| 1/00 | Thread cutting; Automatic machines specially designed therefor |
| 1/02 | Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence) |
| 1/04 | Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence) Machines with one working-spindle |
| 1/06 | Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence) Machines with one working-spindle specially adapted for making conical screws, e.g. wood-screws |
| 1/08 | Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence) Machines with a plurality of working-spindles |
| 1/10 | Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence) Machines with a plurality of working-spindles specially adapted for making conical screws, e.g. wood-screws |
| 1/12 | Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence) Machines with a toothed cutter in the shape of a spur gear or the like which is rotated to generate the thread profile as the work rotates |
| 1/14 | Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence) Machines with a toothed cutter in the shape of a spur gear or the like which is rotated to generate the thread profile as the work rotates specially adapted for making conical screws, e.g. wood-screws |
| 1/16 | Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps (B23G 1/26, B23G 1/32, B23G 1/36 take precedence) |
| 1/18 | Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps (B23G 1/26, B23G 1/32, B23G 1/36 take precedence) Machines with one working-spindle |
| 1/20 | Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps (B23G 1/26, B23G 1/32, B23G 1/36 take precedence) Machines with a plurality of working-spindles |
| 1/22 | Thread cutting; Automatic machines specially designed therefor Machines specially designed for operating on pipes or tubes |
| 1/24 | Thread cutting; Automatic machines specially designed therefor Machines specially designed for operating on pipes or tubes portable |
| 1/26 | Thread cutting; Automatic machines specially designed therefor Manually-operated thread-cutting devices (features of the threading tool B23G 5/00) |
| 1/28 | Thread cutting; Automatic machines specially designed therefor Manually-operated thread-cutting devices (features of the threading tool B23G 5/00) with means for adjusting the threading tool |
| 1/30 | Thread cutting; Automatic machines specially designed therefor Manually-operated thread-cutting devices (features of the threading tool B23G 5/00) without means for adjusting the threading tool, e.g. with die-stocks (tap wrenches B25B) |
| 1/32 | Thread cutting; Automatic machines specially designed therefor by milling |
| 1/34 | Thread cutting; Automatic machines specially designed therefor by milling with a cutting bit moving in a closed path arranged eccentrically with respect to the axis of the rotating workpiece |
| 1/36 | Thread cutting; Automatic machines specially designed therefor by grinding |
| 1/38 | Thread cutting; Automatic machines specially designed therefor by grinding with grinding discs guided along the workpiece in accordance with the pitch of the required thread |