| 1/00 | Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods |
| 3/00 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines |
| 3/02 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Small lathes, e.g. for toolmakers (specially designed for watchmakers G04D 3/00) |
| 3/04 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines in which the workpiece is rotated by means at a distance from the headstock |
| 3/06 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines or devices characterised only by the special arrangement of constructional units (B23Q 37/00 takes precedence; structural features of details, see the relevant groups; such features of general applicability B23Q) |
| 3/08 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines characterised by the use of faceplates |
| 3/10 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines characterised by the use of faceplates with the faceplate horizontal, i.e. vertical boring and turning machines |
| 3/12 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines characterised by the use of faceplates with the faceplate vertical, i.e. face lathes |
| 3/14 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines characterised by the use of faceplates Mountings or drives of faceplates |
| 3/16 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turret lathes for turning individually-chucked workpieces |
| 3/18 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turret lathes for turning individually-chucked workpieces with horizontal working-spindle |
| 3/20 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turret lathes for turning individually-chucked workpieces with vertical working-spindle |
| 3/22 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines or devices with rotary tool heads |
| 3/24 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines or devices with rotary tool heads the tools of which do not perform a radial movement; Rotary tool heads therefor |
| 3/26 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines or devices with rotary tool heads the tools of which perform a radial movement; Rotary tool heads thereof |
| 3/28 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines in which the feed is controlled by a copying device, i.e. copying lathes (features of copying devices B23Q 35/00) |
| 3/30 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines with two or more working-spindles, e.g. in fixed arrangement |
| 3/32 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Turning-machines with two or more working-spindles, e.g. in fixed arrangement for performing identical operations simultaneously on two or more workpieces |
| 3/34 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Short turning-machines with one or multiple working-spindles attended from the end (B23B 3/12 takes precedence) |
| 3/36 | General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines Associations of only turning-machines directed to a particular metal-working result (if the metal-working result is not essential B23Q 39/00) |