Dave, you can see the weld penetration at the ring where it broke. All these fast cars just found the limits of this style axle and bearings. These cars are making a boat load of torque! I bet the other axle in that car will tell a better story.

quote:

Originally posted by markemark:

quote:

Originally posted by Big Steve:
J.

Isn’t there something about MW splines being different than Strange? Maybe need a different spool?

35 spline yes, 40 spline no they are the same. I switched to a MW spool from Strange last year

For those looking for a safer upgrade, but not wanting to dive into a floater, check out the Strange 2 piece axles

Just wondering has anyone ever converted a Mark Williams Modular rear from conventional axles to a floater. I am pretty sure the housing ends can be changed to do this along with obviously the brakes and everything else that goes with it. I am in this boat now. At very least I think Im going to put new 40 spline axles in mine as they have quite a few runs on them. but I am considering converting it depending on cost and if its worthwhile.

quote:

Originally posted by SST400:
For those looking for a safer upgrade, but not wanting to dive into a floater, check out the Strange 2 piece axles

Interisting, looks like they are gun drilled as well
https://www.strangeengineering...ange-brake-kit.html/

Strange does produce solid floater axles.
As per their site. Yes they also produce 40 spline (Non Drilled axles also).

Drag Race floater axle – 24″ or less
Machined from solid Hy-Tuf material
Solid axles have 9% more torsional strength than gun drilled axles.Really surprised axles this day and age aren't rolled spline. Unless i'm missing something.
Example.

https://www.strangeengineering...-24-or-less-ea.html/

This message has been edited. Last edited by: TD3550,

quote:

Originally posted by Curly1:
I am still not understanding why full floater is stronger. Looks like from here the brake caliper and wheel still bolt on to flange same as a flange type axle?
All of the torque from acceleration and stopping still goes through the flange of the axle correct?

It's not so much that they are stronger although the diameter of the axle is much larger, thus stronger, but it's a safety issue. If you break an axle in a floater the wheel doesn't launch itself from the car.
Although if you were to break a floater axle the car could still drive to one side.

Dave

Well I pulled the trigger on a pair of Mark Williams Ultra HI Torque axles, 300M Aerospace material, non gun drilled. This is the strongest possible axle I could get short of getting a whole new floater housing assembly.

With my current Strange axles being gun drilled and retainers welded I had no choice, at least I can sleep better now and be a little safer.

Just sucks someone had to tear up a car for everyone to get a reality check and learn something

quote:

Originally posted by Big Steve:
Well I pulled the trigger on a pair of Mark Williams Ultra HI Torque axles, 300M Aerospace material, non gun drilled. This is the strongest possible axle I could get short of getting a whole new floater housing assembly.

With my current Strange axles being gun drilled and retainers welded I had no choice, at least I can sleep better now and be a little safer.

Just sucks someone had to tear up a car for everyone to get a reality check and learn something

As an FYI, if you had a 2" diameter solid axle vs a 2" diameter axle with a 1" gun drill center you have only reduce the load capacity by less than 8% for the gun drilled axle!!!!! YES 8%!
A large percentage of torsional load is carried by the outer section of any circular section so filling the center does very little other than looking much stronger to the untrained eye. This is the kinda same reason steel floor beams in buildings are shaped like I's! The middle of this section does little to support the load even though this deal is in bending and not torsion.

The bottom line here is pretty simple, there is a reason full floating rears were designed and tires shake is a drivetrain parts KILLER!!!!!!

It's to easy to lay blame on the welded retaining rings when that was not the real issue! As far as anyone really knows here, the axle bearing could have failed first taking out the axle. Either way, that car should have had a floating rear going 3.80!

quote:

Originally posted by Big Steve:

Just sucks someone had to tear up a car for everyone to get a reality check and learn something

If does suck but when has it not been that way? Breakage always leads to better components and some unfortunate soul will always be the guide for everyone else.

Curtis

quote:

Originally posted by TOP38:
As an FYI, if you had a 2" diameter solid axle vs a 2" diameter axle with a 1" gun drill center you have only reduce the load capacity by less than 8% for the gun drilled axle!!!!! YES 8%!

Removing half the material and only reducing the strength by 8% seems like a decent trade, but is the weight savings worth weakening the axle by 8%?

I'm sure that is a user-specific question, but as a person in the market for axles for my bracket dragster, I'm genuinely curious if getting the drilled axles is a benefit. The cost is negligible, IMO.

Tire shake is killer and on my car Hoosiers shook like crazy and broke all kinds of stuff and my junk is not that fast.
I do think it is a good idea to get strong axles but a gun drilled axle is not much weaker than a solid one. Still if you feel more comfortable with solid then great.

Some of you are getting to the power to where you are pressing the limits.

FWIW, I'll be switching to a floater this off season.

I was on the fence all year thinking about whether to put just put new axles in or switch to a floater, with that little reality check last weekend it wasn't hard to make the decision.....

quote:

Originally posted by Lenny5160:

quote:

Originally posted by TOP38:
As an FYI, if you had a 2" diameter solid axle vs a 2" diameter axle with a 1" gun drill center you have only reduce the load capacity by less than 8% for the gun drilled axle!!!!! YES 8%!

Removing half the material and only reducing the strength by 8% seems like a decent trade, but is the weight savings worth weakening the axle by 8%?

I'm sure that is a user-specific question, but as a person in the market for axles for my bracket dragster, I'm genuinely curious if getting the drilled axles is a benefit. The cost is negligible, IMO.

I am certainly no mechanical / structural engineer but I would think that the type of metal would have an effect.

MW 4140 axles can be gun drilled a maximum of 7/8
The 300M axles can be gun drilled to 1 inch and have the same strength because the material is stronger.

So a solid 300M axle would have to be stronger than a solid 4140 axle I would think. How much I have no clue.
My car will run .100 or more under the new 6.10 index for TD so I cant see heavier axles making much difference in my ET so I went with solid. Just simply cannot afford that kind of coin for a floater right now.

Maybe NHRA will make a new rule in the future about requiring a floater. Not saying its right and I could be way wrong but I bet only 1 in 10 cars in TD have one right now.

I called moser today and they said my 40 splines are warrantied for 10 years against spline twist and he said my hp is no issue.ive got 10 years on these mosers going from 7.00 to 6.30 and there is no twist.so im going to stick with moser...I really feel there may have been an actual axle bearing failure on les car the more I look at the pictures.
on another note it appears Goethe industries is out of business.i have left voice mails,emails and facebook messages with no response trying to order a shaft.so im guessing he is not working anymore.

Got a brand new set of 40 spline Strange axles gun drilled and with lightened flanges today . The retainers are NOT welded to the axles . The gun drilled hole is plugged with a Welch plug so I can't check how deep the hole is on them . The Moser axles that I am replacing are gun drilled down to withhin a inch or more from the the bearing mounting surface . My bet is this axle that broke ain't quite factory .....

quote:

Originally posted by 68TSCAMARO:
Got a brand new set of 40 spline Strange axles gun drilled and with lightened flanges today . The retainers are NOT welded to the axles . The gun drilled hole is plugged with a Welch plug so I can't check how deep the hole is on them . The Moser axles that I am replacing are gun drilled down to withhin a inch or more from the the bearing mounting surface . My bet is this axle that broke ain't quite factory .....

I drilled a small hole in the plug on one of mine to see, put a coat hanger down and its gun drilled all the way thru. Mine were built in 2012 when my car was built, if Strange didnt weld them then Undercover did it since they build the car and assembled the rear end.

Travis at MW told me today that you have to drill all the way thru because you will leave a sharp edge where you stop which could cause a crack. They also hone all there gun drilled axles, I am sure Strange does the same to clean up any sharp edges in the bore after drilling.

if you have to drill all the way thru would the hole not come out thru the flange or does it on a MW ? I know on the Moser and Strange they are not drilled completely thru .

This message has been edited. Last edited by: 67TSCHEVY2,

quote:

Originally posted by stk 758 BP!:
Dave, you can see the weld penetration at the ring where it broke. All these fast cars just found the limits of this style axle and bearings. These cars are making a boat load of torque! I bet the other axle in that car will tell a better story.

I thought pointing that out would end most of the speculation about what broke....and why...

I ordered axles from Strange last month and after discussing it with them I seen no reason to take a virtually indestructible axle and reduce its strength 8% to save approximately 2lbs spinning at the center of the mass.
I'll just take a crap on race day and leave my axles as strong as possible.....

I see zoomies. Is this a blown 3.80 car with non floating rearend? I thought there was a rule about this.....maybe only in ProMod though. Either way why not run a floater on any car in the 3's?