The M175/177 is a dependable, cost-effective repeat cycle timer, available with SPST or SPDT switching.  

M175/177
   
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M175/177
The M175/177 is a dependable yet economical option for repeat cycle timing. Switch closure time within the cycle can be as low as 1% to a maximum of 10% of the cycle time. SPST or SPDT switching is available.

(Note: Numbers in parentheses are millimeters.)

Specifications
Switches: M175: 15 amp 125 VAC, 1/2 HP 125/250 VAC
M177: 15 amp 125 VAC, 3/4 HP 125/250 VAC
M177-2: 20 amp 125 VAC, 3/4 HP 125/250 VAC
Termination: .250" (6.35) x .032" (.81) male spade with foldover construction. Termination designed to accept a standard one-piece terminal plug for quick plug-on wiring.
Time ranges: Common cycle times of 3, 4, 6, 8, and 12 hours, with others available.
Motor: Permanent magnet, ranging from 24 VAC to 230 VAC, 60 Hz (also 50 Hz). Motor leads to any length with terminals to your specifications. Electrically-biased direction system for quick starting and quiet operation.
Shaft rotation: Clockwise. One-way ratchet clutch.
Shaft extension: Semi-flush with tapered surface for one-way manual setting for system checks. Plastic .500" (12.7) knurled knob also available.
Mounting: Two .127" (3.23) diameter through-holes to accept #6 self-tapping, thread-cutting screws, or two .187" (4.75) through-holes.
Agency listings: UL recognized and CSA certified
Applications: Refrigerators, freezers, ice merchandisers