- Joined
- Nov 23, 2014
- Messages
- 2,609
I just use a standard drill chuck -- just for the reason you pointed out, the the tap will slip when it meets the bottom of the hole, or when the resistance gets to much (taps are hard and wont mar like a drill bit). I do have variable speed and this is done very slow. At the first slip, I reverse and will usually try again and get a thread or two more, if needed then I finish the threads with conventional means by hand. (use lots of thread cutting oil!)
I have one of these. It works great. It also has a gizmo to hold dies.