Gringer wheel and brush mount?

[Radio Ron w4ron]

I have a real POS chinese bench grinder, turns real fast but has no
*** at all, as soon as you touch something to the grinder it'll almost
stop.
I found an old Craftsman electric motor that was my dads, it's got to me more than 50 years old, I remember it being around at least that long.
I found it on a back shelf in my shop earlier this week. It's a beast.
When I switched it on it almost jumped off the bench. I believe it'd
about pull the house off the foundation...
I'd like to use it for my grinder/wire brush, the only problem is the
POS grinder has threaded shafts so a pair of nuts will long to grinder
wheel to the shaft.
The old Craftsman motor has 5/8" shafts with key ways.
Any suggestions as to how to mount the grinding wheels to the keted
motor shafts?




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[G_P]

Various places sell arbor adapters online to convert motors into buffers/grinders. Google should find them easily.

Please put guards on it! An exploding grinding wheel can do some serious injury and damage.

You're looking for the one on the far right.



Sent via carrier pigeon

 

[Outlawmws]

I've used those arbors before, and I'd be real cautious about having a heavy wheel on them; I generally reserve those for wire wheels, or buffing wheels (Low mass).

If you DO decide to go with those, install it, mark where the set screws land and the dismount it and grind a flat that is beveled towards the motor case slightly.
then make sure to get them tight, and locktite them in...

Again I DO NOT recommend these for heavy wheels, the are known to "walk off" the shaft...

 

[Radio Ron w4ron]

Thanks a BUNCH, I found exactly what I need on ebay.
What a great resource this forum is.

 

[zkling]

What Outlaw said above. If you actually plan to use this thing, either get a replacement bench grinder, should be able to find a nice on via craigslist <$50. Or since you already have the motor, get an old belt driven grinder and power it with the motor you have. It will be much more useable and in the long run I think you will get more enjoyment out of using it. If you put a wheel right on the end of the motor shaft, you are going to drastically reduce the motor life. It will fill with grit and other ****. Just my 2¢

Edit: Looks like there are quite a few good little bench grinder for <$40 on your local CL. I think you will be much further ahead with a purpose built machine in this case.