Dalboy
Established Member
That is how I extract dust and shavings out of hollow forms always works for me. The biggest problem is all the u tube videos show people blowing it out, so it must be OK to use a compressorIf you blow the dust out it hangs in the air and you breath it in , Very bad for your lungs , I have yet to see replacment lungs for sale ?
You don't need to get inside the hole , If you put the vac end 3/4 of the way across the hole it will pull put the dust , If you cover the hole compleatly it will not get the dust out just cause a compleat vacuum