Abrasive belt grinders and sanders come in a variety of different sizes for deburring, shaping, sanding, polishing, grinding, sharpening, cleaning, and de-scaling metal. The right size of belt and contact wheel is key for achieving proper contact to your part, while grinding to the desired radius.
This grinder works well belt tracking is something you have to get used too but overall it is a nice piece of equipment for the money. I have used a homemade grinder for the last few years and even my wife has noticed an improvement on overall flat grinds. Havent tried hollow grinding yet.