| Year | 1950 |
| Date | 06-Apr |
| Volume | 102 |
| Issue | 2,550 |
| Page | 477 |
| Category | In The Workshop |
| Part | 60 |
| Title | Building the 3/8 in. Cowell Drilling Machine from Castings |
| Author | "Duplex" |
| Notes | Flycutting the keyway in the spindle, the spindle, the drive pulley, the spindle thrust bearing, the headstock spindle bush, modified spindle driving arrangement, the jockey pulley assembly |