There are many kinds of metal bonds applied in diamond tools, for example, the cemented carbide bond whose skeleton is tungsten carbide, and Fe-based bond whose composition is mainly Fe and Ni. But the most widely used metal bond is bronze.

The bond strength of the bronze bond is high, and this can help to make better use of diamonds. Its wear resistance is good, it can withstand a larger load, and its thermal conductivity is also good. Bronze-bonded diamond tools are mainly used to process non-metallic brittle materials, such as ceramics, glass, stone, concrete as well as gemstone and semi-conductor materials. They are suitable for coarse grinding, half-fine grinding and profile grinding, and are suitable for cutting and edge grinding.

Bronze bonds also have some shortcomings. Its self-sharpening capability is not good. Bronze-bonded diamond tools’ grinding efficiency is lower than the resin-bonded ones’. If they are not properly used, block and heat may be caused, and their dressing is difficult.