SMT 640 - with built-in 5/8"-11 hole & thread Ease of use and mounting become factors in production shops and in environments where training time is minimal. The SMT 640 is a flat disc with our premium alumina zirconia material and is suitable for use on the same materials and in the same applications as our other flat SMT flap discs. Sold in boxes of 10.
Norton® Red Heat® TwinFiber™ R961 Type 29 80 Grit Flap Disc measuring 6" Dia X 7/8" is made from ceramic alumina/zirconia alumina abrasive material for durability. Conical disc with a speed of 10200 RPM features fiberglass backing to produce quick stock removal and eliminates the 2-step grinding/finishing process of depressed center wheel and resin fiber disc.
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