Need Help!- Melting whilst drilling.

[Mattyvdv]

Hey everyone,

I am having trouble with plastic melting whenever i drill it using the "multicam" cnc router i have at work. i am relatively new to the cnc game and am confused about whats going on. basically whenever i drill any plastics and nylons it just gets way too hot and melts by the time i finish drilling and leaves terrible finished holes. also the tool seems to vibrate way too much, it doesnt matter if im using a 3mm or a 13mm drill i get the same results. being a multicamm i do not have the ability to slow the spindle head right down, it turns between 9000 and 18000 rpm from memory. and i can plunge from 100 to 5000mmpm.

plastics i most commonly use and are having trouble with are: Delrin - Nylon(lfx,pa99,6pla) - polyprop - hdpe

any tips or help would be greatly appreciated.

[Delw]

use coolant and or peck drill it

[ImanCarrot]

You might try a really sharp two fluted end mill instead of a drill- that might work?

[fatal-exception]

If you can't turn your speed down, try turning your feed up.

Can you mill the holes rather than just plunging?

Paul