I finally finished my carbide insert toolholder and tried it out. I
went't very slowly, with minimal toolholder overhang, in a 3/4" billet
of aluminum. There was no chatter or vibration, so I took a moderate
cut. It worked very well for both turning and facing, with a very
smooth finish even with higher than normal carriage feeds. The
toolholder is very simple, consisting of a bar of 6061-T6 to fit the
lathe toolpost, with a section on the end filed down to hold the insert
at the correctt angle. It is drilled and tapped for the 4-40 screw
that holds the insert (included with the insert). I built the entire
thing with hand tools and draw-filed all the surfaces smooth and flat.
I could feel no vibration at the end of the toolholder during use, so I
believe this is a solid tool. My next project is to make a carbide
insert boring bar/inside turning tool for the same kind of inserts.
Let me know if you have any comments.
Los Altos High School "Eagle Strike" Robotics Team #114
16 years ago