Help with ID motor

[ekegelmann]

Hello, thanks in advance. Wondering how old this motor is. I cannot see the model #.

Was this specifically for the bench grinder or was this attached after? Any value? Picked it up in a barn sale. Wondering if I should repurpose it or if someone needs it for a project.

 

[PCustoms]

Old. Pre 50's, but that's purely a guess

Not originally designed for that grinding wheel

 

[ekegelmann]

Old. Pre 50's, but that's purely a guess

Not originally designed for that grinding wheel

Would you take the grinding wheel off then to clean it up etc

 

[walta]

Would you take the grinding wheel off then to clean it up etc

Please be sure to understand how risky that grinder / death machine is.

That unguarded stone has been bumping around basements shops and garages for the last 70 years or so. At some point someone bumped something heavy into the side of the stone and since stones can’t bend, they crack. The crack may be tiny and imperceptible. At some point when the grinder is running you grind away the uncracked part of the stone that held it together. In an instant the wheel splits into 3 parts and one hits you in the forehead. The only question is where you dead before you knew what happened?

Yes remove the wheel today

Walta

 

[PCustoms]

Would you take the grinding wheel off then to clean it up etc

I'd have no use for something like this.

I'd probably throw it in the scrap pile

 

[drmarkr]

Agree. I would chuck it in the trash. I wouldn't even turn that thing on to test it to see if it runs...

 

[BrandonV]

Please be sure to understand how risky that grinder / death machine is.

That unguarded stone has been bumping around basements shops and garages for the last 70 years or so. At some point someone bumped something heavy into the side of the stone and since stones can’t bend, they crack. The crack may be tiny and imperceptible. At some point when the grinder is running you grind away the uncracked part of the stone that held it together. In an instant the wheel splits into 3 parts and one hits you in the forehead. The only question is where you dead before you knew what happened?

Yes remove the wheel today

Walta

What is the general consensus on when to replace a grinding stone?

 

[Bill T]

I was taught to always "ring" a grinding stone before mounting to bench grinder. If the bench grinder (or hand held) is used/pre-owned, I would put a new stone on it if there is any question on it's condition.
To sound a wheel, place a dowel, screwdriver handle, even a piece of cord through the center hole. Tap the wheel with a non-metallic object (like a screw driver handle). You should hear a clear ringing sound. If you hear a dull thud, replace the wheel. You should sound the wheel, rotate the wheel 1/4 turn repeat sounding, rotate 1/4 turn repeat. Check all four quadrents of the wheel.
For optimum results, a grinding wheel should be trued occasionally. There are many You-Tube clips on how to do this.

 

[Stuart in MN]

I'm sure the motor was not sold new with the grinding wheel, the two were put together at some later time. The adapter arbor was a common accessory, so people could take an old motor they already had sitting around and use it for grinding or sharpening things (I have a similar motor/grinding wheel setup in my workshop.)

I agree the wheel itself is probably suspect and should be replaced, but if the motor still works okay it can still be used.

 

[mike93lx]

If you have a use for a 1/2hp 3500rpm motor, keep it, but if not, I'd send it to the scrap yard if it was in my shop.

 

[micromind]

What is the general consensus on when to replace a grinding stone?

Right before it explodes.........lol.

Seriously, I've used the ring method described above. I don't know it if actually works or not, I've never had a wheel come apart but I have rejected a few of them because they did not pass the ring test.

 

[BrandonV]

Right before it explodes.........lol.

Seriously, I've used the ring method described above. I don't know it if actually works or not, I've never had a wheel come apart but I have rejected a few of them because they did not pass the ring test.

Eh... think I'll just toss em after a few years after reading more and more.

Cheap insurance.

 

[walta]

Eh... think I'll just toss em after a few years after reading more and more.

Cheap insurance.

The big issue is that the wheel is unguarded. That leaves the wheel vulnerability to damage. The guards are designed to contain the fragments should a wheel explode.

The was I see it wheels of unknown origin are not worth the risk at any price. I see no reason to discard a wheel installed on a grinder until it is to small to be useful.

Walta

 

[The Cobbler]

previous neighbours, the husband was killed by a shattering grinding wheel at work . they were a nice young couple with 3 kids. He was the then current Mayors Son.
No one is immune

 

[Doozer75]

Maybe everyone should just stay inside and order things off Amazon.
The world is entirely too dangerous to actually participate in.


-Doozer

 

[Bill T]

Doozer75--entirely inappropriate response to a post about someone's friend (with a family) being fatally injured in an accident.

 

[FrankLee]

Delco.

My swag is that the serial number, "H 1 3", is the date code; August, 1941.

It looks like a sleeve bearing motor. If there's any radial play in the rotor, then I think I'd scrap it, else it could clean up ok.

 

[walta]

Maybe everyone should just stay inside and order things off Amazon.
The world is entirely too dangerous to actually participate in.


-Doozer

My point is not that no one should use a dangerous tool.

The point is one should be made aware of the risk one is taking and make an informed decision for themselves.

Walta