The grinding wheel is a round-shaped fixed abrasive having a through hole in the center made of abrasive and a binder. The characteristics of the grinding wheel are determined by factors such as abrasive, particle size, hardness, binder, shape and size, which are described below.
Abrasive selection
Abrasives are the main raw material for the manufacture of grinding wheels, which are responsible for cutting work. Therefore, the abrasive must be sharp and have high hardness, good heat resistance and certain toughness.
Granularity and its choice
Refers to the size of the abrasive particles. The particle size is divided into two types: abrasive grains and fine powder. For abrasives with a particle size greater than 40 μm, it is called abrasive particles. The classification was carried out by a screening method, and the particle size number was expressed by the number of perforations per inch of the sieve passing through the abrasive grains. An abrasive grain such as 60 # indicates that it is just the size of a screen with a 60-hole per inch length. For abrasives with a particle size of less than 40 μm, it is called micropowder. The microscopic measurement was carried out, and the particle size number was represented by W and the following numerals, and the value after W represents the actual size of the fine powder. For example, W20 indicates that the actual size of the fine powder is 20 μm.
