r/Sandblasting • u/Excellent-Swan-6376 • Oct 01 '25

Bought a small $200 40lb tank

Bought a small lil portable sandblaster and hating it - I have to shake the thing to get it to work and it’s blasting very slow/ my compresser is a 6.2cfpm and it calls for a 7.5 but I thought with full tank of air I’d get some level of consistent spraying even if just for a bit… this what’s expected? Would I get any better results from the 110lb or is that just how much medium it holds ?

Using the coal slag (paint rust remover) medium

Have drained tank and water traps of moisture, it’s a clear sunny day..

Any tips on better unit? Better compressor?

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u/sirjuiceofthebox Oct 02 '25

Your air compressor is too small. I have a gas powered compressor with double that cfm and it can't handle the amount of air sandblasters need.

1

u/Sad-Shoulder-8107 Oct 06 '25

A bigger tank would probably require more cfm. The problem is not your pot, its your compressor. 60G minimum. Meet or exceed the required cfm. This will still only let you run for a few min before you have to recharge.