| Year | 1990 |
| Date | 20-Jul |
| Volume | 165 |
| Issue | 3,877 |
| Page | 108 |
| Category | Workshop |
| Part | 14 |
| 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. Faceplate no more, counting the "clicks", continuous boring |