| Year | 2006 |
| Date | 17-Mar |
| Volume | 196 |
| Issue | 4,269 |
| Page | 339 |
| Category | Lathe |
| Part | |
| Title | Cutting Spiral Gears in the Lathe |
| Author | Rex Swensen |
| Notes | Explains his methods. Hobbing process, leadscrew ratios, computer, helical gear equations, possible gear solutions 8:16 teeth, spiral design for cam shaft drive |