steering!

another

Hy-steer arm for the 70 I see. Looks strong enough.

Originally posted by 66CJdean
Hy-steer arm for the 70 I see. Looks strong enough.

yes Dean both arms are carved out of 6" x 24" x 1 1/2"
of 4140 chromoly

more

.

:eek: :eek: :flipoff2: :eek: :eek:

fukn nutty dude!!!! fukn nutty!!!


:beer: cheers

Good lord, have mercy... :eek: No wonder you're selling off your birfields. :eek: :eek: :eek: :eek:

Where's a good place to get chromoly like that? I haven't been able to find any in a small quantity at a reasonable price.

Originally posted by Drew Persson
Where's a good place to get chromoly like that? I haven't been able to find any in a small quantity at a reasonable price.

i got this 4140 at The Metal Warehouse in Union City. but they had to have it shipped up here form L.A.

Why is it that with so much home made or home machined stuff that nobody seems to care much about radius roots and smooth transitions?

Don't know? Don't care? Just seems odd to me with the time and effort and material selected to just ignore it.

I'm not critisizing, just trying to learn why you do what you do...

besides...you said you were showing off:flipoff2:

Originally posted by BillaVista
Why is it that with so much home made or home machined stuff that nobody seems to care much about radius roots and smooth transitions?

Don't know? Don't care? Just seems odd to me with the time and effort and material selected to just ignore it.

I'm not critisizing, just trying to learn why you do what you do...

besides...you said you were showing off:flipoff2:

Probably because the weak point on those mother of all arms is going to be one of these.
a) The TRE/Rodends.
b) The studs holding the arms to the knuckle.
c) The tierod and/or the crossover arm.

Even if he went with hydro steer with the ram mounted to the axle, and directly connected to the arm, the failure mode would be (b) or (c) above, or the ram mounts on the axle.
Besides, all of the transitions on the arms are in the opposite plane that the majority of the forces that the steering will generate.

How much did it run, if you don't mind me asking? Best I've found is about $50 per foot of 1.5"x4" flat bar.

Originally posted by mossberg


i got this 4140 at The Metal Warehouse in Union City. but they had to have it shipped up here form L.A.

$160 for a piece 1 1/2" x 6" x 24"

Probably because the weak point on those mother of all arms is going to be one of these.

Yes, I understand what you're saying there - the weak point in terms of where it will fail due to a sudden one time overload.

But my question relates more to stress and fatigue. Doesn;t matter where the weakest point is (in a one time sense) parts are still going to experience fatigue - everything does.

Maybe nobody else thinks fatigue life will ever be an issue - but I like to worry myself about it ;)

Originally posted by BillaVista



But my question relates more to stress and fatigue. Doesn;t matter where the weakest point is (in a one time sense) parts are still going to experience fatigue - everything does.



The stress/fatigue that you are talking about is still going to affect parts at their weakest point. There will be negligble forces on those arms in the x axis, and that is where the transition on the arms are most likely to cause cyclical failure. The reduction in cross-sectional area is not sufficent to justify your worries Bill. These are made out of 4140 with a tensile ksi. of 120, not the cast steel of regular arms( approx tensile strength of 40 ksi. ) Some of your worries seem to be more A&P related. Due to the fact that weight is not a critical factor, smooth radiuses and transitions are not as such a critical factor as in an A&P application where the lack of such would be cause for worry.

i dont think these will ever break the rod ends will give before these arms do, even the knuckle would break first. and there is a 2" bend in these arms that you really cant see in the pics, each arm curves inward 2" to clear the tires thus making the tie rod 4" shorter, and the shorter the tierod the stronger the tierod, right?





Originally posted by BillaVista
Why is it that with so much home made or home machined stuff that nobody seems to care much about radius roots and smooth transitions?

Don't know? Don't care? Just seems odd to me with the time and effort and material selected to just ignore it.

I'm not critisizing, just trying to learn why you do what you do...

besides...you said you were showing off:flipoff2:

Originally posted by jasonmt


The stress/fatigue that you are talking about is still going to affect parts at their weakest point. There will be negligble forces on those arms in the x axis, and that is where the transition on the arms are most likely to cause cyclical failure. The reduction in cross-sectional area is not sufficent to justify your worries Bill. These are made out of 4140 with a tensile ksi. of 120, not the cast steel of regular arms( approx tensile strength of 40 ksi. ) Some of your worries seem to be more A&P related. Due to the fact that weight is not a critical factor, smooth radiuses and transitions are not as such a critical factor as in an A&P application where the lack of such would be cause for worry.

you took the words right out of my mouth!;)

4140

4" shorter tie rod
holy negative ackerman batman

Just wondering, are you going to heat treat those arms? Or would that be a bad thing?