Mud-club
Vehicle & Technical => Discovery => Topic started by: dazzawhipple on May 18, 2006, 12:17:08
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Which is better?????????
Darren
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I'm sure this has been discussed before - might be worth doing a bit of a search.
General opinion is that 24-spline is stronger, although I think that some of this is due to the fact that the 10 spline stuff is getting quite old now and therefore will have seen more use.
I use largely standard late low mileage (or new)24 spline stuff in the racer wherever possible and have thankfully been reasonably free of problems so far!
H
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ive had both never smashed 10 spline but have 1 diff and 2 half shafts both 24
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ive had both never smashed 10 spline but have 1 diff and 2 half shafts both 24
Yeah but your right foot has lead in it :lol: :lol: :lol: :lol:
i would always choose 24 as basic mathmatics says the more metal to metal contact the stronger they should be!!
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ive had both never smashed 10 spline but have 1 diff and 2 half shafts both 24
Yeah but your right foot has lead in it :lol: :lol: :lol: :lol:
i would always choose 24 as basic mathmatics says the more metal to metal contact the stronger they should be!!
but the shear strength on a ten tooth should be stronger
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It's down to the fact that 10 spline half shafts have a stress-raiser at the root of the splines which begins to crack under extreme stress, 24 splines have much smaller shoulders (and more of them) so the stress is lowered. Add to that 10 splines are square splines, 24 are tapered.
If you can get the heat treated Ashcrofts half shafts, they are good enough. Otherwise go with 10 splines and chuckle at how cheap spare parts are. I've never bust one but I don't drive competitively and I don't spin wheels off-road.
24 splines are staring to get worn now and showing the weakness inherant in the design, wear reduces the contact face on a tapered spline and eventually they jump. Once it's happened both diff and half shafts are toast. Wear in a 10 spline is evident but not a problem.
Given how much 24 spline diffs cost on E-Blag (and you can't give away a good 10 spline diff) I'd have to factor that in too, but you pays your money........
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Come on RRB, you know you CAN give 10 spline shafts away....hehehe
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10 spline stuff cos ive got laods o them :lol:
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but the shear strength on a ten tooth should be stronger
Not necessarily - it's down to the sum of the root areas at the base of splines. This is where the shear loads act. I've not actually measured these components so can't really confirm.
Point is, a large number of smaller splines can often have a much greater root area than a smaller number of larger splines . . . . it's all about engineering and mathematics and optimisation of component sizes and also the selection of materials.
I'd agree with RRB that the 'profile' of the 24 spline is better engineered in terms of reduced stress points and fatigue strength but in the longer term they may still actually fail by other means, i'e slipping due to 'worn' contact surfaces on the spline, rather than breaking at the root of the spline. . . . . which apparently was the reason for the change in the first place.
To be perfectly realistic and honest, the design is fundamentally not up to the job, any old Land Rover owner will tell you, they break shafts . . . and always have done . . . . . hence the reason many change to Ashcroft gear if they use the machine hard.
It's all Swings and roundabout's and associated manufacturing costs i'm afriad . . . . . and the argument for and against will no doubt carry on forever.