very unusual for a switch to not work unless its been dropped and broke, make sure that the fuse is not blown in the plug ,more than likely you wont get a switch new unless you contact the manufacture
red october, November 2014
Solent Tools supply Performance Power spares - they may have the switch you need.
Are you certain that the switch is defective?
Sooty, November 2014
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I can answer this question...
Performance Power Tools Grinder PP150BG needs new on/off Switch?