So I'm running a tube of A519. OD of 5.500 and ID of 3.00
I am having issues with humming and chatter when boring. Boring from 3.00 to 3.480 and 7inch deep. Steel bore bar with negative rake insert cnmg432-tf ic8250.
Its currently set to run at DOC .120, 200sf and .010ipr. It hums loud and may chatter at times.
I've had it set to run at DOC .060, 470-520sf and .010-.012ipr. It came out with a shine and made no noise while cutting but didn't last long before serious chatter all the time and broke inserts like crazy.
Thoughts?