Aluminum or stainless for caliper piston>

[Big Block]

Need to get a caliper piston made up for my 750. Has anyone had one turned from aluminum? I was wondering if there would be any issues, other than that it will have to be stainless and I imagine that would take more time in the machine shop as it would be harder material. Chroming steel isn't an affordable option here.

[zed1015]

Aluminium pistons are usually hard anodised to resist corrosion etc so unless you get it anodised i'd go for stainless.
I do loads of stainless and isn't hard to machine.

[Big Block]

Thanks for the input, stainless it is.

[Nessism]

304 stainless is commonly available, and more resistant to corrosion than most other variants. Use carbide cutters, to avoid carbon steel machine tooling from imbedding particles into the part, which can subsequently corrode. In fact, after machining, you may want to soak the part in some acidic solution, to eat any imbedded particles away, denoted passivation.