I have a shop made cutter from O1 tool steel. It is a concave radius cutter for profiling the outside of gun parts. It has 4 straight flutes. I used it with my cnc to round over a lever and I had to go extremely slow to avoid chatter and burning it up. I believe my end result was about .010 WOC, 30 sfm, 120 rpm, and max about .5 ipm. I had to throttle feed down to about .1 ipm at the end of the lever as the cutter went around the small radius. With this WOC it took me about 5 passes to fully clean up the outside profile. I would have liked to run the tool slower at about 60 rpm but the mill did not have enough torque at this speed.
Independent of my specific tool what is the recommended SFM for an O1 cutter? I could not find any data online as most results are for using HSS or carbide to machine O1. I was using ~20-30 sfm at the recommendation of my mentor, who also made the cutter.
Here is a picture of what the setup and cutter look like.
Independent of my specific tool what is the recommended SFM for an O1 cutter? I could not find any data online as most results are for using HSS or carbide to machine O1. I was using ~20-30 sfm at the recommendation of my mentor, who also made the cutter.
Here is a picture of what the setup and cutter look like.