| Year | 1990 |
| Date | 18-May |
| Volume | 164 |
| Issue | 3,873 |
| Page | 616 |
| Category | Workshop |
| Part | 12 |
| 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. The micrometer knob, final preparations and assembly |