| Number of Teeth (Chordal Action) | Nom. Pitch Diameter | Nom. Outer Diameter | Nom. Hub Width | Available Bore Sizes | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| in | mm | in | mm | in | mm | Round in | Square in | Round mm | Square mm | |
| 12 (3.41%) | 3.9 | 99 | 3.9 | 99 | 1.0 | 25 | 1.25 | 1.5 | 40 | |
| 16 (1.92%) | 5.1 | 130 | 5.2 | 132 | 1.0 | 25 | 1.25 | 1.5 | 40 | 40 |
| 18 (1.52%) | 5.8 | 147 | 5.9 | 150 | 1.0 | 25 | 1.25 | 1.5 | 40 | 40 |
| 20 (1.23%) | 6.4 | 163 | 6.5 | 165 | 1.0 | 25 | 1.25 | 1.5 | 40 | 40 |
