Tungsten Carbide Rod Surface Roughness

Tungsten Carbide Rod Surface Roughness

Tungsten carbide rods have high hardness and abrasion resistance and thus its grinding process is quite complicated, which includes: coarse grinding, fine grinding, accurate grinding and polishing. There are two types of polishing: matte polishing and mirror polishing.

Grinding can help tungsten carbide rods get higher machining accuracy and lower surface roughness. Grinding precision usually reaches IT6 ~ IT7 tolerance grade, while surface roughness reaching Ra1.25 ~ 0.16μm. Surface roughness Ra of tungsten carbide rods before accurate grinding should be smaller than 6.3um. If tungsten carbide rods are polished, their surface roughness will be up to Ra0.1 μm, which makes its surface be smooth as that of a mirror. Its dimensional accuracy and shape accuracy can be within 1um, the error of which is equivalent to 1/70 thickness of human hair or even thinner. 


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