Question On Craftsman Grinder

Chuck Torman said:
Hey Bob, Check the current price of a quality 1 hp 8" grinder before you retire that old Craftsman, the Chinese import stuff on the market today is mostly junk, I would love to find an old 1 hp 8"Craftsman that I could repair or refurbish. Good luck !!
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I hear you Chuck. I picked this up last week off Craigs list, gave the guy $40.00 and it really is in fairly good condition. One wheel is very good, they had a 6" wire brush on the other side. Mounted on 3" pipe and auto wheel for base. I was going to replace the bearings and clean it up and I think it will be fine. Now I need to figure out what the other problem is now../

I have a 1/2 HP, 6" Craftsman I bought new about 35 years ago, the square frame style. Still use it today. My main go to is a 8" Jet I bought new about 5 years ago. Super smooth grinder.

Thanks for the input
 
OK fellows,
I got the grinder apart to replace the bearings and thought I would check the runout on the armature shaft. One end is around 1/2 thou, the opposite end is about 4-5 thou. Do you think that is acceptable in a bench grinder? The shaft if about 17 inches long. Also, there is not a centrifugal switch in the motor, so must be the capacitor, have not checked it yet. Any suggestions.
 
almost sounds like it was dropped and bent at some point. And I know that some grinding wheels are not that tight on the shaft so it might be able to adjust a bit of it out.
 
Might have been dropped Ken, don't know. I cleaned up the center drill holes on the shaft and measured the run out again. It averages about 1.5 thou on each end. I guess thats not too bad.
 
Yea, That does not sound a bad, and like I said the wheels don't normally fit real tight, thus you get a little play adjustment on them. Does it vibrate when it spins at full rpm, or have you tried it yet.
 
kvt said:
Yea, That does not sound a bad, and like I said the wheels don't normally fit real tight, thus you get a little play adjustment on them. Does it vibrate when it spins at full rpm, or have you tried it yet.
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Ken, I started it right after I got it home from purchase. It does have a slight vibration, with wheels removed. I ordered new Japanese bearings for it, be here Monday. I don't expect it to be Baldor quality seeing how it is made in China. I machined some aluminum bushings for the wheels when I put it all back together.
 
Sandia said:
OK fellows,
I got the grinder apart to replace the bearings and thought I would check the runout on the armature shaft. One end is around 1/2 thou, the opposite end is about 4-5 thou. Do you think that is acceptable in a bench grinder? The shaft if about 17 inches long. Also, there is not a centrifugal switch in the motor, so must be the capacitor, have not checked it yet. Any suggestions.
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Probably good enough-- If good enough won't do, mark the high point, put it across
soft supports- hard wood- a whac with a hard wood " punch " and a hammer.
BLJHB
 
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