On 25 Mar 2006 05:20:39 -0800, "Mikester" wrote:

What's the rule of thumb for amount of vacuum/pressure required to hold
a flat part for milling operations?

I need to machine up aluminum and plastic plates.

Aluminum plate 4"x4" square
flat plastic puck 2.5" round

Can anybody point me to some links for low cost DIY alternatives to
buying a plate/pump set?

TIA, Mike

Someone may wish to mention safety concerns if it comes loose ....
--
Cliff