rear axle shafts material

[firstboaz]

hi,
I'm from BGRacing, a team from Israel. in the last 4 years we used titanium for the rear axle shafts.
This year we're thinking on changing the material because of availability and budget issues.
I wanted to know which materials are recommended? and which you have experience with?

thanks

[jd74914]

Titanium-interesting. Why did you use that?

Typical axle materials are 300M or 4340.

[scotty young Taylor Race]

firstboaz

Over the last 18 years we have made our axles out of 4340 , And have switched in the last 4 years years to 4130 with an HRC 42-47

Scotty
Taylor Race Engineering

[StefStam]

Why dont you use carbon half shafts????????????????????

[mech5496]

Depends; no single right answer here as well. We have played with 4130, CK60, Aluminum and CF over the years. What are the performance indicators you are interested in? Weight, inertia, stiffness, cost, recyclability, bling factor?

[BillCobb]

Whatever you do, make the left and right side drive shafts different torsional stiffness, especially if your LSD is tight.

[MCoach]

Why dont you use carbon half shafts????????????????????

Do you? That would personally cause me too much concern to consider such a high risk, low pay off option...

Whatever you do, make the left and right side drive shafts different torsional stiffness, especially if your LSD is tight.

Really, I'd just prefer a spool and call it a day...

[StefStam]

Do you? That would personally cause me too much concern to consider such a high risk, low pay off option...

Well,if you do the right calculations and select the proper fiber orientation,why not

[FrederikWe]

Well,if you do the right calculations and select the proper fiber orientation,why not

How do you design the force transmission between the CF material and the connectors to the engine/wheel hub?

Probably the more interesting question over the ply layup... I don't see why CF should be the clear & obvious "best choice".

[StefStam]

How do you design the force transmission between the CF material and the connectors to the engine/wheel hub?

Probably the more interesting question over the ply layup... I don't see why CF should be the clear & obvious "best choice".

Thats the tricky part. I guess doing proper connection between CF and any steel/aluminium parts between those will probably eliminate those problems
Well i guess the transmission guys here calculated that each halfshaft must cope with 1270 Nm torque.... Textreme Carbon Fiber with 0/+45/-45/0 will be the proper orientation...even the company
recommends that lay up for torsional applications....... ex. halfshafts