[lincpimp]

Good info Redshift.

Dad wanted to buy a inside grooving tool with removable cutting inserts. I figured I could make what I needed using some stock and the welder. I only need to cut a groove 1mm deep 4mm wide. I figured I could whip something up, basically like a chisel point that could be advanced very slowly into the material and it would cut a square shoulder on each side. Otherwise if the cutting surface is angled I would need 2 tools, and would have to make them quite narrow to allow them to track along the 4mm groove. Not sure if that makes sense, I will have to draw a diagram.