I agree with big guy, something doesn't add up in the HP to output stated. I have a 1.5hp steel gears grinder (commericial grade) it pumps out around 15lbs/min (real world time not specs). It is a great tool but certainly not requiredfor a single/home user who does limited amount of grinding each year. I'd suggest something in the 3/4hp range with steel gears if your wanting to not make it a long process and mayactuallyenjoy using the grinder.