The work piece is aluminum, as you see you can't cmpare the speed with any other potable machines.
The Chamfo GTW series models are portable milling units designed for weld preparation, as per beveling amount at a 45 degree, GTW-2700 model is efficient for bevel depth upto 19mm.
It's Light, Strong, and there is no Dust.
more info http://daesunggt.co.kr/english/main/main.htm