Hi all
Wondering what spindle speed and feed rate people are using to mill hdpe. My top speed is 4600 rpm on my cnc'd mini mill and I have some hdpe parts to cut, I played around with it some last night but not happy with results. Any help would be great!!

Walt

whats hdpe?

Well it could be High Density PolyEthylene. :)
If it's poly then you can run max spindle rpm.
Adjust feedrate to where the cutting looks its best... just experiment with the value for a particular cut.

The main thing is to keep a blast of cool air blowing at the cutter. More is better.

Note:
If you don't keep the PE chips as cool as possible they will get too sticky and then it melts into a glob.
(Glob = technical term for "blob")

Suggestion:
Keep a ShopVac hose sucking up the chip stream helps keep the cutter visible -so you can see whats happening.

Good luck,
Pres