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10-20-2019, 03:13 PM | #21 | ||
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Join Date: Aug 2010
Location: Tonopah, NV.
Posts: 283
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Re: Why did my axle break?
Quote:
Quote:
Hey, if it only breaks every 90 years, I'm good with it.
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10-20-2019, 03:22 PM | #22 |
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Join Date: Nov 2010
Location: Sebastian, FL
Posts: 479
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Re: Why did my axle break?
I had one crack and was lucky someone following me tooted and told me my right rear wheel was wobbling. Shure enough when I took it apart there was TWO cracks and would not have lasted long. I took the oppurtunity to take everything off up the the engine while I had it apart. After lots of $'s and 6 months of putzing it is back together and running fine. I got two used axles from Bert's and am VERY satisfied with everything I have got from Steve. He also knows just about everything you ever need to know about the A's and gives great advice!!! Jim
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10-20-2019, 04:16 PM | #23 |
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Join Date: May 2010
Location: Southern California
Posts: 3,131
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Re: Why did my axle break?
I had a job a while back where the failure mode was the gear end of an original axle shaft sheared where the gear attached to the shaft. There were actually two failure modes. Years before the differential had been overhauled by someone who did not understand carrier pre-load. When the car was back on the road the rear was locked. Henry's 40 horses broke it loose. Usually it does so by spinning the carrier bearings on the mounting hubs. In this case it was locked so tight that it sheared the hub on the ring side of the carrier. The car operated like this for about 8 years before the heat cycling finally got to the axle shaft and the left axle shaft sheared right at the gear next to the sheared carrier hub.
See the attached link for photos. Tom Endy http://www.santaanitaas.org/wp-conte...ilure-2018.pdf |
10-20-2019, 06:48 PM | #24 |
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Join Date: Apr 2018
Location: Mebane NC
Posts: 2,355
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Re: Why did my axle break?
If I want to check the torque on those axle nuts, do I need to remove the wheel or can I just remove the hub cap? May be a stupid question, but I'm having trouble visualizing it.
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10-20-2019, 07:05 PM | #25 | |
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Join Date: Jul 2012
Location: Australia/USA/EU/Soviet Russia
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Re: Why did my axle break?
Quote:
Tom, perhaps you can get a hold of one the new one piece axles Steve from Berts mentioned and let us know what you think.
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10-20-2019, 07:20 PM | #26 |
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Location: South East Wisconsin
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Re: Why did my axle break?
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Alexi_ There is a cotter pin to remove in order to check axle nut torque. It will be much easier to remove the wheel in order to get the cotter pin out and back in later. If there is no cotter pin in your axle, by all means install new cotter pins. |
10-20-2019, 07:34 PM | #27 | |
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Join Date: May 2010
Location: Alabama
Posts: 8,099
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Re: Why did my axle break?
Quote:
I would just remove the hub cap . Removal of the hub cap may require the removal of the wheel to bend back tabs If you have an extra wheel and tire without a hub cap , maybe you could temporarily use it and save having to remove the hub cap on your nice painted wheel . After the axle nut is retorqued the original wheel can be replaced The 28-29 hubcaps can sometimes be snapped off like a modern hubcap |
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10-21-2019, 09:45 AM | #28 |
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Join Date: May 2010
Location: Long Island, NY
Posts: 3,470
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Re: Why did my axle break?
100 ft-lbs torque on the axle nut is extreme in my opinion as it increase the tensile stress in the axle shaft. Cracks occur in tension stress fields. I run with 50 ft-lbs, and have not had any issues doing so in over 50 years of Model A'ing.
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10-21-2019, 10:12 AM | #29 |
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Join Date: Apr 2018
Location: Mebane NC
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Re: Why did my axle break?
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10-21-2019, 10:19 AM | #30 |
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Join Date: Apr 2013
Location: Northwest CT
Posts: 1,092
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Re: Why did my axle break?
According to my bolt chart, Grade 5 5/8-18 is good for 170ft-lb dry. Assuming the axle shaft is not quite grade 5 and with 90 years of use and fatigue I definitely wouldn't want to go over 100ft-lb. Last time I did mine I went to 90 and then lined up for the cotter pin.
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10-21-2019, 01:21 PM | #31 | |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Why did my axle break?
Quote:
I think worn wheel bearings and axle tube could allow more flex and could be a contributing cause to broken axles. I'm an easy driver, and have never broken an axle. Hole shots, and spinning the wheel on mud or ice can certainly snap an axle. |
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10-21-2019, 11:03 PM | #32 | |
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Join Date: Apr 2011
Location: South pacific island
Posts: 1,724
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Re: Why did my axle break?
Quote:
200 for a rotary flywheel nut maybe, but you'd pull the axle right through the hub at 200 on a ford.
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<Link> This is how we roll<Link> "I'm Convinced that no one really reads posts anymore; they just fabricate what they think the post says then ramble on about red herrings."--Bob Outcasts rules of old cars #1 Fun is imperative, mainstream is overrated #2 If they think it is impossible, prove them wrong #3 If the science says it impossible you are not being creative enough. #4 No shame in recreating something you never had #5 If it were not for the law & physics you would be unstoppable |
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