I really don't know about the bearings. I have had it a long time and have never had a problem. It seems to take a abuse pretty well. One of the things I like about it is you can reverse the the angle shaft to change the gearing. I have never done it but I believe you can remove the angle and use it as a straight drill.
My dad had one for years... He was a plumber and after the first one disappeared off the truck he chained it to the seat in the van along with the Milwaukee Sawzall.
Rege
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