For many people, it is hard to choose the right type of grinding wheel.

Here we will discuss how to choose the right type of grinding wheel. Before that, we need to know some basic knowledge about grinding.

Normally, the smaller the surface roughness value, the better the wear resistance, corrosion resistance and fatigue resistance of the workpiece will be.

Which grit of grinding wheels to choose

Among the main process factors that affect the surface roughness of the grinding process, the particle size of the grinding wheel has a significant impact on it. The finer the particle size of the grinding wheel, the more abrasive particles involved in the grinding, the lower the surface roughness of the grinding.

Generally , 46-80 grit size ginding wheels are used coarse grinding, 150-240 grit size grinding wheels are used for fine grinding. W10-W7 grit size resin graphite grinding wheels are used for mirror grinding to obtain much better surface roughtness of the workpiece.

What is Ra?

Normally the workpiece will have a requirement of roughness on the surface.

Ra represents the roughness level. The smaller the Ra value, the more flat of the workpiece surface.

Take below form as reference.

   In recent years, with the development and application of new technologies and the development of high-precision grinding technology, the grinding size has reached 0.1-0.3um. the surface roughness has reached 0.2-0.05um. The surface deterioration and residual stress are both very small. The processing quality has been greatly improved.