Flatness
Flatness
(OP)
Hey guys,
Does anyone know what kind of flatness I can achieve when having Nylon 101, Delrin, or Teflon machined? Is asking 0.05 asking too much? (need to know for each material if you have experience working with them).
Thanks,
Dale
Does anyone know what kind of flatness I can achieve when having Nylon 101, Delrin, or Teflon machined? Is asking 0.05 asking too much? (need to know for each material if you have experience working with them).
Thanks,
Dale





RE: Flatness
RE: Flatness
RE: Flatness
I should think 50 thou is quite achievable.
H
www.tynevalleyplastics.co.uk
RE: Flatness
Delrin I know, and the others I suspect, is notorious for for having lots of residual stress in stock blanks from the casting or whatever manufacturing process.
I tried to have a helix machined out of a 1 inch delrin rod once and wound up with an unusable corkscrew because of the stress release during machining.
So the answer I think is "it depends".
RE: Flatness
RE: Flatness
I would have thought aluminium would be cheaper than plastic.
Modern CNC stuff machines it pdq.
H
www.tynevalleyplastics.co.uk
RE: Flatness
RE: Flatness
I've had similar results as MintJulep. I had some face milling done on delrin and when it was unclamped from the table it was slightly warped (measured fairly uniform before but had a visible surface curve afterward).
RE: Flatness
RE: Flatness
Teflon will creep more than the other plastics, and this can be an issue if you don't handle/ship/store the product in a way to maintain the flatness.
Have to agree that a good cast and stress-relieved aluminum plate makes much better tooling than the plastics. Google Mic-6 I think it's called.