I have a 1022w bench grinder with a missing capacitor. The baldor catalog doesn't list the part number or spec for the cap. Nor is there a wiring diagram that shows the connections to the cap. Anyone know the part number (or better) the spec for the cap? I don't mind buying from Baldor but would prefer to buy the cap locally. since the cap was removed before I got the grinder, a link to a hookup guide or wiring schematic would be great too. Thanks,

Much would depend on whether it is a start capacitor or a start/run capacitor.
If there is a switch on the end of the rotor operated by centrifugal weights it will be a start capacitor only but if there is no centrifugal switch the capacitor will need to do double-duty and the value could be critical.

Contacting a dealer or the manufacturer would be favourite but a motor specialist might be able to make a recommendation. Guessing isn't really an option and the working voltage of the capacitor is equally important. Most generic capacitors are rated in dc volts and for them to be safe used on ac mains the working voltage must be considerably higher than the rms value of the ac mains. It is best to use only capacitors rated for ac mains.

You will probably find the capacitor as a spare part from a dealer will be prohibitively expensive but once the value has been discovered and if possible the manufacturer, part number and so forth, great savings can be made by sourcing direct from the capacitor manufacturer.

I recently paid less than £5 plus carriage plus VAT for a capacitor the machine manufacturer wanted more then £60 for.
Good luck!

Hi and welcome to FixYa, I am Kelly
Inside your grinder either the stationary switch or the rotating assembly that actuates the stationary switch has failed.

Download this pdf file:
http://www.baldor.com/pdf/literature/CA506_0806_WEB.pdf Then go to page 9

The rotating assembly is this part number: (most common failure)
34RS2060SP

You must remove the end plate / cap to change this part.

The statonary switch rarely fails unless the rotating assembly damaged the contacts when the rotating assemble failed. When the rotating assembly fails you often find a spring and flyweight loose inside the grinder during disassembly. Should your stationary switch have failed try and get a number off of it so you can get the right switch. Otherwise you have to use NEMA code / Body type numbers.

Thanks for choosing FixYa,
Kelly

this is a "Split-Phase"motor it uses only a run capacitor and a typical capacitance rated MFD rating will be between 80 and 290 MFD, go to www. grainger..com and they will have your part,and even if its an older unit and the model/serial/number is available take it with you & they will have a replacement capacitor available in the correct size/dimension/mfd/etc

You could connect the wires of the switch together inside and bypass the switch. Then I would connect in the power cable a switch rated for 1 hp. You can use surface mount electrical box, with two cable connectors (one for the cable going into the grinder, the other for the cable going to the male cord end of the cable. Install a 120 volt switch inside the box (similar to the light switch in the wall). Make sure that the switch is rated for 1 hp. I would install the switch under the bench, under the grinder.

Joe

remove the cap cover on the motor and its on the side of the cap i.e. mfd/v.a.c.

near as I can figure they should be a 10-32 x 3/8 serated bolt. the website doesn't define the parts that well

Some grinders have tapered, threaded shafts that allow the use of soft buffing or metal polishing wheels, could that also apply to yours?

if this is a cap start motor and not a centrifugal start run motor then bad cap is good place to start