Snap Action Disc

The Snap Acting Thermostat Metal Disc is getting increasingly popular as a cost- effective protection of small motors and appliances.

A Disc of Thermostat Metal is pre-tensioned by dishing or doming. With a rise in temperature, the thermal stresses produced due to the Bimetal action reach a point where they equal the pre-tensioning stresses. At this point the Disc snap to the opposite concave. Upon cooling the reverse action takes place but at a lower temperature.

The Upper and Lower Snapping Temperatures depend upon the Disc geometry. Formed and heat treated Discs can be produced on our special purpose machines as per customers requirements