Premium Xtra Power Freehand Depressed Center 9 x 1 4 x 7 8 ( 230x6.0x22mm) Type 27 Abrasive Alu

Production Introduction This Premium Freehand Grinding Disc 9" x 1/4" x 7/8"( 230x6.0x22mm) used on freehand Type27 Xtra Power angle grinder machine mainly for metalworking grinding and stainless steel grinding . It belong to the Resin Bonded Depressed Center Grinding WheelsThe 9" x 1/4" x 7/8"( 230x6.0x22mm) Grinding Disc have outer size d1= 9 inch (180mm), inner hole dimension d2= 7/8 inch(22mm) and the thickness b= 1/4 inch(6.0mm) .The 9 inch Grinding Discs for Metal Steel is mainly made of high quality Aluminum Oxide abrasive material and White Aluminum Oxide material, 2~4 pieces strengthen fiberglass protection nets and so on . The Aluminum Oxide abrasive material make the Xtra Power Grinding wheel get the long life durability character and the white Aluminum Oxide abrasive material make the Resin Bonded Grinding Disc get the best efficiency. So it can be used for Metal steel, tool steels, high-alloy stainless steels, heat-treated steels ,grey cast iron , malleable cast iron , cast steel , ductile graphite iron , manganese cast iron material and so on . Because of the advantages of our Depressed Center Grinding Disc, workers can have the comfortable grinding experience during the using process .Abrasive Material IntroductionGrit Size IntroductionHardness IntroductionA--aluminum oxide16-24   coarse densityD-L  softC--silicon carbide30-60   medium densityM-N mediumZ-- Zirconium aluminum70-220  fine densityP-S  hardZA—Zirconium aluminum/aluminum oxideT-Y  very hardAC—aluminum oxide/silicon carbideWA--white aluminum oxidea) A-for general metalworking cutting and grinding b) ZA or WA- for stainless steel cutting and grindingc) C or GC-for non metal, stone cutting and polishing.This 9 inch Depressed Center Grinding Disc with four strengthen fiberglass protection nets