Removing bearing inner races from shafts. - The Combine Forum
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Old 11-11-2011, 04:49 PM   #1 (permalink)
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Default Removing bearing inner races from shafts.

Hey guys; Anybody have any good ways to remove inner bearing races from shafts? For straight through shafts and small shafts I've got no problems, just use a zip disk on a grinder, cut them almost through and break it with a chisel or press them off. But bearings against shoulders are a headache because you can't cut them right to the edge, you can't get behind them with a chisel or you damage the shoulder, heating doesn't seem to help and they are to large to get into a press. I e smashed a few but that doesn't seem to work on most, espeasially the large ones (I'm fighting with the outer wheel bearing on our 8970 right now). Do induction heaters work for something like this? Or is there a trick like welding around the inside of the outer race to remove it from the bore? I always have trouble with these, I always get them but there must be a better way.
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Old 11-11-2011, 05:42 PM   #2 (permalink)
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weld something directly to the race so you can beat on it or pull on it.
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Old 11-11-2011, 06:29 PM   #3 (permalink)
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Never thought of that, maybe a 5/8" fine thread nut or two that I can attach my slid hammer to.
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Old 11-11-2011, 06:46 PM   #4 (permalink)
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Just make two cuts with an oxygen/acetylene torch and it will pretty much fall off or out as the case may be. Use fairly high oxygen pressure so it will blow hard and pull it back a bit once it gets cutting. The shaft or housing tends to not be preheated enough to get nicked. You need to be good with a torch and do it quick.

No Hassle
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Old 11-11-2011, 06:55 PM   #5 (permalink)
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In a different case with an entire ball bearing in a housing and a shaft stuck inside. Blow the cage and the balls out with the torch one at a time. Get things pulled apart, or even if you don't intend to separate the shaft from the housing, just cut both races into two halves.

Smoke And Fire Gets Things Done

Last edited by Haystack; 11-11-2011 at 07:03 PM.
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Old 11-11-2011, 07:24 PM   #6 (permalink)
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I cut in two with the torch but it always nicks the shaft a bit, I don't like that.
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Old 11-11-2011, 09:03 PM   #7 (permalink)
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Always preheat one edge of race directly towards the centre of the shaft, change torch angle 90 degrees and start cutting, do both sides on shaft and the race will basically fall off. I very seldom nick a shaft doing it this way.
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Old 11-11-2011, 09:07 PM   #8 (permalink)
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Air-arc is the cadilac when it comes to cutting bearings.
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Old 11-24-2011, 12:52 AM   #9 (permalink)
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I have had this work but not all the time. I heated the inner race cherry red and then poured water on it and then it has cracked. Works once in a while but not always
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Old 11-24-2011, 02:53 AM   #10 (permalink)
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Cut it with a torch on two sides and be done with it. Do it multiple times a year and have yet to nick a shaft.
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