Posted By: DrCharles
How to enlarge ID of bearing? - 11/21/19 02:34 AM
I've cut my column jacket back to the firewall (originally a PS car. Now have manual box and Flaming River U-joint/extension). I bought an "ER-16" bearing that is supposed to work for the lower shaft support... but it won't go on the shaft!
After cleaning up all the crud and rust, and polishing with emery paper, the shaft is 1.005" in diameter. I couldn't even drive the new bearing onto it! So I spent considerable time trying to enlarge the bearing ID with a brake cylinder hone in my drill press. I also tried wrapping emery paper around the stones and running that in and out for a while. I didn't measure the ID before I started, but it's now 1.0025 and still won't go on
I can't heat the bearing race because it's a sealed assembly with rubber seals.
Sanding down the shaft instead isn't a good option because it's hard to reach the place where the bearing will sit (just inside the jacket). I really don't want to take the column apart again (it was enough trouble when I removed the column shift parts and reworked the collar to remove the pointer and shifter nub).
And it does not have to be an interference fit because there are two set screws on the bearing to secure it to the shaft.
I'm considering taking it to a machine shop. Is there some grinding tool they would have, to enlarge it to 1.006 for a slip fit?
Or should I just bite the bullet and disassemble the column, and make the (non-hardened) shaft smaller instead?
After cleaning up all the crud and rust, and polishing with emery paper, the shaft is 1.005" in diameter. I couldn't even drive the new bearing onto it! So I spent considerable time trying to enlarge the bearing ID with a brake cylinder hone in my drill press. I also tried wrapping emery paper around the stones and running that in and out for a while. I didn't measure the ID before I started, but it's now 1.0025 and still won't go on
I can't heat the bearing race because it's a sealed assembly with rubber seals.
Sanding down the shaft instead isn't a good option because it's hard to reach the place where the bearing will sit (just inside the jacket). I really don't want to take the column apart again (it was enough trouble when I removed the column shift parts and reworked the collar to remove the pointer and shifter nub).
And it does not have to be an interference fit because there are two set screws on the bearing to secure it to the shaft.
I'm considering taking it to a machine shop. Is there some grinding tool they would have, to enlarge it to 1.006 for a slip fit?
Or should I just bite the bullet and disassemble the column, and make the (non-hardened) shaft smaller instead?