The figures for an old-style 18v DeWalt drill motor are far better though (available from the US - http://www.robotcombat.comwww.robotcombat.com or http://www.teamdelta.com/products/prod5.htmwww.teamdelta.com/products/prod5.htm). If you brought the matching gearbox (maybe the kit from team delta which includes a mount) then you could get 34mph hammer speed with 14kg tip torque if you use it in low gear geared up by 1:2.