Re: [CAD_CAM_EDM_DRO] Air Cylinder Press

In a message dated 29-07-00 21:21:08 Central Daylight Time,
jtregister@... writes:

<< You really do not want to use air to power a press. Imagine pressing a
bearing off a shaft. Once the parts separate, there is nothing to restrain
the air cylinder from flying to its fully extended position - except maybe
fingers and toes. >>

Jim has this right! BOOM! But "plans"? All you gotta do is buy a big ol'
3.5" bore air-piston ("cylinder") from Graingers, weld-up some bar-stock to
make a little "C-frame", and drill some holes and tighten a few bolts (the
big pistons Graingers sells even have four tapped "bolt holes" on the back
side!) And rig a valve. Not exactly shuttle-science! I have built several
such for clamping small wooden parts for glueing (in an application-specific
musical-instrument mfg. proceedure) and for pressing pins in pre-drilled
keyboard-frames for organs.

Only... As Jim said, this is dangerous and usually "surprising", and
generally hazardous to the basic health of the digits and usually-unprotected
corneas!

I wouldn't suggest you begin using such a device, even if very, very well
made, without SEEING on in use, and what for, for a few months, first.