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cutting wheel is used for metal ,bronze pipe . The cutting wheel works in high speed with straight cutting edge and it can be used for long time and especially suitable for cutting mall round steel ,threading steel tube ,angleiron. Features: 1) We can supply grinding wheels and cutting wheels for steel or stone 2) Size: 4", 4-1/2", 5", 7", 9", 12", 14" and 16"Material (the reinforced cutting and grinding discs are made of these materials):1) Aluminium oxide: A 2) White aluminium oxide: WA 3) Single crystal aluminium: SA 4) Zirconia aluminium: ZA 5) Black silicon carbide: C6) Green silicon carbide: GC Total types of products (3 types of cutting and grinding discs in the structure):1) T41 flat cut off discs2) T42 depressed center cut off discs3) T27 depressed center grinding discs4) T 6 Cup wheels = grinding stone The meaning of "T41 A30 R5BF 80m/s":1) T41: T41 flat cut off disc2) A30: aluminium oxide material grit 303) R: hardness grade4) 5: structure number5) B: combined material "resin"6) F: fiber glass reinforced7) 80m/s: r.p.m, means meter per second, rotary speed