Posted by Ken Macfarlane on October 01, 2012 at 17:18:23 from (220.127.116.11):
I bought a rough CIH 3309 discbine as a backup machine. I've been patching it back together and started into the drive shafts. The carrier bearing was run seized for what appears to be a season.
The rear shaft is a normal 540 male spline at a support bearing going back to a yoke on the gearbox. Tri-lobe metric shaft.
The yoke has a roll pin that I can remove. The spline and shoulder for the bearing are welded in. The shoulder is worn undersized by the old bearing by about 1/8 to 3/16 in diam.
Its way to long to fit in my lathe.
I'm looking at taking a piece of I beam and clamping some dead centres on there to make a bit of a welding positioner. Then bolting my cross slide vice onto it with a grinder held in the jaws to grind the bearing surface.
Some folks I've worked with would probably suggest that its just a back up machine and put some form a thread on it, slide the bearing on and leave it be.
I've only ever built up pins etc that fit in a proper lathe that you can turn them down with after.
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