Re: changing bearings lortone combination unit
Did you buy the machine new? How old are the wheels on the machine? Are the wheels silicon carbide or diamond? If silicon carbide wheels are they dressed properly? If diamond have you checked to see that there isn't any buildup on the inner part of the wheels that may cause an imbalance? Even the slighest imbalance can cause a real ruckus. Is the drive belt in proper allignment? Some things to consider looking into before tearing your machine apart.
As for removal of the bearings. I have used a piece of pipe that was just large enough to fit over the arbor/shaft. If you use a piece of pipe make certain the inner edge is beveled and smoothed to not cause any damage to the arbor/shaft. After making certain that any setscrews are loosened that may be securing the bearings to the arbor simply slide the pipe down and over the arbor and with a hammer begin by tapping lightly downward. Let me step back a moment and mention that before anything you need to thoroughly clean the entire bearing/arbor assembly, and I do mean thoroughly. A major cause of binding when removing the bearings is dirt. It wouldn't hurt to spray it all down with something like WD40 or equivalent and let it sit overnight to soak in. Also, after cleaning apply a liberal amount of lubricant to the entire assembly. The worse thing you can do is to be brutal to the assembly. One very small scratch can be disasterous. The tolerances are very tight on these parts.
From Ward - November 07, 2012 at 22:54:10