A grinding wheel is a circular bonded abrasive tool with a central through-hole, made of abrasive and bonding agents. The characteristics of a grinding wheel are determined by factors such as abrasive, grit size, hardness, bonding agent, shape, and size, which are described below.
Abrasive Selection
Abrasive is the main raw material for manufacturing grinding wheels, and it is responsible for cutting. Therefore, the abrasive must be sharp and possess high hardness, good heat resistance, and a certain degree of toughness.
Grit Size and its Selection
Grit size refers to the size of the abrasive particles. Grit size is divided into two categories: abrasive grains and micro-powder. Abrasive grains with a particle size greater than 40μm are called abrasive grains. They are classified using a sieving method, with the grit number indicating the number of openings per inch of the sieve through which the abrasive grain passes. For example, a 60# abrasive grain means that its size is just enough to pass through a sieve with 60 openings per inch. Abrasive grains with a particle size less than 40μm are called micro-powder. They are classified using a microscopic measurement method, with the grit number indicated by W followed by a number, where the value after W represents the actual size of the micro-powder. For example, W20 indicates that the actual size of the micro powder is 20μm.
