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Structural characteristics of sprockets
Dec 26,2025
Tooth profile design: The tooth profile of the sprocket should be easy to process, not easily detached, and ensure that the chain enters and exits the mesh smoothly and smoothly, while also ensuring even force distribution on the chain. According to national standards, for sprockets processed with standard cutting tools, only the pitch, number of teeth, and pitch circle diameter of the sprocket need to be provided. The end face tooth profile is usually composed of three circular arcs and a straight line, abbreviated as the "three circular arcs and one straight line" tooth profile.
Material selection: The sprocket material should ensure that the teeth have sufficient strength and wear resistance, so a certain heat treatment process needs to be adopted to strengthen the tooth surface. The commonly used materials include carbon steel (such as 20, 35, 40, 45, etc.), gray cast iron (such as HT150, HT200, etc.), cast steel (such as ZG310-570, etc.), and alloy steel (such as 20Cr, 35CrMo, 40Cr, etc.). Steel with low carbon content is suitable for chain wheels that can withstand impact loads, while cast steel is suitable for chain wheels that are prone to wear but do not experience severe impact vibrations. Chain wheels that require high strength and wear resistance must be made of alloy steel.
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