Front Combo Stubs

[Jet109]

Hi Guy's

About to machine up some front Combo Style Stubs, and would like to know what material you guys are running and if you treat them?
Induction Harden En26 or just 4140 etc?

What do you think?

Thanks for the reply's

Jet

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[atomicjoe23]

I'm currently nearly 100% VW illiterate (soon to change, there should be a '69 Meyer's Manx in our garage next Sunday) so could you post up a picture of what you are machining?

Is it the comb spindle stub for the front end or is a combo stub for the rear end?

[Jet109]

Hi Mate, Thanks for the Reply, Here is a picture of the assembly, its the front upright. the stub the hub runs on. Cheers!

[DBMETALWORX]

Hi Mate, Thanks for the Reply, Here is a picture of the assembly, its the front upright. the stub the hub runs on. Cheers!

I have a pair of spindles exactly like that, sitting on the shelf with CNC hubs on them. If you're interested PM me.

[atomicjoe23]

I haven't had a chance to check out the spec's on EN46 but 4140 will work just fine.

[Jet109]

Thanks mate do you think it needs any treatment? Have bent some before so don't want to be doing it again.

[atomicjoe23]

Heat treatment would definitely be better. . .but I don't know what your set-up is so I'm not sure what your capabilities are.

[randy68]

4130/4340 H.T. to 38/42 Rc would be my
reccomendation.

[Jet109]

Was considering either Induction harden or Thru Harden.

What do you think?

[atomicjoe23]

Was considering either Induction harden or Thru Harden.

What do you think?

I'm assuming you mean surface induction hardening since you can through induction harden as well. . .I have no induction hardening experience, I only have experience through hardening and case-hardening with an electric heat treat oven, propane forge, and coal forge. Case hardening is a surface hardening heat treatment, but in the applications I have used it the depth of heat treat was not very critical. . .

. . .in this situation the depth of hardening would be important, too shallow and there is the potential to remove the hardened zone when the part is ground (assuming it will be ground after heat treat & quench) too deep and you may defeat the purpose of only surface hardening the part.

So the question is, do you know how deep you should harden the material if you surface induction harden the part? or does the heat treater's facility you are going to use have experience with these types of parts and can help you choose the correct depth of hardening? If the answer to either of these questions is no, then you should probably just stick with through hardening.