On Sun, 07 Apr 2013 19:11:20 -0500, dpb wrote:

On 4/7/2013 6:37 PM, Steve B 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?

Nail guns...

A fastly instantly air pressure actuator?