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



This has been discussed extensively before. Google this group for
_vacuum, fixture, pump_ etc.

fred