The working layer, also known as diamond layer, is composed of abrasive, binder and filler. It is the working part of grinding wheel. The transition layer, also known as non diamond layer, is composed of binder, metal powder and filler. It is the part that firmly connects the diamond layer to the substrate.
The substrate is used to receive the abrasive layer and is firmly clamped on the main shaft of the grinder with a flange when in use. Steel and alloy steel powder are selected as the matrix for general metal bond products; Aluminum alloy and bakelite are selected as resin binder. It is made of aluminum, steel or bakelite and plays the role of supporting the working layer and clamping abrasives. The forming quality and precision of grinding wheel are closely related to the substrate.