Originally Posted by witold Very inefficient! You will need a lot of compressed air to produce even small volume of the vacuum! |
Not if you can get a leak free seal. With an automatic system (with check valve and vacuum switch), My veneer press will only run about 10-15 seconds every 1/2 hour. At about 25-28" of Hg.
But, you must have a very good seal.
Woodsmith, issue #40 I think, has an article on making clamping jigs with a venturi pump.