"Gunner" wrote in message
...
On Tue, 23 Aug 2005 11:12:15 -0700, "Harold and Susan Vordos"
wrote:


"Grant Erwin" wrote in message
...
By the way, this was one of the few times I used a drill chuck to hold
all
the
tooling. Wiggler, big end mill (to counterbore the diamond pattern to
allow
washers to lay flat), drill bit or little end mill, then maybe
countersink.
Repeat. Only worked because it was straight plunging on very soft
aluminum. Lots
of guys imply you go straight to hell if you do something as dumb as
holding an
end mill in a drill chuck. Well, I did it, it was fast, and worked
perfectly.
Would I do it a lot? No way. - GWE

It wasn't uncommon for me to use that very procedure when building
tooling,
but it was always in a mill, never a drill press. That alone makes a
huge
difference, primarily in rigidity. I agree, it works fine, but it's
easy
to get in trouble, especially with end mills. My only advice is to work
carefully when using them in drill chucks. They'll never run as well as
they do in a collet, but as you've found, they work well enough for spot
facing. It's a different story if you try machining sideways with them.

Harold


They will work not badly if cutting sideways also. But not with an
un-drawbarred morse taper.

Gunner

"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.

Think of it as having your older brother knock the **** out of you
for torturing the cat." Gunner

They cut fine, but the minimal support they have from three jaws tends to
allow them to hook easily. The additional length of the chuck and the
small (chuck) shank doesn't help the cause, either. It's not a good policy
to hold end mills in chucks, regardless of how rigid the machine is, or what
material one is machining. Still, many of us have, and will, do it and
manage to live through it. Still, I never recommend it to anyone.

Harold