches
• multi-switch units mounted in gear train mechanisms for specific switching functions, with or without motor drive