07-20-2019, 09:53 AM
I had been in the machining trade for 43 years (now retired) if you use the proper speeds and feeds the heat will be in the chip and not the tool or the part being machined. So take the sfm and sit down and figure out the proper rpm and feed and you will be surprised as the heat will no longer be in the tool or part but be in the chip. And always keep the chips clear of the cutter as they are now harder than the part being machined and will dull your cutter. I have seen this so often in the shop the operator will slow down the feed and not the rpm to try and get a better finish only to heat up and dull his or her cutter. The get a better finish you don't change the rpm or feed but increase the corner radius on the cutter but with that you increase cutting pressure so you do need a solid setup and a solid spindle to handle the increase.