Rotary Limit Switches

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Geared Rotary Limit Switches from Industrial Power & Control are worm gear reduction switches that provide control to rotating drive equipment. After a specified number of revolutions (field settable), a rotary cam makes mechanical contact with the switch actuator and the electrical contacts change state. Ratios from 1:1 to 1:9400 are available to meet your specific needs. Units come standard with up to 12 contacts. 

Transmission and gear driving shafts are made of stainless steel to prevent oxidation and wear. The gear wheels and the driving bushings are made of a self-lubricating thermoplastic material, chosen to reduce wear and maintain accuracy. Sintered bronze bushings are molded into the base of the limit switch to optimize the shaft rotation and prevent wear with the plastic base material.