| Year | 1950 |
| Date | 23-Mar |
| Volume | 102 |
| Issue | 2,548 |
| Page | 392 |
| Category | In The Workshop |
| Part | 59 |
| Title | Building the 3/8 in. Cowell Drilling Machine from Castings |
| Author | "Duplex" |
| Notes | The rack pinion shaft, modifications to the feed gear, locking the index collar, cutting the index line on the headstock casting, mounting the jockey pulley bracket shaft |