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I was reading this other thread
It talks about u-joints and using 300M steel alloy.

I was thinking, why not make a birfield out of this material?

Is the cost prohibitive? Is the material too hard to work/machine?

This was just a thought, but I would like to know if it's possible. Maybe Jess at High Angle or Marlin could do one. BTW, what are Marfields/Newfields made of?
 

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Considering the cost of those 300M u-joints is $275/ea mostly due to high machining costs, I'd hate to think how much a 300M Birf would cost! <IMG SRC="smilies/eek.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
 

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I was thinking, why not make a birfield out of this material?
Cost prohibitive like you couldn't even IMAGINE! Just starting with the billet would be closing quickly in on a grand (for one Birf!) then you'd need to spec the time with a cutting machine... a VERY specialized cutter, with probably new tooling to work the 300M. Frankly, dunno what tooling you'd use to spline the stuff... maybe wire-EDM?

Keep in mind that the Marfield/Newfields are new, built from scratch and tooled as would be required (except, as noted, more time to work the 300M and more exotic tooling). So take the Marfield/Newfield prices, and add a multiplier for more costly base stock... then add another multiplier for the increased tooling time and cost of improved tools... then add an even bigger multiplier for the reduced volume being made (not many people would be able to afford these).

The price on these would kill you... way over a grand apiece by my back-of-the-envelope calculations. <IMG SRC="smilies/eek.gif" border="0">

Randii
 

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Originally posted by randii:
<STRONG>I was thinking, why not make a birfield out of this material?
Cost prohibitive like you couldn't even IMAGINE! Just starting with the billet would be closing quickly in on a grand (for one Birf!) then you'd need to spec the time with a cutting machine... a VERY specialized cutter, with probably new tooling to work the 300M. Frankly, dunno what tooling you'd use to spline the stuff... maybe wire-EDM?

Keep in mind that the Marfield/Newfields are new, built from scratch and tooled as would be required (except, as noted, more time to work the 300M and more exotic tooling). So take the Marfield/Newfield prices, and add a multiplier for more costly base stock... then add another multiplier for the increased tooling time and cost of improved tools... then add an even bigger multiplier for the reduced volume being made (not many people would be able to afford these).

The price on these would kill you... way over a grand apiece by my back-of-the-envelope calculations. <IMG SRC="smilies/eek.gif" border="0">

Randii</STRONG>
My A$$ is sore just from reading that!!
 

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Again, much too much $$$ just to retain the Toy axle, IMHO. <IMG SRC="smilies/eek.gif" border="0">
 

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O.K. Lets say you've got totally overkill, bombproof Birfield joints. What the next weakest link? My guess would be the pinion gear. Especially on 5.29s. So we start carrying spare 3rd members?
<IMG SRC="smilies/usa.gif" border="0">
 

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Originally posted by zags:
<STRONG>O.K. Lets say you've got totally overkill, bombproof Birfield joints. What the next weakest link? My guess would be the pinion gear. Especially on 5.29s. So we start carrying spare 3rd members?
<IMG SRC="smilies/usa.gif" border="0"></STRONG>
Yes, or stop wheeling and drive home with 2WD. <IMG SRC="smilies/rolleyes.gif" border="0">
 

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i think it would still be cheaper to just do the d60 conversion on the toyota axel!

just my $.02 <IMG SRC="smilies/biggrin.gif" border="0">
 

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Originally posted by dangerber:
<STRONG>Yes, or stop wheeling and drive home with 2WD. <IMG SRC="smilies/rolleyes.gif" border="0"></STRONG>
Sorry, thats not an option! <IMG SRC="smilies/biggrin.gif" border="0">

[ 10-04-2001: Message edited by: zags ]
 

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correct me if I'm wrong, but wouldn't the weak link still be the inner cage on the birf? You would still break these and eventualy destroy the joint?
 

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Originally posted by zags:
<STRONG>O.K. Lets say you've got totally overkill, bombproof Birfield joints. What the next weakest link? My guess would be the pinion gear. Especially on 5.29s. So we start carrying spare 3rd members?
<IMG SRC="smilies/usa.gif" border="0"></STRONG>
nope it would be the 3o spline inner axle. i have dana 60 joints on my toy center section and i have broken 4 axles with no locker or ring and pinion damage. my next step is go to crmo axles and then it should make the outer axle the week link. exactly where i want it.

as far as a 300m birfield. run the newfield with a 300m cage and i belive that would be at least as strong as a stock 44 joint.
 

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Originally posted by zags:
<STRONG>O.K. Lets say you've got totally overkill, bombproof Birfield joints. What the next weakest link? My guess would be the pinion gear. Especially on 5.29s. So we start carrying spare 3rd members?
<IMG SRC="smilies/usa.gif" border="0"></STRONG>

Assuming you made an unbrakable birfield, the weak spot becomes the inner axle. The inner axles come out of the diff as a 30 spline shaft but when the axle goes into the Birfield it necks way down. I have seen a few of these stock inner axles snap when used with heavy duty birfields. When Marlin was testing his first hand-made Birfields he found the axles would fail when tested with no angle on the joint.
 

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Originally posted by camo:
<STRONG>
run the newfield with a 300m cage and i belive that would be at least as strong as a stock 44 joint.</STRONG>
Now this man is thinking! <IMG SRC="smilies/beer.gif" border="0"> Replace the weak with the strong. Of course the other limitation of the Toy front is the 55" width.
 
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