I have a buffalo b-6cb grinder that won't start unless I manually give it a spin. I took the bottom off and found the switch but No capacitor.

SOURCE: NEED ON/OFF SWITCH FOR BUFFALO BENCH GRINDER

You can get a replacement toggle switch at any hardware store look in the electrical department.

SOURCE: need an on/off switch for a buffalo bench grinder

I had the same problem with a Northern Tools bench grinder. These are made in China and parts are hard to come by. I had enough room after removing the old broken on/off switch to install a single pole 15 amp light switch like you use in your home. I simply installed it horizontally and then put the switch cover on. It works perfectly. If you do not have enough room then look for any 15 amp or larger switch that will fit in the housing. Any on/off switch will work. You could even mount the switch on the bench in a switch housing and run the wires from the grinder to the switch and back if need be. Just be safe and make sure there are no exposed wires. As a last resort you could remove the switch connect the wires, eliminating the switch and use a plug in wall switch such as this.

SOURCE: I have an B-6CB(KS) 6" buffalo grinder, the switch

The neutral line should never be switched--only the hot wire (black). If there are only two wires that went to the switch, you should be able to tie them together and the motor will run when plugged in. The switch should be a common SPST type either toggle or rocker to fit. Hope this helps!

SOURCE: i need an on/switch for

Find a Single Pole Single Throw (spst) toggle switch at the local hardware store rated for the load of the grinder. Wire the switch in place and viola you are done! Machines are stupid;they can tell the difference between an oem part and a replacement.