Quote:
Originally Posted by Merk
You want a flat surface. It's next to impossible to do that with a disc or belt sander. A sander will leave high and low spots. Whoever told you it's ok to use a belt sander told you wrong or was too lazy or cheap to do the job right.
I chuck up on the collar that the pin goes thru. I use a 3 jaw chuck. I do not use a tailstock to center the pressure plate.
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I'll play the devil's advocate......a woodworker will do final prep of a chisel or planer knife using fine grit sandpaper that is taped to the machined surface of his table saw or even a piece of glass, so it is super-flat. Our tiny 'O' pressure plates easily fit on our 12"
stationary disc sander (not a belt or palm sander which I agree would be nearly impossible to keep flat) and with a gentle hand, came out just fine. All we were doing was taking a few thou off of rust and grime. And, we also 'kissed' the clutch material as well to take the shine off of it. Our clutch works flawlessly, even with double the horse power and original spring, it does not slip.
Again, the bore on the pressure plates isn't even near exact enough to ride perpendicular on the shaft, so it might deflect a few thou from being perfectly perpendicular to find it's way.
I agree the lathe is the best option, so long as you have the knowledge.