I just discovered a mistake. And for once its not mine!!! The bearings that I bought for the crankshaft were supposedly 3/8" inner diameter. After I took the sideplate out of the milling machine and installed the bearing, I went to fit a piece of shaft in the bearing, and Whoa Nellie----The damned bearing is 5/16" i.d.!!! I checked on the bearing website and there is a bearing with the same outer diameter and thickness, with a 3/8" bore, but its a #1606, not a 1605 as they gave me at the bearing supply house. I will be speaking to them, first thing tomorrow morning!!!