ToolmakerTH
Plastic
- Joined
- Jul 19, 2022
I use Haimer coaxial indicator in the chuck and sweep the drill tip but i guess you can use a test indicator as well. If you haven't got your X offset for your boring bar/drill holder yet, sweep the holder bore first. Once you have your holder indicated and enter your X offset, insert the drill in the holder with the cutting edge at the tip parallel with the set screws on the holder (the set screws which you use to clamp on the sleeve or the collet chuck). Then, bring the drill to X0 and sweep the cutting edges. Read the highest point on each cutting edge and adjust the alignment with set screws on the holder. Once the drill is aligned, I can drill to size within 10um easily with a carbide drill and the tool life is much much better than a drill which isn't indicated.