| Year | 1989 |
| Date | 16-Jun |
| Volume | 162 |
| Issue | 3,851 |
| Page | 752 |
| Category | Workshop |
| Part | 1 |
| Title | Boring & Facing Head |
| Author | A.J.Lofquist (U.S.A.) |
| Notes | Describes the function and construction of a Self-Contained Boring and Facing Head. General description of the boring head, modification made in the prototype |