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Wiring Diagram I have a bench grinder model LE-137, HP 1/4, Wheel 6", RPM 3450, 120v 60 HZ. but need the wiring diagram and value of the capacitor. It was stolen by somebody. MFR. Name; TZU Liang Industrial CO., LTD. Thanks for your help My email is myfamis@hotmail.com

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SOURCE: Bench Grinders Usage

Grinding is the fastest way to deburr a sharp corner or dress the end of threaded rod or bar stock that's been cut to length. Fit a grinder with a wire wheel, and you have a handy tool for removing rust. Then switch to a buffing wheel and you're ready to polish metal to a mirrorlike sheen. But for most of us, grinders are essential for shaping and sharpening hardened tool steel and high-speed steel.

Posted on Aug 27, 2008

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SOURCE: Bench Grinders Safety issues

Goggles or safety glasses need to be worn to protect the operator's eyes from the sparks and metal filings that result. Depending on the workpiece and time of exposure, hearing protection may also be required, the dust produced is also potentially hazardous. The toolrest (or workrest) should be mounted slightly below the center of the grinding wheel with less than 3 mm clearance from the wheel. This prevents the work from jamming between the toolrest and the wheel. Grinding wheels designed for steel should not be used for grinding softer metals, like aluminium. The soft metal gets lodged in the pores of the wheel and expand with the heat of grinding. This can dislodge pieces of the grinding wheel. Wire brushes require particular attention for the safety of the operator and bystanders as the metal wires may become dangerous projectiles as they could bind with the object being brushed and so throw it away with great energy. The machine needs to be securely mounted to a pillar or a bench to be used safely and effectively, often with an emergency stop switch or pedal fitted close by the machine, for use in emergencies.

Posted on Aug 27, 2008

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SOURCE: grinder won't stay running

what is the mf(microfarad) rating and the voltage,then go to an industrial electical shopand buy one for the correct voltage and an (mf) equal or greater ,but not by more than 10%---mine cost $9.00-in Maine---good luck- MATT

Posted on Jan 04, 2009

rowdy45176
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SOURCE: older black & decker bench grinder

Usually a new wire wheel comes with different size bushing just for the problem you are describing. Either that or take it back and get one specifically for your tool.

Posted on Feb 01, 2009

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SOURCE: switch and capacitor crapped out on 1/2 hp Sears bench grinder

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

Posted on Mar 28, 2009

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1 Answer

Could sure use a wiring diagram for a Dayton 5k961c motor.


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1 Answer

What type and size capacitor goes on a Baldor 1/3 HP bench grinder


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!

Nov 04, 2015 | Baldor Grinders

2 Answers

Need wiring diagram for control circut


I am sorry but we have no wiring diagrams here at fixya due to copyright laws.

Jul 27, 2012 | Cars & Trucks

1 Answer

I have a 1/3 hp motor with a capacitor. There are four motor leads coming out of motor, the capacitor is mounted in the wiring box. This motor does not have a centrifugal switch, to isolate the capacitor...


I am in the process of replacing a capacitor on a Craftsman 6 in 1/3 grinder, 2.8 amp, single phase, 110v. Not sure on the centrifugal switch. model 319.190621, ser B9530. When I took the old one out the black wire from the capacitor went to the cluster of back wires (in my case 3) in the wire nut. The blue wire from the grinder went to red wire from the capacitor in a wire nut. Hope that helps you....

Maybe you can help me... the specs on the capacitor burned off when it failed. Can you tell me what the capacitor specs are on yours?

Nov 16, 2010 | Craftsman 6" Bench Grinder with Lamp

1 Answer

Bench grinder, 110/220?? wired up properly according to diagram on grinder, just turns on as soon as it's plugged in but it just humms, it does not spin the grinding wheel.it is a monster w/ a 3/4 hp...


LIKELY the capacitor which is usually in the base is bad.

The capacitor shifts the phase angle in one of the two windings which creates a pseudo rotating field to start rotation.

Nov 07, 2009 | Saws

2 Answers

Older sears bench grinder wont run 1/3 hp model 397 19581


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.
older-sears-bench-grinder-wont-run-1-3-z1zi3msqm0xxzvze3v341n5r-4-0.jpg

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_

May 31, 2009 | Craftsman 6" Bench Grinder with Lamp

1 Answer

Is it possible to take a Whirlpool 3363736 and make a grinder?


I see bench grinders for about ten or twenty dollars at the flea markets all the time. They also have the $$ grinding wheels on them.

May 16, 2009 | Washing Machines

1 Answer

Older sears bench grinder wont run 1/3 hp model 397 19581


Hi again, OK, Well since I don't have a wiring diagram and the colors don't help. I am also going to assume it is 110VAC. The larger wires are probably the run or primary, it you remember which ones were connected it will help with polarizing. ( getting it to run in the right direction as well as the start and primary working together). You can use the two terminal switch but you should use a three wire cord. Use the switch to break the neutral and ground the case. The connections should be as follows: Connection 1, would have one of the primaries and one of the starts to neutral. Connection 2, the other start to the relay. Connection 3, the coil side of the relay to the remaining primary. ( if the relay has two connections on one end and one on the other it would be the single) Connection 4, the 3rd position on the relay to hot. That is how a split phase is wired. You may find a simple wiring diagram on the net if you type split phase motor wiring diagram. Good Luck to you, this should Fixya!

Mar 04, 2009 | Grinders

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