All, One problem I have always ran into on lapidary equipment is tear
down to replace parts. I have been experimenting with ways to make
shaft spacers, bearings, screws, pulleys, etc easier to remove.
Today I had to tear down my 4 station grinder for maintenance. The
machine was last tore down 18 months ago. Everything went very
smooth. Before I reassembled the machine 18 months ago I had applied
a layer of wheel bearing grease on the shaft and inside all the screw
holes. This tear down was the easiest I have ever done. In less than
one hour I was back in business. In the past I have tried silicon
oils that did not work near as well. I also put wheel bearing grease
on the outside of the sealed bearings. Hopefully to stop the water.