Gears mainly refer to mechanical components with teeth on the rim that can continuously mesh to transmit motion and power. Common gears are mainly used in machinery. Therefore, there are many types of gears. Let’s take a closer look.
The specific classifications are as follows:
1.Parallel axis gears: including spur gears, helical gears, internal gears, racks and helical racks, etc.
2.Intersecting axis gears: straight bevel gears, arc bevel gears, zero-degree bevel gears, etc.
3.Staggered axis gears: staggered helical gears, worm gears, hypoid gears, etc.
In addition, gears can be classified in the following ways:
（1）According to the tooth shape of the gear: including involute gears, cycloid gears and circular arc gears, etc.
（2）According to the shape of the gear: cylindrical gears, bevel gears, non-circular gears, racks, worm gears.
（3）According to the shape of the tooth line: spur gears, helical gears, herringbone gears, curved gears.
（4）According to the surface where the gear teeth are located: external gears, internal gears.
（5）According to the manufacturing method: cast gears, cut gears, rolled gears, sintered gears, etc.
