| Year | 1989 |
| Date | 15-Dec |
| Volume | 163 |
| Issue | 3,863 |
| Page | 786 |
| Category | Workshop |
| Part | 7 |
| 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. Out of balance job, clamping screw holes, starting oblique holes |