| Year | 1942 |
| Date | 23-Apr |
| Volume | 86 |
| Issue | 2,137 |
| Page | 399 |
| Category | Workshop |
| Part | |
| Title | Disc Screwcutting Tools |
| Author | "Ned" |
| Notes | Making the cutters, the toolholder for external screwcutting and some spare cutters, form of recommended disc cutter, a batch of disc cutters being machined, hardening and tempering, cutting a fine thread for an optical instrument, offset toolholder for external screwcutting, grinding, holder for external screwcutting, holder for internal screwcutting |