Hey all,
Cant figure out a chatter issue and trying to get some help or even pointed in right direction for informational reference.
Our Machine: Multus U3000 Mill turn using Capto tooling.
Part: M64x6 internal thread. Oal length of 4.5" or so
Setup: Part held in bored jaws at about 3" deep. 1" steel internal laydown bar with minimum stickout held in Big Kaiser 3 set-screw bar holder.
Threads 3" deep.
Material: Some unusual X12CrMo (i believe) with Brinell hardness around 300. Does not like to break into chips.
Cut parameters: 325 sfm (around 500 rpm). Min DOC at .004 per side with starting D at .02".
Attempts tried to far: have went as low as 280rpm or 190sfm (seems to like higher rpm). Also tried Variable Spindle Speed Threading as a function of
machine. I've stayed away from a smaller min doc but maybe I should try that. Wanted to really "cut" this chip as opposed to rubbing.
Anyone see anything terribly off or have any input?
Thanks,
SML
Cant figure out a chatter issue and trying to get some help or even pointed in right direction for informational reference.
Our Machine: Multus U3000 Mill turn using Capto tooling.
Part: M64x6 internal thread. Oal length of 4.5" or so
Setup: Part held in bored jaws at about 3" deep. 1" steel internal laydown bar with minimum stickout held in Big Kaiser 3 set-screw bar holder.
Threads 3" deep.
Material: Some unusual X12CrMo (i believe) with Brinell hardness around 300. Does not like to break into chips.
Cut parameters: 325 sfm (around 500 rpm). Min DOC at .004 per side with starting D at .02".
Attempts tried to far: have went as low as 280rpm or 190sfm (seems to like higher rpm). Also tried Variable Spindle Speed Threading as a function of
machine. I've stayed away from a smaller min doc but maybe I should try that. Wanted to really "cut" this chip as opposed to rubbing.
Anyone see anything terribly off or have any input?
Thanks,
SML