High-quality materials, excellent craftsmanship, safe, reliable and durable, Many size and complete specifications, convenient and flexible installation, convenient maintenance and better cost performance.

Model Notes:
1. The first letter of the code: the meaning of the crown gear
2. Two or three digits of the code: the number of teeth of the gear's outer teeth
3. four or five digits of the code: the number of teeth of the gear's internal teeth
4. The sixth digit of the gear: the size of the gear aperture
5. Code in English: "A": tight fit / "B": loose fit
6. (Forward), is that the crown of the circle of gears is the same direction as the pinion

Note: If it is composed of three digits plus two letters, it means that there is no gear in the inner diameter!

"2A" means that the centre shaft is 1.95mm; with 2mm bare shaft, tightly fitted, with the bare shaft together with the rotation.

"2B" means that the central axis is 2.05mm; with 2mm bare shaft, loose fit, free rotation on the bare shaft.

"2.5B" indicates that the centre axis is 2.55mm; loosely fitted with a 2.5mm bare shaft, it rotates freely on the bare shaft.

"3A" means that the centre axis is 2.95mm; with 3mm bare shaft, it is tightly fitted and rotates with the bare shaft.

Gear diameter calculation formula (mm): (number of teeth + 2) X 0.5 

Example:
Dimensions of C303A: Crown gear, 30 external teeth, bore diameter 3mm tightly fitted 3mm shaft, Gear outer diameter: 16mm

Dimensions of C30102B: Crown gear, 30 external teeth, 10 internal teeth, 2mm bore loose fitting 2mm shaft.

Gear Diameter: (30+2) X 0.5 (mm) = 16mm,  Gear outer diameter is 16mm.

- Module: 0.5

- Thickness: 4-5mm

- Available Models：
C152A
C203A
C282A
C282.5A
C303A
C322A
C20082A
C28082B
C28102.5B
C30102B
C40102B
C24102A
C30122B
C32102B
C202.5A (Forward)
C36102B (Forward)
C36082B (Forward)