TomG Posted January 5, 2008 Share Posted January 5, 2008 Am after a bit of advice.. I have 24-spine (diff end) halfshafts in my front axle - not sure which ones these are as they were on it when i got it. The diff end spline is approx 1.24" in diameter but the shaft tapers down to 1.06" (10 spline shaft size?) in the middle section for most of the length of the shaft before going back upto size where it goes into the swivel. Is this normal? I thought 24-spline shafts would be 1.24" along the entire length, reducing the diameter seems intentionally weak, i'm surprised i haven't broken them yet.. (35"s, front ARB) Quote Link to comment Share on other sites More sharing options...
filthy boy Posted January 5, 2008 Share Posted January 5, 2008 Am after a bit of advice.. I have 24-spine (diff end) halfshafts in my front axle - not sure which ones these are as they were on it when i got it.The diff end spline is approx 1.24" in diameter but the shaft tapers down to 1.06" (10 spline shaft size?) in the middle section for most of the length of the shaft before going back upto size where it goes into the swivel. Is this normal? I thought 24-spline shafts would be 1.24" along the entire length, reducing the diameter seems intentionally weak, i'm surprised i haven't broken them yet.. (35"s, front ARB) Shafts should always be necked down at the end of the splined section. Removes stress risers and is the proper way too make them. Tim Quote Link to comment Share on other sites More sharing options...
TomG Posted January 5, 2008 Author Share Posted January 5, 2008 My Ashcroft 24spl rear one's aren't - well if they are it's a very slight taper and nowhere near as thin as 1.06" By stress risers do you mean this reduces the risk of it twisting or failing along the splined part? Quote Link to comment Share on other sites More sharing options...
ashtrans Posted January 5, 2008 Share Posted January 5, 2008 My Ashcroft 24spl rear one's aren't - well if they are it's a very slight taper and nowhere near as thin as 1.06"By stress risers do you mean this reduces the risk of it twisting or failing along the splined part? they are necked down Tom, not easy to see by eye as it is a slight taper and the ends of the taper are blended, as Tim says this is to stop stress concentrations which will encourage the shaft to flex along it's whole length, this is only one of many factors to take into account when designing shafts, some others are : material optimum diameters shape ( stress etc) heat treatment, balancing UTS vs elasticity making the splines, cut or rolled, effects grain flow 'crowning' the spines, again to reduce stresses Quote Link to comment Share on other sites More sharing options...
TomG Posted January 5, 2008 Author Share Posted January 5, 2008 Thanks, that's put my mind at rest a bit, I'll run them for now and see how it goes. Quote Link to comment Share on other sites More sharing options...
ashtrans Posted January 5, 2008 Share Posted January 5, 2008 Thanks, that's put my mind at rest a bit, I'll run them for now and see how it goes. They should be OK, we have sold about 800 rear shafts in the last 2 years and we have had back 3 or 4 broken, replaced under warranty FOC, Quote Link to comment Share on other sites More sharing options...
TomG Posted January 5, 2008 Author Share Posted January 5, 2008 Dave, bit of a misunderstanding i think, I've no worries about the Ashcroft rear shafts holding out. It's the (LR standard i think) front one's which look a bit thin and spindly sat next to them Quote Link to comment Share on other sites More sharing options...
Steve 90 Posted January 5, 2008 Share Posted January 5, 2008 They should be OK, we have sold about 800 rear shafts in the last 2 years and we have had back 3 or 4 broken, replaced under warranty FOC, I think i'm responsible for most of the broken one's (sorry Dave ) But it has to be said Ashcroft are an excellent firm to deal with. They stand by what they say, their products and services are first class and things arrive when they say they will. As for the STD 24 spline shafts i'm surprised you have not broken any running 35's, They usually go off where they are smaller diameter going into the CV. Do you have a front locker? When I was using STD shaft I would refuse to use the front locker to reverse out of places for fear of breakage! Quote Link to comment Share on other sites More sharing options...
ciderman Posted January 5, 2008 Share Posted January 5, 2008 I think i'm responsible for most of the broken one's (sorry Dave ) If theres something to be tested Steve , Your the man for the job . Quote Link to comment Share on other sites More sharing options...
Steve 90 Posted January 5, 2008 Share Posted January 5, 2008 If theres something to be tested Steve , Your the man for the job . Stop it Jason!!! Im really trying not to break stuff anymore . Ive been very restrained lately (specially compared to you) Quote Link to comment Share on other sites More sharing options...
ashtrans Posted January 6, 2008 Share Posted January 6, 2008 OK, see what you mean Tom, Steve are you now driving in those feather slippers I suggested rather than the usual lead boots ? Quote Link to comment Share on other sites More sharing options...
Steve 90 Posted January 8, 2008 Share Posted January 8, 2008 OK, see what you mean Tom,Steve are you now driving in those feather slippers I suggested rather than the usual lead boots ? Yep, Fluffy one's and a big heavy spring on the throttle to stop me pressing it too much! Quote Link to comment Share on other sites More sharing options...
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