Mark Mandell - Gone Round In New Jersey
Got an email about using Hunter cutters on a boring bar so thought I'd post them here.
First is the straight holder
With the straight shaft you can vary the attack angle of the cutter by rotating it in the bar to go from a hogging to a shearing cut.
Second is the bent holder
This cuts beautifully through the transition of a deep bowl and is very controlled for end-grain hollowing using a pull stroke up the sidewalls.
The holders are milled from 1/2" O-1 rod . Since I didn't have a chamfered end mill, each piece took two cuts with a 1/2" mill; one for the step and one with the stock canted 10° to approximate the bevel on the cutter. This left a slight gully in the seat step which I filled with some lead foil. The lead took all the vibration out of the cutter.