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Replacing Bearings on Powermatic 66
I'm beginning to notice my 5 hp powermatic 66 seems to be making quite some noise lately, and I'm thinking it may be coming from the arbor bearings. I measured runout with a dial indicator and it seems to be in the .004-.005 range.
My first question is, is that tolerance normal? I can't see where it is a problem with the cut quality.
My second question is, how loud are these saws normally? I only have a sears craftsman direct drive 2hp saw ( mid 1970's) to compare it to, and that thing is dead quiet. (I know I'm comparing apples to oranges here) I wish I could post a sound bit of the noise here for you to hear. It's not a squealing or metal on metal sound, just like a loud rumbling. Very loud in my opinion. The saw is a 2001 model that I bought used, however it was only used for about a year by the previous owner and looked to be brand new when I got it.
If I can determine that the bearings need to be replaced, how hard is that to do? Will I need the help of a machine shop to press the bearings in? Will I need to remove the saw's top? It seems like I can get to the arbor shaft without removing the top, which I would rather not do.
Would any of the noise be coming from the belts? Seems unlikely, and the belts appear new, and not worn at all.
Can the bearings be lubricated? I don't see a way to or mention of that in the owner's manual.
How hot should the arbor nut/blade be after use? I have changed the blade immediately after use a few times and noticed the arbor nut/arbor and blade were fairly hot, but I assumed this was normal from the cutting. Not sure how hot is too hot, or if hot at all is a normal thing.
Sorry for all the details, but I figured the more info I gave, the better it would be for someone trying to help.
Any and all help would be greatly appreciated.