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The Makita Switch 110v with OEM no. 650770-7 is a genuine Makita on/off trigger switch for several 110v angle grinders.
GA4030R GA4530R GA5030R M9503R 9558HNR 9557HNR 9558NBR M9502R
Over time these switches can become loose and wear down until there is no contact leaving your angle grinder non responsive and grinding your production down to a halt. This replacement switch works in tandem with the switch lever assembly, When this switch is pressed along with lever the grinder will whizz into action, but once the safety on / off switch is depressed the grinding will grind to a dead stop.
For compatible models please see below :