Ststephen7
Well-known member
You know... I'm often finding myself jealous of the flea market finds other people seem to show off. Well jealous no more!
Just over a week ago I found this 3/4 HP 257.191500 7" x 3/4" x 1/2" block grinder at a local flea market. It was pretty dirty...
The guy wanted $20 for it... I was really surprised that it was still there at 2 pm... I gave him his $20 and took it home.
It ran fine, however there was a nice scraping/grinding (ha) noise, so I order up some new bearings.
I took it all apart and cleaned it up with some simple green.
I don't have a press, so I used a brass hammer to knock off the old and knock on the new bearings. And... even with the brass hammer I managed to mushroom both ends of the shaft. After a couple of hours with a matching thread file (I only have one, and happened to have 20tpi) and a 1/2" x 20 tap, I managed to fix the threads and get the nuts to go back on.
It has all of the parts with the exception of the quench tray. The eye shields are yellowed and blotchy.
While both wheels seem to be original, the course one makes the grinder vibrate enough to shake the whole house. It runs great with only the fine on one.
I watched a few videos on getting rid of this problem and tried (and failed) to use tape the move the wheel where it needed to be. Then I put the 4 large wheel flanges on the lathe and trued the surfaces where they **** up against the shaft and the wheel, with no improvement at all. So... I just removed the bad wheel until I can get another. I may (probably will) have another go at getting it to run with less vibration.
I did move the fine wheel to the other side, and it ran fine over there, so it's the wheel.
It was in such good shape I didn't even feel the need to paint it! I just cleaned it up and put it all back together.
My pictures are not showing up (at least for me), so if you can tell me the correct way to post them I'll get a couple up. I uploaded to imgur, clicked add image, and pasted the link there...
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Just over a week ago I found this 3/4 HP 257.191500 7" x 3/4" x 1/2" block grinder at a local flea market. It was pretty dirty...
The guy wanted $20 for it... I was really surprised that it was still there at 2 pm... I gave him his $20 and took it home.
It ran fine, however there was a nice scraping/grinding (ha) noise, so I order up some new bearings.
I took it all apart and cleaned it up with some simple green.
I don't have a press, so I used a brass hammer to knock off the old and knock on the new bearings. And... even with the brass hammer I managed to mushroom both ends of the shaft. After a couple of hours with a matching thread file (I only have one, and happened to have 20tpi) and a 1/2" x 20 tap, I managed to fix the threads and get the nuts to go back on.
It has all of the parts with the exception of the quench tray. The eye shields are yellowed and blotchy.
While both wheels seem to be original, the course one makes the grinder vibrate enough to shake the whole house. It runs great with only the fine on one.
I watched a few videos on getting rid of this problem and tried (and failed) to use tape the move the wheel where it needed to be. Then I put the 4 large wheel flanges on the lathe and trued the surfaces where they **** up against the shaft and the wheel, with no improvement at all. So... I just removed the bad wheel until I can get another. I may (probably will) have another go at getting it to run with less vibration.
I did move the fine wheel to the other side, and it ran fine over there, so it's the wheel.
It was in such good shape I didn't even feel the need to paint it! I just cleaned it up and put it all back together.
My pictures are not showing up (at least for me), so if you can tell me the correct way to post them I'll get a couple up. I uploaded to imgur, clicked add image, and pasted the link there...
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