Three years ago I purchased a used Powermatic 15" floor model planer. The planer is about 12 years old or so. It produces a little bit of snipe on the left hand side. To combat this, the previous owner just ran everything through on the right hand side. When I started using it, I was not pleased with the results. (This was also one of the first things I bought when I started woodworking 3 years ago.) I ended up tearing down the planer and finding the rollers were badly worn on the right side. I replaced the rollers, new knives, leveled the bed and now am quite happy with the machine. But it is quite loud as soon as it is turned on. I have to wear earplugs,before I ever feed a board into it. I do not have anything to compare this to noise wise nor do i remember if it was that way before the teardown. Is this normal for planers in general, for this type of planer or have I reassembled something incorrectly causing this whine? I sure hate the thought of tearing this down again but if I did something to cause this whine then it will eventually show me what was wrong in the form of a breakdown. Thanks all.