Warming timken axle bearings to ease installation?
#1768238
03/01/15 01:49 PM
03/01/15 01:49 PM
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Joined: Oct 2008
Posts: 157 Winlock, Wa
fshd4it
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I just got a new set of timken A-7 bearings, to put on stock axles, for the 8 3/4 that's going in my challenger... and was wondering if warming them up to 200 degrees in the oven would make pressing them on any easier. I have a 12 ton harbor freight-style press for the job. When I did the set on the belvedere several (10?) years ago, I seem to remember there being some grunt required to push those bearings on. I don't recall, however, the size, quality or condition of the press I used...which could have been part of the issue. Timkens website says not to exceed 300 degrees on cones, so I thought I'd stay well on the safe side. Opinions?
In order to know what you want, you'll probably have to find out what you don't want.
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Re: Warming timken axle bearings to ease installation?
[Re: rustbuckett68]
#1768240
03/01/15 02:13 PM
03/01/15 02:13 PM
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Joined: Oct 2008
Posts: 157 Winlock, Wa
fshd4it
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I've heard that light bulbs make great little bearing heaters. I'm planning on putting a bit of oil on the axles' surfaces also, as I cringe at dry installation. The FSM I have is pretty short on info, othe than how to use their special bearing installer.
In order to know what you want, you'll probably have to find out what you don't want.
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Re: Warming timken axle bearings to ease installation?
[Re: GoodysGotaCuda]
#1768244
03/01/15 10:55 PM
03/01/15 10:55 PM
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Joined: Oct 2008
Posts: 157 Winlock, Wa
fshd4it
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Roger that, no oil. Didn't think about it getting trapped under the bearing. Somewhere I've got a piece of heavy wall aluminum pipe that worked perfectly last time I did this, figured it was soft enough not to score the bearing surface on the axle. Warming is no problem, as I have an old electric smoker in the shop. Works great for heating, drying etc, even if the first few parts came out smelling like bbq... Thanks for the replies, hopefully I can get back on this project tomorrow.
In order to know what you want, you'll probably have to find out what you don't want.
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Re: Warming timken axle bearings to ease installation?
[Re: fshd4it]
#1768245
03/02/15 02:38 PM
03/02/15 02:38 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
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You guys using 100 watt lightbulbs, enjoy them while they last. They're against the law to manufacture or import for sale in the US since a few years ago.
I support energy efficiency because it is the right thing to do with the gift of Earth that God has given us, but some things are just plain stupid. Die, energy Nazis!
R. (inappropriate political comment free of charge)
Last edited by dogdays; 03/02/15 02:38 PM.
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Re: Warming timken axle bearings to ease installation?
[Re: MO_PA]
#1768246
03/02/15 04:33 PM
03/02/15 04:33 PM
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JohnRR
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Quote:
You can safely warm them to about 400* then just drop them on and let them cool.
400 is too high , We have an SKF bearing heater at work, it's an induction style , its set at 250 degrees.
Warming to 200 degrees in an oven will be fine , it's a press fit so putting oil on to aid the fit is a waste of time, and oil, the bearing will just scrape the oil off and trap it between the inner race of the bearing and the point that it seats against on the axle leaving the bearing not fully seated.
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Re: Warming timken axle bearings to ease installation?
[Re: 6PakBee]
#1768249
03/03/15 12:57 PM
03/03/15 12:57 PM
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Joined: Jan 2003
Posts: 75,020 U.S.S.A.
JohnRR
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Quote:
I do not agree with any of the comments about not lubricating a press fit. IMHO doing press fits dry with certain materials is just asking for a gall. If you go through the FSM when a press fit is done (piston pins for example) the procedure typically starts out with some kind of lubrication (admittedly suspension parts are an exception). For this specific example, I just don't buy off on the concept of lubricant holding a bearing off the shoulder of the axle. If I put a dab of grease on the jaws of a pliers and close it, the result is metal to metal contact. I can't see where this would be any different.
Can you see a .001/.002 thick film with your naked eye ?
We can agree to disagree ...
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Re: Warming timken axle bearings to ease installation?
[Re: JohnRR]
#1768251
03/04/15 12:09 AM
03/04/15 12:09 AM
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Joined: Jan 2003
Posts: 4,270 Morrow, OH
markz528
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Morrow, OH
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Quote:
Quote:
You can safely warm them to about 400* then just drop them on and let them cool.
400 is too high , We have an SKF bearing heater at work, it's an induction style , its set at 250 degrees.
Warming to 200 degrees in an oven will be fine , it's a press fit so putting oil on to aid the fit is a waste of time, and oil, the bearing will just scrape the oil off and trap it between the inner race of the bearing and the point that it seats against on the axle leaving the bearing not fully seated.
230 Deg F is a better target than 250. 250 is a bit high.
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: Warming timken axle bearings to ease installation?
[Re: markz528]
#1768252
03/04/15 02:41 AM
03/04/15 02:41 AM
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Joined: Dec 2009
Posts: 339 Gilroy,CA.
mopardude318
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you could also, if you have a large enough freezer, put the axles in the freezer! yes it works, ive done it. ive done it countless times when installing ball bearings on motorcycle crank shafts. throw the crankshaft in the freezer for a few hours. same for an axle...you'd be surprised.... happy moparing.
408 Stroker 533 HP 520 FT LBS...........................1970 Dart RMS AlterKation
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