How to enlarge ID of bearing?
#2717946
11/20/19 10:34 PM
11/20/19 10:34 PM
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Joined: Apr 2006
Posts: 4,220 West Plains, MO
DrCharles
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West Plains, MO
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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?
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Re: How to enlarge ID of bearing?
[Re: DrCharles]
#2717956
11/20/19 11:21 PM
11/20/19 11:21 PM
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Joined: Oct 2005
Posts: 8,868 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,868
Ontario, Canada
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A brake hone with coarse stones should have made quick work of that !! Best done in a bath of solvent to keep the stones clear to cut. Also, don't run the drill too fast.
Last edited by Stanton; 11/20/19 11:23 PM.
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Re: How to enlarge ID of bearing?
[Re: Stanton]
#2717961
11/20/19 11:43 PM
11/20/19 11:43 PM
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Joined: Jan 2003
Posts: 4,270 Morrow, OH
markz528
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Morrow, OH
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A brake hone with coarse stones should have made quick work of that !! Best done in a bath of solvent to keep the stones clear to cut. Also, don't run the drill too fast. I agree with that. Setting that up in a lathe with a tool post grinder and taking off less than 0.002" per side is not super easy. I would recommend a hone to open it up, but being a bearing I would use liberal wd40 and keep the fluid out of the bearing.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: How to enlarge ID of bearing?
[Re: rustbuckett68]
#2718046
11/21/19 11:24 AM
11/21/19 11:24 AM
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Joined: Jan 2012
Posts: 2,637 Stuttgart, Arkansas
rickseeman
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Stuttgart, Arkansas
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Any automotive machine shop has a Sunnen rod hone. He has a .990" mandrel for BBC piston pins. He can hone it out for you in a few minutes.
2011 Drag Pak Challenger
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Re: How to enlarge ID of bearing?
[Re: Stanton]
#2718050
11/21/19 11:35 AM
11/21/19 11:35 AM
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Joined: Jan 2003
Posts: 10,707 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,707
North Dakota
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You could dick around for days with that bearing. You're probably further ahead to pull the shaft and do a quick grind on it being that its softer material. If you ever have to replace the bearing for any reason, you'll be going through this malarkey again. Decreasing the shaft diameter solves the problem now and in the future.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: How to enlarge ID of bearing?
[Re: 4406bbl]
#2718081
11/21/19 01:06 PM
11/21/19 01:06 PM
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Joined: Apr 2006
Posts: 4,220 West Plains, MO
DrCharles
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Success Thanks for the hot tip, 4406bbl I wouldn't have believed it either... so I tried it A couple minutes back and forth, round and round with a 1/2" sanding roll and opened it right up to 1.006 It went on the shaft like butter! Saved me a trip to a machine shop... thanks again.
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Re: How to enlarge ID of bearing?
[Re: 6PakBee]
#2718192
11/21/19 07:46 PM
11/21/19 07:46 PM
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Joined: May 2005
Posts: 4,713 Florida
BDW
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