Hot Rods Cast VS Forged axle in an A

The regular price works out to ±ZAR5150: not all that much as these things go.

 

Makes me curious as to what the tolerances were in 1928? I mean, there weren't torque specifications on engine main caps, they were fitted with castle nuts and cotter pins lol. I guess if you're building a 6 figure street rod, then you would be into exact perfection, but being a traditional hot rod man, I'd take the torch to it and make it good enough. Hell the majority of people on the hamb don't even drive their car! What does it matter what axle is in it lol

 

Highly entertaining! but from a safe distance.

 

It’s got nothing to do with a “….6 figure street rod….”, if you think .200 is a tolerance you must be in some alternate universe.

 

OK thanks

 

Or he worked for any of the major US automakers during the malaise years.

 

Sounds like a potential lack of effort on your part, Sir.

Try harder. You have plenty of running room.

 

My point is that over all of these years you're telling me that when these cars hit something and they took a torch to the axle to straighten it, it was perfect? It's obvious that you're the best builder on here, seeing as the majority of the members here just tinker or spend their time on a computer talking about building a car that will never see the road. Perfection is the enemy of completion. I build my **** to enjoy, not be judged for a $20 trophy, and a speedway axle is more than adequate for the junk i build. Your turn to ****er punch me again.

 

I will keep you posted, Lloyd.

I ordered one. It should be here on Friday.

As for the comment about working for a major automaker in the malaise years, that was not a dig on you, but the automakers.

GM would allow 1/4", or 0.250" error in the length of a ch***is in the late 1970's. That is 0.05" past where these Speedway axles are (or less, maybe). I have seen F-body subframes with most of the welds not even meeting the other surface, on one whole side!

 

Sorry that I misunderstood you

 

No worries. I was not clear enough. That's on me.

For reference, the that tolerance is now 4.5mm, which rounds to 0.177", or just 0.023" away from that Speedway axle.

My spark plugs are gapped at nearly twice the delta between 0.2", and 0.177".

 

I too have seen that phenomenon with F body subframes. And I have also ran my hot rods up and down the road like a maniac with worn out king pin bushings that I'm sure were pushing the limit towards stupidity, but to me that's hot rodding.

 

If I understand the Speedway wording on the .2, is it just that one wheel sits out further than the other?
Maybe someone can explain it to me.

 

I will, as soon as I get the axle.

 

Yeah, I want to see the explanation on this, too. I wonder if the hole could be drilled the next oversize and make both equal? Also wondering if it would really make a difference as long as the axle was squared to the ch***is, other than maybe a slightly longer or shorter hairpin or bone on one side.

I’ve never set up a front axle, so I’m asking from my ignorance of what is proper.
A 1/4” sounds like a lot, but you can’t see both sides at the same time.

 

I believe they are saying that either the perch holes or the king pin holes are shifted off the centerline of the axle .200.

What I don't understand is how does a 1/4" tolerance on the OAL of a frame relate to holes that are shifted .200 off the centerline of an axle that might be 1 1/2" thick?

 

The perches do not go pierce the web.

There is a forged-in boss there that is thicker than the flanges of the axle are wide:



It is full round, or very close to it.

There is more metal in the forging there than there is in an original:


You implied that a tolerance of 0.200" is unacceptable. I was merely pointing out that some (many) OEM's have had tolerances that were wider than that, and sometimes WAY wider.

 

The ones with the extra large perch bosses are a terrible repro to my eyes…

Why risk it?? Go with a dropped OG from some of the suppliers mentioned on here.

here’s mine going under my 30 A Coupe from Joe.

 

Because my customer does not care, and would rather spend his money on his kid.

 

The Speedway axle that I ordered is out for delivery.

I will try to get it into CMM over the weekend. I will post the results.

 

One was Ordered here on east also , My relative
(10 hrs away from ) & I discussed & Took that axle is .200 longer on one side,witch should not be a issue, if turns out something different it will be addressed fixed.
My question is still on a No name unsure of the source
If drill test reliable for cast steel vs cast iron .
When I worked @ a machinist shop 30ish yrs ago
Tolerances within margin where + or - .030 unless Specified to exact tolerance/ size.
(intern)
20 year ago I purchased a set of rims from Weld racing , SFI 300 mph front , @ 700 each , I did a runout on rims , they where close to .045 out of True, contacted Weld , I was told if I remember correctly they allow to .060 out

 

This is being sold as a FORGED axle, not cast.

 

Yes aware of "speedway axle is advertised as forged" ,
Thread started Cast vs Forged ,
Asking about Drill test when unknown
If Cast or Forged to determine.

 

Steel v. Iron is a spark test. Bright orange/white sparks are from steel. Dull red ones are from Iron.

Cast v. forged is base on the appearance of the parting line. A wide parting line is a forging. A narrow one is a casting.

 

So you’re saying one wheel/tire sits out further by .2 on one side? I could live with that

 

Does cast steel have a thin parting line as well?

 

From just looking at it it looks like the perch boss hole and the kingpin hole are a little outward.

It looks workable.

I did not have time to take accurate measurements today.

 

I will also measure a bone stock Model A axle, and one dropped by Okie Joe.

 

Yes. The cast split line is the thin joint between the two halfs of the mould. Forgings have a much wider line because surpluss material has to extrude out the joint. This is sheared off at the end of the process.

 

Who wants to guess the rank of precision of the three example axles?

A. Original, unmodified Model A.
B. OEM, but dropped by Okie Joe.
C. Speedway, with the "advertised defect".

Ok, go!