According to specifications or size classification, gear models are divided into two types: standard and non-standard;
According to different measurement units at home and abroad, gear models are divided into metric and imperial systems.
Metric Gear Model
Domestically, the metric system/modulus (M/m) is mainly adopted. Gear modulus = index circle diameter ÷ number of teeth = gear outer diameter ÷ (number of teeth + 2).
The main models of metric gears are: M0.4 M0.5 M0.6 M0.7 M0.75 M0.8 M0.9 M1 M1.25 M1.5 M1.75 M2 M2.25 M2.5 M2.75 M3 M3. 5 M4 M4.5 M5 M5.5 M6 M7 M8 M9 M10 M12 M14 M15 M16 M18 M20 M22 M24 M25 M26 M28 M30
Inch gear model
DP gear is an inch gear (diameter pitch gear) used in Europe and the United States and other countries. It refers to the number of teeth per inch of the index circle diameter. The larger the value, the smaller the tooth. Diameter DP=z/D (z—number of teeth, D—diameter of index circle, inch), the unit of diameter pitch DP is (1/in). The conversion relationship between it and the metric system is m=25.4/DP, which means it is the same as our commonly used modulus.
The main models of inch gears are: DP1 DP1.25 DP1.5 DP1.75 DP2 DP2.25 DP2.5 DP2.75 DP3 DP4 DP4.5 DP5 DP6 DP7 DP8 DP9 DP10 DP12 DP14 DP16
