| Year | 1990 |
| Date | 15-Jun |
| Volume | 164 |
| Issue | 3,875 |
| Page | 739 |
| Category | Workshop |
| Part | 13 |
| 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. Examples of plain boring, concave curved surfaces, awkward sized jobs |