I have a question regarding helical lead ins.
I am using a 3 flute high helix aluminum specific end mill from maritool.
Material is 6061 al.
800sfm, about .005 ipt feed, dropped down to probably .002 ipt on the lead in.
As the cutter is ramping down to depth, there is an odd noise after I get down about .6 -.7" deep. Almost like a crackling.
Is this chips not being evacuated from the flutes?
Ramp angle is 2 degrees. I emailed frank mari today and he suggested 3-4 degrees ramp angle.
Will ramping too shallow cause problems?
I am using a trico micro-drop colant system.
After I get down to depth (.90), it cuts just fine with great surface finish.
Any suggestions?
Steve
I am using a 3 flute high helix aluminum specific end mill from maritool.
Material is 6061 al.
800sfm, about .005 ipt feed, dropped down to probably .002 ipt on the lead in.
As the cutter is ramping down to depth, there is an odd noise after I get down about .6 -.7" deep. Almost like a crackling.
Is this chips not being evacuated from the flutes?
Ramp angle is 2 degrees. I emailed frank mari today and he suggested 3-4 degrees ramp angle.
Will ramping too shallow cause problems?
I am using a trico micro-drop colant system.
After I get down to depth (.90), it cuts just fine with great surface finish.
Any suggestions?
Steve