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I am looking for a govenor switch for a National Industrial Tools bench grinder. Model BG-64. 6" wheels phase-1 60 cycle motor.

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Posted on Jan 02, 2017

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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

joboo1
  • 257 Answers

SOURCE: 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!

Posted on Mar 04, 2009

  • 718 Answers

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

SOURCE: older sears bench grinder wont run 1/3 hp model 397 19581

Can you get a replacement? If not, we could probably figure out some suitable substitute.

Charlie

Posted on May 31, 2009

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1 Answer

Hi guys just wanting to know if you can tell me how to hook up power cord to bench grinder it is single phased .


the red wire (power--active-- wire) goes to one side of the switch
the other side will be red wire (power --active --wire) to the motor
the black wire is the neutral wire and will join directly to the black wire from the motor
the green/ yellow striped wire (ground /earth wire is screwed directly to the metal body of the grinder
IN some countries there are different color codes for active, neutral wires so get an electrician in to be safe

Jan 09, 2016 | Bench Grinders

1 Answer

Motor hums will not start


A single phase motor needs an additional winding for starting. The winding is often isolated by a centrifugal switch. If the grinder is little used it would not be unusual to find the bob-weights and linkage to be seized.
It would seem time to dismantle the grinder and carry out some maintenance.

Dec 24, 2015 | Grinders

1 Answer

Is the 4A912B Dayton 10" 1 HP bench grinder 3 phase or 1 phase?


If the plug on the cord has 2 flat prongs and one round one then its 110 VAC single phase. If the motor has 4 wires then I'd suspect 3 phase. The data plate on the motor will tell you for sure.

Nov 19, 2014 | Bench Grinders

1 Answer

My ryobie bench grinder keeps tripping the rcd within a second of turning it on?


Assuming your local tech confirms that your bench grinder tests ok. The problem is probably that the grinder draws too much current for the RCD and is therefore detected as an earth leakage. High amperage devices often do that. Your best bet would be to plug it in to a socket which is on a non-rcd circuit. Maybe you have an RCD on the whole house though? I would start with returning the grinder and trying a different brand with a lower amperage/wattage rating. If that doesnt work, I would call an electrician to discuss installing a different RCD or running a separate circuit for your power tools.

Mar 03, 2011 | Jet Industrial Bench Grinder 6in new

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

I have a Cummins 1/2 hrs.bench grinder in pieces. 3 wires from the inside - Black, red, and blue. A capacitor with two male connectors on the end and a switch. How does it need to be wired?


The capacitor goes across the Line, terminals, of the Motor, The Black, should Be Neutral, the RED should be Power IN to the Switch, and the Blue, the "Other" side of the switch. The Capacitor, sometimes goes on the Spare (If any) Terminals of the "Cold" side of the Power Switch.
International color code is Red Positive or Phase, Blue, Phase or Positive, Black, usually Neutral, Negative .
The capacitor is a Suppression" capacitor,and is usually "Across the Motor terminals on "Cold" or "Switched" side of the circuit.
The circuit is simple, Neutral is "Common" the Power comes in to the Switch Contact, whereby the activation of said switch, joins the "Contacts" to the Phase. Positive, Wire to the "Motor". The "Other Terminal Wire from the Motor, goes to Common. The capacitor. Is installed in Parallel with the Phase and Neutral on the "Cold" or normally unpowered side of the circuit.

Mar 13, 2010 | Grinders

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

Grinder won't stay running


The capacitor is easy to change and can be matched once you remove it by any electronics parts house.

Nov 24, 2008 | Delta 23 884 8 Inch Bench Grinder Wheel,...

1 Answer

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.

Aug 27, 2008 | Black & Decker 3/4 Hp, 8" 205MM, Heavy...

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