On Wed, 16 Nov 2011 10:52:00 -0500, tnik wrote:

On 11/16/2011 9:57 AM, wrote:
On Tue, 15 Nov 2011 17:16:48 -0800, "PrecisionmachinisT"
wrote:


wrote in message
...
I posted a while back that I might be buying a Fadal mill and running
it from a phase converter. Well, I'm buying it. I'll write the check
tomorrow. It's a model VMC-15 and has rigid tapping so I guess I'll
need that parameter changing info. Also, just what is the advantage of
rigid tapping over tapping heads?
Thanks,
Eric

The main advantage of having rigid tapping is that it allows you to use
standard drilling collets and chucks instead of having to buy a bunch of
additional specialty tooling that is only useful for tapping.

So all the compression/tension tap holders and collets I'm also buying
are not neded? I can just hold the taps in ER collets for example?

Eric


You can and we have before, especially when we didn't have a tap holder
in stock. But we have found out that it's much safer to use a rigid tap
holder. Least if its in a tap holder, you KNOW the tap isn't going to
spin. Plus we have a bunch of tap holders anyway for the machines we
have that don't have rigid tapping.

I use my TG100 collet holders for rigid tapping. Werks grate for 1/2
and down. I spun the tap with bad results on 5/8x11 in 4140.

Karl