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Similarities And Differences Between Diamond Grinding Wheel And CBN Grinding Wheel In Application
Jan 08, 2019

From the perspective of abrasives:

CBN is a compound boron nitride, and diamond is elemental carbon.

Different processing objects:

Diamond grinding wheel is mainly used to process hard and brittle materials, such as: carbide, ceramic, glass, gemstones and other workpieces;

CBN (cubic boron nitride) grinding wheel is mainly used to process hard and tough materials, especially ferrous metals, such as various steel parts, cast iron, etc.,  work pieces such as : auto parts - crankshaft, camshaft,, hydraulic parts, compressor parts ,etc.

CBN (cubic boron nitride) can withstand high temperatures of 1250-1350 degrees Celsius, which is higher than the heat resistance of diamonds of 800 degrees Celsius. when grinding and cutting iron materials, there is no sticking phenomenon, grinding hardened steel, high vanadium high-speed steel, aluminum high-speed steel and other metal materials sensitive to grinding temperature are the most ideal grinding wheel.

CBN (cubic boron nitride) is also characterized by strong chemical inertness. CBN (cubic boron nitride) is not easy to chemically react with iron elements, so it can replace diamond, for various high speed steel, tool steel, die steel, high alloy hardened steel, chrome steel, nickel alloy, powder metallurgy steel and high temperature. Grinding of materials such as alloys with high temperatures, high hardness, and low thermal conductivity is very suitable. Therefore, in processing the above iron group element material, the durability of CBN  is 3-5 times higher than that of the diamond wheel.

However, CBN (cubic boron nitride) is not a substitute for diamond grinding wheel for   grinding hard and non-metallic hard materials.

When grinding, only oily coolant can be used, but water-based coolant cannot be used because CBN will react chemically in the alkaline aqueous solution at  high temperature of grinding, . The CBN grinding wheel will decompose in the alkaline solution at 300 ° C, and it will be decomposed in boiling water, and the crystal shape will be destroyed.

In terms of production cost, JR Diamond Tools  Co., Ltd. believes that the price of CBN grinding wheel is much higher than the price of diamond grinding wheel. If the workpiece is allowed to be processed, the diamond grinding wheel is preferably the same as the CBN grinding wheel. Therefore, the diamond grinding wheel and the CBN grinding wheel have their own strengths in the grinding process, and each has its own responsibility. Grinding must choose the tool that suits your work , not the most expensive tool.