Sandblasting Orifices Question

vegerl

I have just bought a sandblasting gun that comes with three orifices. Which one will allow for the most aggressive paint/rust removal rate? My compressor is more than capable of running this gun. In fact, I'll probably need to turn it down to keep from destroying it. The gun comes with three sizes - Small, medium, and large and I can have two of them machined to match the largest one, if, in fact, the largest one will yield the most aggressive removal rate.

Does the largest orifice size (0.125") yield the most aggresive set-up?

Thanks

ERAD_DIB

A larger orifice will give you the most air flow (volume; CFM) and the fastest removal of whatever it is you're removing, as long as your compressor can deliver the volume. (Well, that's the way it's supposed to work, anyway. )
I think it was from Eastwood's site that I got a chart saying a 0.125 (1/8") nozzle would need 15 CFM at 80 PSI. Miles Supply has something similar for their Lindsay/Marco blasters: 16 CFM, and about 1 sq. ft. per minute getting blasted.
Hope this helps.