Good day all. The lathe is a 1945 South Bend 9 in reasonable shape. The project is to builder a mounting plate to hold a milling attachment. The plan is to turn a cylinder to replace the angle feed. I purchased a blank about a foot long and 1.5 inch diameter. I placed it in a 3 jaw chuck and insured alignment with a dial indicator. I then carefully drilled centering alignment hole in the end and a live center placed in the tail stock. The work was solid and a dial indicator showed everything to be aligned.
Question:
Attempt to turn the work with a carbide tool resulted in very small chips and noticeable chattering. The finished work was quite rough. This was not close to the finish I was desiring so I took a new hss blank and ground a tool. I am really green at this, however in spite of that the hss tool worked much better. Turning created relatively long clean spring like cut offs. The finished surface was much cleaner. I was careful to make sure the tool was aligned in both cases.
Why would a carbide tool create rough chips while the hss create clean cut off material?
Question:
Attempt to turn the work with a carbide tool resulted in very small chips and noticeable chattering. The finished work was quite rough. This was not close to the finish I was desiring so I took a new hss blank and ground a tool. I am really green at this, however in spite of that the hss tool worked much better. Turning created relatively long clean spring like cut offs. The finished surface was much cleaner. I was careful to make sure the tool was aligned in both cases.
Why would a carbide tool create rough chips while the hss create clean cut off material?