Milling Tin or Pewter?

[John Bear Ross]

Anyone milled the not-so-tough non-ferrous metals such as tin or pewter? I'm looking to do tiny figurines and models on a 4-axis Taig Hybrid, and want to make vulcanizable masters to throw into spincasting machines. Does pewter mill well enough to show jewelry-quality detail (i.e. 1/100th scale humans), or will I end up with clogged tooling and smeared, tiny abominations?

Feed rates, RPMs, ball or end mill choices, lube or no lube, all would be appreciated.

Best,
John Bear Ross
Hellion Productions

[AMCTony]

If this was me doing this and I assume that you are using these to make molds then I would use free machining grades of brass for the master. This should give good results. I think that tin may be too brittle.