We have a Hardinge ST220 Swiss type CNC lathe. The main jobs we run on this machine is made from 11/16" Rd. 304 stainless steel. The parts are between 2.3" and 1.77" long. We drill .166 diameter 1.58" deep and .250 diameter 1.8" deep. T.I.R. runs from .002 to .008 with .005 being the maximum allowed. The other problems is that we cannot get the chip to break and it wraps around the part, so we have to stop the process and remove them before we transfer the part to the sub spindle. The DOC ranges from .094 to .224 turning at 250 SFM with .002T IPR needed to maintain finish and size requirements. Anyone have any experience with these machines
- posted
19 years ago