Craftsman 6" Bench Grinder with Lamp "older switch" Questions

my grinder lacks power and stops as soon as i put just a little resistance to the wheels...whats wrong with it? when i turn on switch it just humms. 1/2 hp older model

i have a sears craftsman bench grinder 1/2 hp 5.1 amp. when iturn on switch it just hums. whats wrong with it? it is an older model hceck the belt driver ,it mite be broken

older sears bench grinder wont run 1/3 hp model 397 19581 this grinder hums and will not turn when plugged in unless you give it a spin. i dont have a wiring diagram and the wiring had been ...

older sears bench grinder wont run 1/3 hp model 397 19581 this grinder hums and will not turn when plugged in unless you give it a spin. i dont have a wiring diagram and the wiring had been ...