I was turning some 4.75" 4340HT today at .140DOC and .016"/rev with a CNMV 432 at 700SFM (560RPM), about 70% spindle load. All was fine for 15 parts, inserts lasted about 6 parts per edge.
Then I dropped the SFM to 500 (400RPM) and I thought I saw the spindle stall.
Weird.
So I tried again, and the insert blew up.
I figure I ran out of torque when I dropped the speed, so I want to check this out.
A 2" insert drill at 350sfm (660RPM) is about the 70% spindle load as well.
Does anyone know where to find a torque curve chart for a 96 SQT 15MS?
THanks!
Then I dropped the SFM to 500 (400RPM) and I thought I saw the spindle stall.
Weird.
So I tried again, and the insert blew up.
I figure I ran out of torque when I dropped the speed, so I want to check this out.
A 2" insert drill at 350sfm (660RPM) is about the 70% spindle load as well.
Does anyone know where to find a torque curve chart for a 96 SQT 15MS?
THanks!