David;
I used a knurled aluminum ring with a set screw to clamp to the lower part of the tap's shank. I then had a steel sleeve bored for a close fit to the shank to guide the tap & keep it in line with the hole. This was placed in a collet in the Bridgeport. Should have dis-connected that Servo, only problem I had.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra