"Pete C." wrote in message
. com...

PrecisionmachinisT wrote:

"Pete C." wrote in message
. com...

PrecisionmachinisT wrote:

wrote in message
...
Greetings Karl,
If I had to trim a bunch of cases I'd do it in the mill. Using a V
block and a toggle clamp would probably work well. If you mount the
toggle clamp at an angle such that it moves toward the primer end
when
clamping then the case would be pulled tight against the mill table
and the lengths would repeat closely. I have mounted on my
Bridgeport
a switch that is controled by an adjustable screw that mounts in the
quill stop. I use this switch to control a solenoid operated air
valve. I have several air clamps that I've cobbled up from air
cylinders and the like. When the quill is raised the switch turns on
the solenoid which in turn opens the air clamp. If you have enough
cases to trim you could save a lot of time. I'll bet a cycle time,
part to part, of less than 7 seconds, would be esay to attain. I
could
post pictures of the switch setup and a clamp or too if anybody is
interested.


I generally use an air-actuated vise in a cnc mill for that kind of
thing.

One of those air operated 5C collet closers periodically seen in the
ENCO flyers perhaps?

No, I was actually referring to one of these type:

http://www.heinrichco.com/savise.htm


I understood what you meant about the vise, I was just proposing that an
air collet closer might work well. Setup that noted switch on the mill
quill to control an air valve, then just place a shell into the collet
against the stop with one hand and pull the mill quill handle down with
the other, automatically clamping before the cutter reaches the shell
and automatically unclamping when the quill returns up. Seems pretty
fast.

Depends on which type of cartridge rim you are dealing with.