The spindle assembly is held in place by two collars: one to apply pre-load to the bearings, and the second one as a locking nut. When I figure out how to adjust the bearings for pre-load, then I will add details in a separate page… Details of part numbers & sizes for the bearings and shim washers are below. Pulling the spindle is not a difficult or time-consuming job. The front one was clearly dished, and the rear one was a bit wavy, rather than flat. The shim washers however were in less good shape. I could see very little sign of wear in the bearings, so I could have just cleaned / re-greased and re-installed them rather than installing new ones. The existing bearings in the lathe were marked with ‘Poland’ and ‘USSR’, so I think they were the originals (from the lathe’s manufacture in 1989). I was keen to show off the engineering skills I had collected, however the 90mm-long piece came out tapered…īefore messing with the screws clamping the way to the head, I decided to at least have a look at the bearings. Paying some attention to the spindle bearings came about after a very good friend (and also my inspiration for all this machining malarkey) needed a simple alignment tool to aid assembly of a powered bifold door.
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