Recessed grinding wheels from Norton are designed for use with grinding machines for abrasive cutting of complex-shaped workpieces. Offered in Type-5 one-sided & Type-7 two-sided variants, these grinding wheels come with recesses that can accommodate mounting flanges with an overall diameter of 12 / 14 inches. Norton's SG Series wheels feature high-performance seeded gel-ceramic aluminium-oxide abrasive that offers fast & reliable cutting and stock removal, as well as require very less dressing from time to time.