"Ed Pawlowski" wrote

There are pneumatic cylinders that will do that.
Start here
http://www.mcmaster.com/#standard-air-cylinders/=m84511

Looks like what I need. I want two to slam into two ends of a pecan to
instantly fracture if for nut removal. Pecan halves are worth a lot more
than plain nuts. I'll read up on this, and see if they will work.

Thanks.

Steve