Bearings Clearance Basics - Best Bearings Photo Gallery
Use a dial bore gauge (they’re available from Powerhouse for about a hundred bucks) in the inner diameter (id) of the bearing. Position the gauge so that it’s vertical in the bore and rock it back and forth until you get the smallest reading (that way you know the gauge is truly vertical). Be careful not to measure the groove in the bearing shell. Now zero out the dial indicator.