If you are into professional metalwork and you frequently need a large, heavy-duty and powerful manual grinding machine, this calls for the use of a 9-inch angle grinder.
Such size could work well either for heavy concrete jobs or for massive metal grinding work. Yes, the 9-inch angle grinder could be as heavy as 10 pounds that it can hurt your shoulder and arms using it the whole day. But with such a large machine and powerful tool that can pack up to 2000 watts and up to 15 watts of power, it can be the best choice for professional welders, metal fabricators and construction workers.
Because of the power that it is loaded with, this heavy-duty tool can clean out, de-rust, polish and grind wide surfaced metal in a shorter time. If you are willing to save a lot of manual work hours to your work, you better opt for this type.
For example, if you had cut a wide sheet of metal about 1.5-inch thick using a plasma cutter that leaves large rough and jagged edges on the cut, the quickest way to smooth up these edges is by using a heavy-duty, large angle grinder like the 9-inch type. And yes, this can deal with the toughest metal.
With its large disc features and offering a variety of disc consumables for any type of grinding tasks, this should fit your need for heavy-duty work.