Tiger® Ceramic 9 in type 27 depressed center Grinding Wheel deliver the next evolution in technology for portable foundry grinding. The bond is formulated to eliminate uneven edge breakage or chipping on the wheel edge. This technology advancement improve operator safety by reducing high energy debris during the grinding process, eliminate the need to dress the wheel to regain a workable edge and provide longer wheel life and increased consistency. The ceramic grain leverage an engineered ultra fine microstructure that self sharpens for ultra fast grinding. Along with the high metal removal rate, the low specific cutting energy of Tiger® Ceramic result in a significant increase in wheel life. The flat profile of the wheel in combination with a depressed center allow for a wide range of grinding angle (0 to 45). These 1/4 in Grinding Wheel are ideal for heavy stock removal, removing crack and surface imperfection, blending parting line, removing flashing on edge of casting with a right angle grinder. Increase production efficiency, reduce downtime and lower overall process cost with Tiger® Ceramic. Tiger® Ceramic Grinding Wheel, Long Life Maximum Performance Superior Cut, 9 in Wheel Diameter, 1/4 in Wheel, Hub Connector, 24 Grit, CER30T Grade, Wheel Type Number: Type 27, 6650 RPM Maximum, Resin Bond, Applicable Materials: Armored Steel/Cast Iron/Cast Steel/Ductile Iron/Hard to Grind/High Nickel Alloy/Inconel/Stainless Steel/Steel/Titanium/Tool Steel, 5/8-11 UNC Center Hole Thread, Wheel Hardness: T, Black Wheel, Reinforced: Yes, Specifications Met: ANSI B7.1