Milling Delrin - Advice needed

[needleworks]

Start with similar speeds to Alu and go from there. With 2k rpm you will be very limited. With 16mm Id start around 500mm / min for a 10mm deep 1mm wide cut. Clear chips with air, delrin isnt difficult from what I recall.

Yeah, pretty much what Chaz has said, I also have a 2000rpm spindle and usually cut delrin using cutters from 4mm up to 12 mm. I normally cut around 6mm depth @ 600mm/min. I never use coolant, or air blast for that matter, if needed I just follow the cutter around with the nozzle from the hoover