| Year | 1986 |
| Date | 18-Jul |
| Volume | 157 |
| Issue | 3,781 |
| Page | 73 |
| Category | Workshop |
| Part | |
| Title | Parallel Depth Bevel Gears |
| Author | G.Tardrew (S. Africa) |
| Notes | Calculation of dimensions for turning blanks, turning the cast iron blanks, milling the teeth, operations 1 to 3, conclusion |