Hawke - broken rear drive shaft.

I broke a drive shaft on my 50 year old Hawke Formula Ford today. What would be a specification of steel that should be used in a new shaft?

Give Hardi spicer in Moorebank a call Monday, they will sort you out. They have upgraded, straightened and balanced many drive shafts for me over the years.I would lose the Chrome.

https://www.hardyspicer.com.au/?gcli...SAAEgIkU_D_BwE

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Originally Posted by Hawke

I broke a drive shaft on my 50 year old Hawke Formula Ford today. What would be a specification of steel that should be used in a new shaft?

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Originally Posted by Raleigh

...I would lose the Chrome....

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Good comment - chroming can make steel brittle and reduce its fatigue resistance.

any time you electroplate a stressed race car part it should go through a hydrogen bake-out. If you specify mil-spec plating it's part of the process.

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Originally Posted by Rick Kirchner

any time you electroplate a stressed race car part it should go through a hydrogen bake-out. If you specify mil-spec plating it's part of the process.

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It’s not going to be plated this time. In this part of the world, nearly all platers have gone, and those who are left aren’t interested in one off jobs.

CDS (Cold Drawn Steel) is what you need. Hawke had a different way with the donut tripod thingy where they bored out the flange for the tube. Lotus etc machined down a stub to insert inside the driveshaft. They done the same on the Elan half shafts.

https://www.instagram.com/p/BujkB4tFQxc/

That's how I've made mine in the past.

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Originally Posted by Raleigh

Give Hardi spicer in Moorebank a call Monday, they will sort you out. They have upgraded, straightened and balanced many drive shafts for me over the years.I would lose the Chrome.

https://www.hardyspicer.com.au/?gcli...SAAEgIkU_D_BwE

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Sadly, Hardi Spicer could not supply the three pronged end. Said they were no longer available. However, a nice man at Bankstown has them on the shelf, and will make them next week.

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Originally Posted by kevskisps

CDS (Cold Drawn Steel) is what you need. Hawke had a different way with the donut tripod thingy where they bored out the flange for the tube. Lotus etc machined down a stub to insert inside the driveshaft. They done the same on the Elan half shafts.

https://www.instagram.com/p/BujkB4tFQxc/

That's how I've made mine in the past.

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Thanks for that. I have found someone to make them for me. I could do it myself, but I'm running out of time.

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Originally Posted by Hawke

Sadly, Hardi Spicer could not supply the three pronged end. Said they were no longer available. However, a nice man at Bankstown has them on the shelf, and will make them next week.

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2nd hand Lotus Elan half shafts are a good source for these. Loads about when owners convert their Elans to CV joints

Driveline Services Brunker. Road?



QUOTE=Hawke;651441]Sadly, Hardi Spicer could not supply the three pronged end. Said they were no longer available. However, a nice man at Bankstown has them on the shelf, and will make them next week.[/QUOTE]

You can nickel plate this with no ill-effects, if you are after a clean and shiny look. You'll need to autosol them once in a while...

cheers,
bt