What material is good for the sprocket?

The sprocket material generally needs to meet three requirements:

1) Strength;

2) Wear-resistant;

3) Impact resistance (under impact load), specifically ordinary carbon steel, high-quality carbon steel and alloy steel. Larger sprockets (when the requirements are lower) can be smelted into cast iron, and low-power transmission can also be made of cloth bakelite.


1) When there is impact load, low carbon steel and low carbon alloy steel are generally used → carburizing and quenching → tempering.

2) Medium carbon steel and medium carbon alloy steel are generally used for sprockets with medium speed and large speed without severe impact → quenching and tempering.

3) Sprockets with a large number of teeth (extra large) Z>50 → use gray cast iron.

4) Small and medium power transmission → using ordinary or high-quality carbon steel.

Large and small power transmission → using alloy steel.

5) P<6KW, high-speed chain drive→Bakelite with cloth, less noise and smooth transmission.

6) The material and heat treatment requirements of the small sprocket should be higher than that of the large sprocket - because the meshing times of the small sprocket is more than that of the large sprocket, and the wear and impact are more serious than that of the large sprocket.