Material: Steel C45, not hardened. * Sprockets from 31 teeth and more are reinforced (H = 4 mm, see drawing). Pre-bored. General dimensions: B1 = 3 mm, c = 1,0 mm, r3 = 13 mm. Other dimensions: See the table.
| No. of Teeth | 21 |
|---|---|
| da (mm) | 91,0 |
| d (mm) | 85,22 |
| ND (mm) | 60 |
| B (mm) | 12 |
| L (mm) | 20 |
| Weight (g) | 478 |
