I just made my own lathe toolholder for indexable carbide inserts out of a perfectly sized piece of aluminum I had lying around. I matched the height of the cutter to a regular toolholder I have. I filed the recess for the carbide and drilled and tapped the 4-40 hole for the screw that secures the carbide. I copied the rough dimensions off of some other tools I have seen and a carbide tooholder for a Amaco brake lathe. My main question is what is the acceptable overhang of the carbide over the toolholder. I know the carbide is brittle, and as I was generously given the carbide inserts I really don't want to break them. The current overhang is about 3/32" of an inch, but the one I was copying from had less than 1/16" The brake lathe is designed for ultimate rigidity, and I don't need quite that much accuracy, but I don't want to be snapping carbides either. Thanks, Woodworker88 and the Los Altos High School Robotics Team #114
- posted
18 years ago