Go ahead the were made "soft".
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Front Axle Info!
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Mike, by heating the axle, is there a chance of hardening or tempering it ? Do you let it cool down by itself or can you cool it down faster with some water ? Pat hates to wreck everything he touches and I have a few axles that need the perches removed. Thanks, pAAtModel A's and of course the famous AA's
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because of the taper, the perches are really pounded in there and can be more difficult to remove than anything you have ever done.
If the axle is out of the car, use a press.
If in the car then I would have no problem in using an O/A torch. Propane will not get you where you want to go. I would not quench.
Once the axle is hot then rotate them in the bores to break them free.
The axle is quite strong because of the high vanadium content
The pic Mike put up is from an exhibit Ford did at a World's Fair or some such event to showcase the axle strength
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NEVER heat the axle past about 300-400 degrees!!! It will significantly reduce the 'spring' of the axle. Ford showed the ductility of the metal by putting it in a huge lathe. That is the axle will not break. The metal was special (type EE or AA, that is what those marks indicate).
If the grease starts to smoke stop!!
They are very very tough forged items. They take quite a bit of abuse. When you go to straighten an axle you find it take a lot of pumps (10 ton press) to make a small change on a good axle. One that is heat the a few pumps and the axle makes a big change- like butter.
I found a long throw air hammer with a flat round on a strongly mounted vice (mine is like 150lbs) you can slowly press out the perch with almost not distortion to the threads. You need a long throw air hammer not the cheapo you find all over.
axle straightening
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Front Axle Bending info
Original Thread
Well finally getting parts out of the barn of my 31 roadster. Got looking at the front axle and it looks bent, put a string from end to end and she has a 3/8 to 7/16 pow to the rear. I'll start looking for someone with a press but till then, is there a spec on the bow top to bottom ? or anything else I should look for ? As always, thanks for any help. Mikey
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Here is something that was laying in the chassis tech
https://www.vintagefordforum.com/for...move-the-perch
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Mikey how are you going to know when the axle is bent back to the proper specs when it's not on the car? Whenever I see an axle straightened it's verified on an alignment rack. To save you a lot of agg and since your car is in pieces I would source a good straighter looking front axle.
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Originally posted by Mitch View PostMikey how are you going to know when the axle is bent back to the proper specs when it's not on the car? Whenever I see an axle straightened it's verified on an alignment rack. To save you a lot of agg and since your car is in pieces I would source a good straighter looking front axle.
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Ken Ehrenhoffer (sp) straightens front axles, and has the guide pins used to show when everything is correct.
He also had some for sale at last years swap meet on his property.
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Originally posted by Tom Wesenberg View PostKen Ehrenhoffer (sp) straightens front axles, and has the guide pins used to show when everything is correct.
He also had some for sale at last years swap meet on his property.
Ken may not be to far from Mikey
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Brent.. As you well know, heating steel for forming requires a lot of skill so the material returns to it's original state. If heated improperly, there can be a chemistry change that might affect the composition and integrity of the material being reworked.
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filedata/fetch?id=80234&d=1554106379&type=thumbfiledata/fetch?id=80235&d=1554105992&type=thumb I always think of these pictures when people say heating the axle destroys it.
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Fore and aft bends are done out of the car. caster camber can be done on the car with the right tools. here's the Ford recommended tools. note the caster camber is adjusted between the perch and kingpin.
Studio_20180501_190955.pngStudio_20180501_191037.png
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FWIW, the forging process and treating process gives the axle the properties that allow it to take a lot of repeated hits and not keep a bend. When the axle is heated past a certain temp it losses this at that area and will take significantly less force to affect a permemant change.
How do I know this read the reposting of axle straightening I wrote.
The fact is when you heat the A axle it looses the properties that allow it to not deform without a lot of force. What does this mean, well consider that curb hit. A regular axle will take it and return to it original position, a heated axle may move a fraction of a inch upon return. Over time you will have the axle move. Just the heated ones are going to move a lot more.
Oh, yea before you tell me that you have one and it looks fine, measure it.
Now do not get me wrong. I know that most guys will never have a problem as they hardly drive their cars. Plus often (as least in what I have seen) the axle mis-alignment is minor problem in the whole scheme of their car and how it was put together. That is more often then not the modified cars are not engineered very well.
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Original Thread
On a good front axle...What is the measurement, diameter wise, of the holes where the King Pin is inserted to?
Thanks.
Pluck
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I found my axle documentation and checked some of my parts. I got out a pair of Ford king pins and took some measurements. I first went over the surfaces with a fine scotchbrite pad. The first one measured .8124"- .8125" The second measured .8120"- .8121".
I already had an axle out in the shop with clean eyes. The smaller pin would go in both eyes under it's own weight and show a very subtle wobble. The larger pin required rotating the pin to get it through both eyes! And of course, no wobble at all. What a difference a few ten thousandths of an inch makes!
Okay, now to the specs. I wish I had some on the pins but I don't. The axle eyes were originally specified as reamed to .812"- .813". In January 1929 they loosened it to .812"- .814".
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by davewWill I have any steering issues if I put on a 2 inch dropped axle? I have put in a reversed eye front spring and would like to drop it just a little more. I talked to okie joe and he has axle, spindles, kingpins, perches for it. What do you think?...
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You need to keep the axle taper clean dry and smooth, and keep the axle nut tight to prevent damage like this.
I wonder if someone was spinning the rear wheel, then hit dry pavement to do this much damage?
This is the second free axle I got with this kind of damage.
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by Cape CodderI would like to hear opinions of having the Front Axle repaired i.e. the King Pin holes! One side seams to have a burr BUT the other side (drivers) the NEW King pin shakes/wiggles a small amount without the spindles!
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by Cape CodderI thought the below site could be of some value to anyone that was trying to get info on the Front Axle I haven't seen it before so here is the info.
http://www.motormayhem.net/model-a-f...pecifications/-
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10-21-2020, 09:42 PM -
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by MikeyWell finally getting parts out of the barn of my 31 roadster. Got looking at the front axle and it looks bent, put a string from end to end and she has a 3/8 to 7/16 pow to the rear. I'll start looking for someone with a press but till then, is there a spec on the bow top to bottom ? or anything else I should look for ? As always, thanks for any help. Mikey...
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by SupergnatThe driver side axle on my Phaeton has problems. I think a thread chaser might fix it. Any opinions would be appreciated....
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04-11-2020, 08:52 PM -
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Contained in Model A News (J/A 2007) and The Restorer (J/A 2018) were
articles on the restoration or strightening of the front axle.
Has anyone attempted these process and if so, could you please give me your opinion on them and any other advice on the process and which would be the best way to proceed.
Thanks.
Pluck-
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05-01-2019, 09:38 AM -
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by bob staehleThis is my first post. I saw a old video of Dan Hatch, from Alabama, repairing spindle/kingpin holes on a model T front axle. Would like to know
if he is still in business and if so how can I contact him? Thank you Bob.-
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03-29-2020, 11:25 AM -
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by dmdeatonI haven't taken my front wishbone loose from my axle yet, but have both extras laying loose. My question is about the assembly of these. The spring perch with its taper goes through the wishbone yoke and the axle. The taper nut locks the assembly from the bottom. I assume you torque this fairly tight, as there are no bushings, shims, or other material in between. Do you guys grease this as you assemble,...
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