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[Old Timer]

Hey GeoTech,
I finally got my Poly unit apart as I had to put a new belt on it. Man it was tough. It has sat for probably 30 years. I think the combination of soaking everything down with PB-Blaster and leaving it out in below freezing temps helped. I did bugger up the first 2 threads on the shaft and a bearing. I think I can work on the shaft but can't seem to find anything online about the bearings. My bearings do not have set screws. They have a number 88 A 3/4 with the letters ND also on them. Any idea on how I can find these? As I said can't seem to find any online with these numbers. I may need to go somewhere with lots of bearings and see if they can match them.

[Old Timer]

OK correction here. The bearings do not have set screws but there is another piece (collar) between the bearing and the drum that does. I really had practically given up on this thing. The pulley has a set screw but even after taking it out that pulley was froze on that shaft pretty good. I guess if I could provide some advice on this thing again I would say soak it down with PB Blaster and let it set for awhile and then maybe put the whole thing in the freezer

[bobby1]

Hans is in China so it can be a while to get your order filled. I use Johnson Brothers in California. I have compared a few of the expando wheels and they all look identical so they are all probably made in China. I have been doing a lot of lapidary over many years and I use the expando wheels and silicon Carbide belts. I never throw one away because it is worn, only when the seam fails. I have a homemade lapidary machine with two 8" diamond grinding wheels and one expando wheel.
Bob

[Old Timer]

Thx,
I saw a few of the Hans wheels on amazon. Still may need to come from China but heck I have had this thing for 25 years sitting so what's a little more time.