I have a Pratt & Whitney Tapemate Series C that I retrofitted. I believe it has some backlash because the screws can slide back and forth in the support bearings. I cannot remember how much since it has been awhile since I measured it, but I think it may have been .005" or so.
Does anyone know anything about these bearings or how I can take the slop out? I have not taken them out to inspect. They are angular contact like I see all over the net. I just can't find any explanation of how to adjust them.
I saw mention of some having a spacer that is machined for fit, but nothing is shown in these drawings.
I also read some about setting the preload with tightening the nut. I don't see how this can move anything unless the bearing starts to deform. It appears the races will already be compressed together unless there is a space left in there and preload is determined by tightness of the nut?
Please educate me? It seems like you would have to shim the outer races and then also space out the capture plate the same amount, unless there is a gap in there and the tightness of the nut dictates preload?
I am just not sure what the intentions are. Are you supposed to just buy a matched set of new bearings that are perfectly set when you get some wear, put them in, snug the nut down tight and they just end up right until they start to wear again? Or does the nut tightness have to be set in some special way....
Need help. I have to get as close to zero backlash as I can so I can machine parts for my router.
Thanks