Electric tool speed controlElectric tool speed controlMWK 5460-6 MWK-5460-6 7/9 in. . . . . distributor of OTC, Robinair, Nexiq, S-K Tools and . . Auto-Stop carbon brush, high power to weight ratio, variable speed control . . 9L. . . . A power tool has a variable speed control circuit that comprises a user switch, a motor and a silicon controlled rectifier (SCR) connected in series between a pair of . Online shopping for Speed Control Electric Motors . . Hardware and Tools; Heating and Ventila... more