I repaired a similar problem on a cheap grinder by turning new washers to locate the wheel. They were about 12mm thick and a tap on fit to the large diamiter with a step internally to stop it sliding on too far and the outside was a washer diamiter with the loose fit on the grinding wheel so it would locate the grinding wheel. The original washer and nut for the outside is OK as it is just pushing the wheel onto the new location and paper washers.

David

Edited By David George 1 on 20/07/2020 22:31:05

Ive just completed the upgrade to an old off hand 6" grinder as described here **LINK** I followed the instructions in Harold Halls book, Tool and cutter Sharpening No38 in the workshop practice series

MickyT

I was always told to use a washer of blotting paper either side of the wheel and under the washer. Fortunately I have a good supply as I like it on my desk as I use fountain pens when I can but it is still available on eBay, even if nowhere else.

I had a similar problem and fixed it with a flange bushing. I made the smaller diameter the size of the hole in the grinding wheel. The flange takes the place of the washer. I had some 2 inch diameter steel and used that. I dished out the flange by about .010 to .020 inches. I left about 1/2 inch on the outer edge of the flange. That way only the outer portion of the flange pressed against the grinding wheel. I used a reamer in the inner hole so that it was a close fit on the shaft. I reused one of the provided washers on the outside of the grinding wheel. Worked well.

Many wheels are supplied with a 1 1/4” hole and bushes to suit your shaft. I made the inner flange to include the 1 1/4” bush so it is extra long and less inclined to wobble. It is worth checking that the spindle runs true in its bearings and also between centres if the spindle has the centres in the end, if the shaft run true on the centres then if the new flange is a push fit on the spindle then it could be trued when mounted on the spindle. A new wheel will need to be dressed as even when brand new they are not perfect. I personally think a single point diamond and a guide to ensure the wheel is trued accurately is best. My drill grinder has a fixed diamond and the wheel head traverse slide ensures a dead true wheel, unfortunately truing the wheel is a filthy process and if you forget to close the guard to contain the grit it goes everywhere. I must get the dust extraction working.

Mike

+1 for Mike Pooles idea of integrating the flange and the bush. It completely solved my wheel wobble problems. I now have a bench grinder that is a pleasure to use.

Peter

For blotting paper I would suggest trying Jespers in Harrogate , Castlegate in Wetherby or Fred Aldous in Manchester , Leeds and Sheffield .

I copied the wheel mounting arrangement off a Ferret grinder, a 1.25" diameter sleeve over the existing shaft secured by grub screws, this sleeve had a shoulder for new big flanges, Mike Poole's idea is even better.

As bought the grinder would walk round the bench, now it is very civilised. I use beer mats instead of blotting paper, but lots of wheels come supplied with suitable washers