Milling h-11

[Platinum]

Does anyone have any good experience milling h-11 40Rc. I have been milling 50Rc h-13 for months with no problems, but this h-11 is a real I am running the h-13 cutters at the same rpm's and half the feedrate and not having much luck. Come out and speak up experts. Thanks in advance for any help

 

 

When in doubt just close your eyes and do it anyway.

[elbro]

If you are burning up inserts or end mills you want to drop the speed and keep the chip load the same.

[Keithm]

Why did you cut the feed by half. If any thing I would try to increse the feed fate from what the h-13 feed.

[Quickmike]

How does the tool fail? Is it getting dull or chipping?

[mold100]

Last week I made same changes to a die cast die that was X38 V05 which is a German cross ref of H-11 the Cr Mo content I believe is higher than H-13 and generall not heat treated as hard (h-13 I typically cut is 52-54) this was 48 rc.I did not need to drill so cant help with that.It was actually a wide open surfacing change with quite a bit of steel removal in the cavity - heres what I ran. rough 1/2 ball 9500 rpms 105 ipm .03 depth of cut .1 step over, 3/8 ball 11,000 rpms 105 ipm z level finish - 6mm ball 18,500 112 ipm same path and some ribs with a 3mm ball 26,000 54ipm(had to cut that one back a little) Its the same I would have ran H-13 at with a little more wear

but nothing concerning. I probably would kick the feed up and spindle speed down if I had considerable problems with tool wear. Ran garr TiAln coted 3 flutes and 6mm and 3 mm were garr Balnits.

[Platinum]

Thank you guys. The reason I was Having such major probs was I wasn't cutting the h-11 in the same machine as the H-13. It came open and all probs have went away. Thanks for being so specific mold 100. THIS FORUM IS AWESOME!!!!