Sprockets are classified according to Type A, Type B, Type C, and Type D, which are introduced as follows:
1. Type A
This sprocket is flat and has no hub on it. They are usually installed on the flange or hub of the equipment. They pass through a series of ordinary or thin holes.
2. Type B
There is a hub on one side of this sprocket. This allows the sprocket to be tightly mounted on the machine on which it is installed. Therefore, it reduces the large overhanging load on the equipment bearings.
3. Type C
The C-type sprocket has hubs on both sides of its plate. It is usually used in applications where the pitch diameter is larger and the shaft needs to support more weight. Larger loads require larger wheels.
4. Type D
These sprockets use type A sprockets mounted on solid or split hubs. The sprocket is easily disassembled with a splint and bolted to the hub. There is no need to disassemble bearings and other equipment, because without it, the speed ratio can be changed.
