| Year | 1995 |
| Date | 21-Apr |
| Volume | 174 |
| Issue | 3,991 |
| Page | 468 |
| Category | Workshop |
| Part | 2 |
| Title | Gears from Scratch |
| Author | Jock Smith |
| Notes | Describes spur, helical and spiral gear manufacture. Making a spur gear, addendum correction, helical gears, spiral gears, problems, picture on page 455 |