A few speed controller kits here
Are hoover and washing machine motors AC or DC motors?
A few speed controller kits here
Ref the two devices you want to build. Why not double up and get hold of n old henry vacume as it has boyh suck and blow. Just move it from the dust extraction setup over to your forge and connect Two fo One. Don't use it on both at same time cos some dust will go through vac and blow into your forge....Flame thrower!!
Most Ac some DC !!
This is turning into a very messy thread, I'll split it up later.