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Home✈️Aircraft🚁Helicoptere-AlignOther › How do you remove a busted bearing in the aluminum tail gearbox?
09-09-2006 06:56 AM  14 years ago
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EddieNewYork

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Los Angeles, CA

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How do you remove a busted bearing in the aluminum tail gearbox?
Hey guys, for 2 hours I've been trying to pry out the busted bearing out of the aluminum tail gearbox. The only thing that's left is the most outer ring of the bearing. Please help!!
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09-09-2006 07:16 AM  14 years ago
alwallash

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I have not removed that one, but generally you heat up the bearing holder in the oven or gently with a propane torch. The metal expands more than the bearing and the bearing drops out or is removed easily .
Good luck.
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09-09-2006 07:17 AM  14 years ago
Beezer

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Ontario, Canada

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Have you tried heating up the aluminum around the bearing with a heat gun? That will usually expand the aluminum enough to allow the bearing to drop out. Unless of course retaining compound was used on the bearing.
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09-09-2006 07:22 AM  14 years ago
EddieNewYork

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Thanks guys, let me try that.
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09-09-2006 07:33 AM  14 years ago
EddieNewYork

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No luck with the heat gun. I don't have a torch, so how long and how hot can I bake this in the oven?
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09-09-2006 07:38 AM  14 years ago
Beezer

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I would say around 400 deg. but I never tried the oven before to remove a bearing. To insert one yes. The only problem you might have is the outer race of the bearing will also expand if it is heated. Might not expand as much as the aluminum though so it is worth a try.
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09-09-2006 07:40 AM  14 years ago
Beezer

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Might as well make up some cookie mix and throw those in the oven too.
At least you would have something to show for if the bearing doesn't come out. HEHE
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09-09-2006 07:42 AM  14 years ago
EddieNewYork

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lol, how do I leave it in?
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09-09-2006 07:52 AM  14 years ago
Beezer

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Just put it on a small metal pan so you can remove it from the oven easily and try leaving it in for about 10 minutes after the oven is pre-heat and see if that works. If it doesn't try abit longer.
If you notice the anodizing changing colour then pull it out right away.
Like I said I never tried the oven method for removing bearings. I always used a heat gun or a propane torch. The propane torch will cause the anodinzing to change colour if the part gets too hot.
I also would take the part after I heated it up and hit it on a piece of wood to use kinetic energy to drive the bearing out but since you only have the bearing race left there might not be enough mass left for this to work.

Be sure to wear some gloves since it will be hot.

Good luck
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09-09-2006 08:04 AM  14 years ago
EddieNewYork

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Hey Beezer, thanks a lot. I'll give it a shot.
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09-09-2006 08:07 AM  14 years ago
Beezer

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My pleasure. Let us know how it works out.
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09-09-2006 03:36 PM  14 years ago
KamikaziRcPilot

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Cincinnati, OH

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I'm using the Align aluminum tail case and I just tapped them out. I used an allen wrench that just fit into the hole from the outside, placed the case plate on a piece of wood that I drilled a hole slightly larger than the outer diameter of the bearing, then lightly tapped on it. Both bearings came out with just a few hits.
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09-10-2006 09:20 AM  14 years ago
EddieNewYork

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Los Angeles, CA

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Hey Beezer, the oven thing didn't work, but probably because I only left it in for 5 minutes (scared),and perhaps probably because I dented the bearing while I was trying to hack away at it. The good news is, I used a dremel tool and was able to cut it out. Thanks again for for the help.
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09-10-2006 09:21 AM  14 years ago
EddieNewYork

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KamikaziRcPilot, the reason I couldn't tap it out was because only the outer race was left stuck inside.
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Home✈️Aircraft🚁Helicoptere-AlignOther › How do you remove a busted bearing in the aluminum tail gearbox?
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