Hi guys - I'm new around here, and I've really enjoyed reading through all the great info here!
I'm looking for some information about ball bearings. I'm cleaning up a woodworking table saw I got at a yard sale, and I've decided to replace the arbor bearings while I'm at it. I took one of the old ones to the local bearing supply house, and got some replacements. I asked about higher quality bearings, and basically got a grunt about them being more expensive.
I'm concerned about the amount of axial play in the inner race of the new bearings. Its not a lot, but its easily noticable when trying to move it back and forth by hand and is more than I want the blade to move axially.
Here's the setup (dimensions approximate):
0.5" shaft, 1" bore through casting for shaft. Each end of the bore in the casting is enlarged to ~1.25" to fit the bearing OD. Bearings are pressed onto the shaft, but will just slip into the casting. So, assembly is:
press one bearing on shaft
put shaft through casting, seating one bearing in casting
press other bearing on opposite end of shaft until seated in casting.
Old bearings: NTN 6202Z. Also marked NTN canada B45-123083-A000
New bearings: FAG 6202.2ZR.C3
Should I worry about this axial play? Is it normal? After a little reading on bearings, I think it may disappear when the shaft stretches the inner race slightly during pressing. Am I way off here? When pressing the second bearing on, do I need to press a little past the fully seated position to give a kind of axial pre-load?
Thanks for your help!