| Year | 1952 |
| Date | 10-Jan |
| Volume | 106 |
| Issue | 2,642 |
| Page | 55 |
| Category | In The Workshop |
| Part | 106 |
| Title | Making a Twist Drill Grinding Jig |
| Author | "Duplex" |
| Notes | The body, ball-bearings and spindle, end plates, bearing clamp collars, spindle bush for grinding wheel, pulley and driving belt |