Got an old stone grinding wheel - see (large) pictures

scotchleaf

scotchleaf

Joined
Oct 23, 2006
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Mine doesn't have a frame, and appears to have been modified to take a leather belt. I'll try to take photos if anyone is interested. Since the nut is frozen with rust I may try to use the method shown below for bearings. Someone even found the patent info for the hub.
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The arbor has double ends because it can be used as a stand-up grinder with one foot, or a sit down grinder with both feet on treadles.

I have a "bicycle" style grinder ( sit down) on my porch as a decoration along with other old forges and stuff.

If you power it, it must be with a small motor and the pulleys geared for 100RPM. For a 1/4HP 1750RPM motor, that would be a 1.5" pulley on the motor and a 24" pulley for the wheel. Obviously, it would be best done with a jack shaft and two sets of pulleys 1.5-12"/1.5-12". DO NOT POWER IT FASTER THAN 100 RPM.
 
Nice, thats much older than the one I have (that I tried to sell to Rick but his wife wouldnt let him). Mine is powered by an old 1/4 hp motor and has 6 step pullys. I havent started it because its off center a bit and i havent had time to fix it.
 
Thanks for posting this; did not think about the wheel blowing up!!! I have a large stone wheel and have been trying to slow it down, throws water at me. Will follow this tread.
 
Torque and HP are not advantages on these wheels. Slow and steady is what is needed. A 1/4HP motor geared to drop the wheel to 100 RPM will have all the torque needed. You should be able to stall the wheel with a leather gloved hand.
 
Wheels exploding have killed a lot of folk over the years. As Sam said, many of us are too used to modern engineered abrasives to realize quite how dangerous these things can be.

I have a fairly old (probably 1950s) 24" natural wheel on a factory motor and drive. It uses a 1 HP motor with an integral reduction gearbox, in turn driving a speed-reducing vee-belt drive. Wheel speed is 42 RPM and the surface speed works out at 264 ft/min; so close to 3 MPH that 3 MPH "has" to have been the design speed.

At that speed, it doesn't throw water off the surface, but the water off the surface does run up the workpiece as soon as it touches the stone and wets you anyway. Don't think you're gonna win.
 
Update: I got the hub off, and whoever modified my wheel put the hole WAY off center (like about an inch). So would you try to grind it into a smaller, but truer wheel, or just scrap it?
 
The last 20 or so years of my dads life he was a part time antique dealer, and he drug me to about 5000 auctions, mainly so I could carry stuff to the tuck I think ;0) and I don't think I ever seen one of those stone wheels that wasn't off center

If it were me I would try to re-balance the wheel using one of those stones for truing bench grinder wheels
 
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