My first mill ( Bridgeport series 1 clone with R8 tooling) 3" boring head used with a vertical tool holder ( S12S-SDUCR3 with dcmt 11t308 mt tt8125 insert. Boring a 3" hole x 3" long always makes a taper about 1-2 thou. My finish is great but on long boring jobs it make a small taper ??
Question is it my mill my tooling or me?
Question is it my mill my tooling or me?