Hey everyone.
I'm machining 420SS on my 1994 mazak qt15n. The part OD is 1.5" and groove OD is 1.257" (+-.001). The groove is about .8" in front of my jaws.
The groove is measuring 1.256 one way and 1.258 measuring 90 degrees from the previous.
I'm using a kennametal top notch NG3189-K 5010 tool. The groove width is .189", so I'm going full width and depth no peck. I'm running 500 sfm at .008" feed/rev. Reducing to .006" feed/rev didn't seem to help. I'm using those feeds and speeds because the finish is good with no chatter.
Every once in a while it seems like i get a part that is within .001" round. I'm not sure where to go from here.
Any thoughts?
-Tyler
I'm machining 420SS on my 1994 mazak qt15n. The part OD is 1.5" and groove OD is 1.257" (+-.001). The groove is about .8" in front of my jaws.
The groove is measuring 1.256 one way and 1.258 measuring 90 degrees from the previous.
I'm using a kennametal top notch NG3189-K 5010 tool. The groove width is .189", so I'm going full width and depth no peck. I'm running 500 sfm at .008" feed/rev. Reducing to .006" feed/rev didn't seem to help. I'm using those feeds and speeds because the finish is good with no chatter.
Every once in a while it seems like i get a part that is within .001" round. I'm not sure where to go from here.
Any thoughts?
-Tyler