The M156/158 timer is available in single-cam and double-cam configurations, with a wide range of cycle times.  

M156/158
   
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M156/158
A wide range of cycle times (from 6 seconds to 288 minutes) and standard cams make the M156 timer ideal for many continuous cycle applications. A single cam and switch is standard (M156). A two-cam configuration (M158) is available if additional switching capability is needed. Available switch configurations are single-pole single-throw (SPST) or single-pole double-throw (SPDT) utilizing 15 amp "snap-action" switches.

(Note: Numbers in parentheses are millimeters.)

Specifications
Switches: 15 amp, 1/2 HP, 125/250 VAC
Termination: .187" (4.75) or .250" (6.35) male spade terminals
Time ranges: Cycle times ranging from 6 seconds to 288 minutes are 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.
Shaft rotation: Clockwise
Shaft extension: Not applicable
Mounting: Two #6-32 tapped through-holes in stud mounted parallel to the shaft
Agency listings: UL recognized and CSA certified
Applications: Heat pumps, food processing equipment