Thread: 10 spline Vs 24 spline

the biggest problem when people start talking axles is they very rarely are comparing apples to apples.

10 spline and 24 spline are different spline types and profiles.... so they dont reflect much other than a title.

yes 10 are a smaller dia than 24. the main reason 24 spline are breaking before 10 is purely material used.

if you have 2 shafts exactly same design, exactly same material, exactly the same heat treating exactly same lenght but a difference in dia, ie a 30 spline and a 35 spline (same profile) the smaller one will be weaker. period!

so back to rover OEM axles, it appears that the 24 although larger dia are breaking sooner simply because of material used....

BUT!!!!!!!!!!!!

now here is the kicker, progressively loading a axle on a test rig is not the same as shock loading in real world. so a softer axle MAY out last a axle with a higher tensile stenght....

at the end of the day its a moot point. rover OEM axles are ****! if you are up grading to Hi-TOUGH Engineering, Jac Mac or Ashcroft go for 24 spline as its the biggest rover dia.

Serg

Thats right, the real differences are seen when comparing 10 and 24 spline rover axles made from the same material. The 24 spline axles are a lot stonger again.

The test was Landrover axles compared to landrover axles.

I am not attempting to make out that Landrover are either weak or strong.

It is just that some people suggest that Landrover 24 Spline axles are stronger than Landrover 10 spline. The tests posted indicate that there is 5/8ths of SFA difference between them.

I thought it was an interesting test and provides information about what is mostly discussed as opinions.

It would appear that it is a very touchy subject for some.

So basically, unless you're going to upgrade, then there's really not much between them.

The difference is probably going to be related to fatigue. As I understood it, the fatigue rating on a 10 spline almost guarantees it to fail during the life of the vehicle. Not so with the 24 spline.

Interetingly, I suspect the 24/32 front axle will be an anomoly, where the larger diameter axle will concentrate the stress into the bottom of the 32 spline CV end rather than letting the axle flex like what the 10 spline will. I dont know this though.

Originally Posted by r.over

The test was Landrover axles compared to landrover axles.

The mistake you are making is assuming that Land Rover used the same materials over the years.

a 24 spline axle is at least 33% stronger than a 10 spline axle - if exactly the same materials are used for both and all other things are equal. That is undisputable fact.

i think i hear an echo


Serg

Originally Posted by isuzurover

The mistake you are making is assuming that Land Rover used the same materials over the years.
.......

This is certainly the case. And it is not just the material. Fine details of finish make a big difference in life of cyclic loaded parts like axles, with, for example, the radius of corners and the surface finish having a big influence on the inception of fatigue cracks, which do not have to progress far before they become failure points in this application.

My impression is that in the late sixties, for example, Rover axles markedly deteriorated (possibly after the Leyland merger, I'm guessing), and while this may have been due to material or heat treatment it is just as likely to be a change in finish, probably an unintended and unforecast result of a change of contractor.

John