re: Vacuum chuck

I use the Hold Fast system and like it very much. It’s a Venturi system, so you need to have a compressor…a larger one will run less often. Mine runs very infrequently. Just finished removing the tenon and shaping the foot of a bowl. I was in no hurry to get it done, but I didn’t specifically drag…I don’t know that I heard the compressor (60 gallon) run more than once. Anyway, I’m very happy with it. 

That said, I believe it can be used, with out the Venturi, using a vacuum pump too…