| → It should have appropriate pressure angle to absorb tension of chain. |
→ It should have appropriate escape angle to prevent interference upon elongation of |
| chain during operation |
→ Pressure angle must be preserved when matching positoin changes by abrasion and |
| elongation of chain |
→ Processing must be easy
 Materials
| → Since strong wear resistance is required at the bottom of tooth to minimize impact |
| during chain operatoin and abrasion caused by contact with roller, material appropriate |
| for heat treatment is selected |
→ Sprocket with hardened tip is used when wear resistance is required
| |
Type of tooth: S-type nd U-type are used in general. (Refer to KS and JIS standards)
Ideal tooth conditions