... wheel, we can produce the stone grinding wheel, stainless steel grinding wheel, stone grinding wheel. The detail technical information as follows ... products (3 types of cutting and grinding discs in the structure):1) T41 flat cut off discs2) T42 ... depressed center grinding discs4) T 6 Cup wheels = grinding stone The meaning of "T41 A30 R5BF 80m/s":1) T41 ... /s: r.p.m, means meter per second, rotary speed