On 2011-03-13, Karl Townsend wrote:
On Sat, 12 Mar 2011 23:03:37 -0600, Ignoramus25538
wrote:

My CNC mill does rigid tapping and it is great and easy to do -- just
one "one liner" like this

G33.1 Z[-0.5] K[1/24]

would rigid tap a 24 TPI thread from the current point to the depth -0.5.

Easy and powerful.

[ ... ]

What kind of tool holder should I use for this rigid tapping? Would
colleted tool holders help with this?

i
A drill chuck is a REAL POOR choice. Slips easy and isn't on center. I
normally use my TG100 collet holder and the right diameter collet.
Tighten up real good. Slipping is a BAD thing.

Note that there are special chucks from Albrecht which have
diamond grit faced chuck jaws -- but you would want that on a NMTB-30
mount, and to have the version which can be locked, or it will let go as
soon as you start to back the tap back out.

Enjoy,
DoN.

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