I need a wiring diagram for a Craftsman 6" bench grinder with light. Craftsman #152.211521. Any help would be appreciated

I need a 4CR-20-756 Klixon relay for a bench grinder.

Unless the motor is a brush type universal unit, there is commonly no way to change the speed of an induction motor. There are AC motor speed control units available, but cost more than the grinder as they change the frequency as well as the voltage. There are speed controllable grinders available that use brushes so that simple electronics can control speed. Hope this helps!

An ajustable wrench for the 'wire brush end' nut,and a visegrip type plier for the opposing wheel end. Wrap the jaws of the visegrip pliers with tape to protect the spindle opposite the wir wheel. Loosen the nut on the wire wheel end,counterclockwise.REMEMBER: lefty loosey-righty tighty.

I had the same problem, I went to a pawn shop, some times they have part for some of the items they buy . I wish you luck in finding one. it took me some time. hope you find one

Hi,

Here it is...

http://www.owwm.com/pubs/222/1477.pdf

http://www.hammerwall.com/Manuals/Craftsman/Description/397.19580/Craftsman%2013%20HP%20Grinder%20Manual%201966/1477/

heatman101

What do you need a manual for? It's a grinder, grind something!!

Mike
Not sure what was happening when the previous reply was created, but the owners manual is part number 211260001 $7.99 at SearsPartsDirect.com

That said, I'm staring at my own copy of the the owners manual and I can't really see why you would want to pay for one. The only really useful information is the parts diagram which is online at SearsPartsDirect.com. The rest is generic grinder information (support workpiece, select proper wheel, etc.) and CYA (always wear gloves and eye protection, don't remopve safety guards, don't use damaged wheels, don't stick your finger in the light socket, don't cross the steet in the middle of the block, etc.)

I know this is an old post, but maybe it will help others looking for information.

I have the Craftsman 1/3-HP grinder models: 397.19580 & 397.19581.

They are Split-Phase single voltage (115 V), and use a Klixon start-up current style relay - 2CR14-224.

The relay is normally open. When the large starting current in the main/run winding circuit is sensed by the the relay coil (term 3 & 4) which is in series with the main winding, the relay contacts close (term 2 & 4).

The one end of the start-up winding is connected to the main coil's BLK wire in the coil pack.

When the relay contacts close the start-up winding is energized. The start-up coil is used to provide a boost to over-come the resting inertia of the rotor.

Once the rotor reaches between 65% - 75% of operating speed, the current through the main winding circuit is reduced to the point that the relay coil cannot over come the return-springs force, acting on the relay contact arm. With the contacts open, the start-up winding is no longer energized.

This should take about 2-3 seconds, if the relay malfunctions, the high current through the start-up windings (thin wires) may be damaged.

Here is a diagram I have made.


Klixon 2CR relays are no longer available.

You may find a suitable replacement here:
http://www.herbach.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=HAR&Product_

Replacement should be simple. Just do a one for one hookup with the new part, after you unplug it first.
For a diagram go to;

http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=397.1949&productCategoryId=0721000&brandId=0247&modelName=CRAFTSMAN-1%2F2-H.P.-GRINDER&diagramPageId=00001&documentId=00023041&pop=flush