Info:
Material: .250 diameter 4140 round bar
Cutter: Data Flute CNC .250" BEM, 4 flute, 1/4" Shank, sticks out 2"
DOC: Two rough passes at .008 and one finish pass at .004
Machine: Makino G5i grinder/milling machine 12K spindle
I am cutting a profile into three .250 diameter annealed 4140 round bar that are pressed into a fixture, that are then held by a vise. I pre-align the part on the CMM and then post-aligned the part after machining and it didn't move... very rigid.
I went to Data Center's websited and tried cutting at 1525 RPM and 6.12IPM (100SFM and .001 chip load) and it produced an awful finish. I've never used a ball end mill before, but it seems like the numbers should be much higher since the overall material removed per pass is much less than a standard end mill. I've tried searching on Google and there doesn't seem to be too many resources specific to ball end mills. A coworker tells me to use between 60-80 IPM and approximately 6000RPM. That seems pretty fast to me. Thoughts?
Any suggestions as to what I should try? I have GWizard at home, but of course it's not here at work.
Material: .250 diameter 4140 round bar
Cutter: Data Flute CNC .250" BEM, 4 flute, 1/4" Shank, sticks out 2"
DOC: Two rough passes at .008 and one finish pass at .004
Machine: Makino G5i grinder/milling machine 12K spindle
I am cutting a profile into three .250 diameter annealed 4140 round bar that are pressed into a fixture, that are then held by a vise. I pre-align the part on the CMM and then post-aligned the part after machining and it didn't move... very rigid.
I went to Data Center's websited and tried cutting at 1525 RPM and 6.12IPM (100SFM and .001 chip load) and it produced an awful finish. I've never used a ball end mill before, but it seems like the numbers should be much higher since the overall material removed per pass is much less than a standard end mill. I've tried searching on Google and there doesn't seem to be too many resources specific to ball end mills. A coworker tells me to use between 60-80 IPM and approximately 6000RPM. That seems pretty fast to me. Thoughts?
Any suggestions as to what I should try? I have GWizard at home, but of course it's not here at work.