Caution: Wear safety glasses in order to avoid eye damage.
| • | Worn teeth (1) |
| • | Damaged teeth (2) |
| • | Chipped teeth (3) |
| • | Worn valleys between the sprocket teeth |
| • | Loose metal inserts (1) |
| • | Cracking (2) in the chain contact area |
| • | Excessive grooves (3) in the chain contact area |
| • | Grooves 1 mm (0.040 in) or less in depth are to be considered normal wear. |