On Apr 8, 3:26*am, mike wrote:
On 4/7/2013 10:59 PM, wrote: On Sun, 7 Apr 2013 16:37:07 -0700, "Steve *wrote:

I need an actuator, but one that is air powered preferably. *Instead of the
shaft coming out slowly, I want it to shoot out instantly upon air pressure
hitting it. *What are those called?

Steve

Check these out

https://www.surpluscenter.com/sort.a...r&keyword=ACSA

The problem with a typical actuator is that the piston is small and the
air inlet is small. *You can't get high speed actuation without high
pressure.
The nail gun has the accumulator built into the piston system with a huge
port between the accumulator and the huge cylinder. *You can get high volume
for fast actuation plus a lot of force with less air pressure.
Gives you a lot finer control.

If I were gonna crack a nut, I'd make a hard rubber platform slightly
thinner than the nut. *Drill a hole in it to guide the nut.
Then play whack-a-mole with a rubber hammer. *Crack your nutz
and reduce tension at the same time.

Based on these...

I don't think he needs high speed

http://lawn-gardening-tools.com/Item...FQThQgod4mgARg
http://lawn-gardening-tools.com/Item/Kinetic-Kracker
http://www.amazon.com/Duke-Company-P.../dp/B000FNK8JK


cheers
Bob