B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SHAPING
 B23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR (punching, perforating, making articles by processing sheet metal, tubes, or profiles B21D; wire-working B21F; making pins, needles, or nails B21G; making chains B21L; grinding B24)
 B23

Note(s)

  1. In addition to operations not provided for in any other class, this class provides, in sub-class B23P, for combinations of operations provided for in different sub-classes of classes B21-B24, with the exception of subsidiary operations performed in conjunction with main operations covered by a single sub-class.
  2. In the following elaborations:
    1. The term "metal-working" should be understood as covering the working of other materials unless the context requires otherwise.
    2. The term "kind of operation" and similar expressions relate to such metal-working operations as boring, drilling, milling and grinding.
    3. The term "kind of machine" means a machine designed for a particular kind of metal-working operation (e.g. a lathe).
    4. The term "form of machine" means a machine of a particular kind adapted or arranged for a particular way of working or for particular work, e.g. face-plate lathe, tailstock lathe, turret lathe.
    5. The term "different machines" is to be understood as covering different forms of machines for performing the same type of metal-working operation, e.g. vertical and horizontal boring machines.
  3. Sub-class B23Q comprises features, specific to machine tools, which relate to a requirement or problem of a nature which is not peculiar to a particular kind of machine tool, e.g. feeding work, although the realisation of these features may differ according to the kind of machine tool concerned. That sub-class provides in general for such features, even if the feature or a specific function, in any particular case, is to some extent peculiar to, or is claimed only for, machine tools designed for one particular operation; only in exceptional cases are such features to be classified in the sub-class for the machine tool concerned. Certain features of this general nature are, however, referred to sub-classes relating to particular metal-working operations, especially B23B, in which case the sub-classes in question are not restricted, in respect of those features, to the kind of machine tool with which they are primarily concerned. If details, components, or accessories have no essential feature specific to machine tools, the more general class, e.g. F16, takes precedence.
 B23G
THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (thread-forming by corrugating tubes B21D 15/04; by rolling B21H 3/02, by forging, pressing, or hammering B21K 1/56; making helical grooves by turning B23B 5/48, by milling B23C 3/32, by grinding B24B 19/02; arrangements for copying or controlling B23Q)
 B23G

Note(s)

The term "thread cutting" is to be understood as including the use of tools similar both in form and in manner of use to thread-cutting tools, but without removing any material.

 B23G 1/00
Thread cutting; Automatic machines specially designed therefor
 B23G 1/02
·  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)
 B23G 1/04
·  ·  Machines with one working-spindle
 B23G 1/06
·  ·  ·  specially adapted for making conical screws, e.g. wood-screws
 B23G 1/08
·  ·  Machines with a plurality of working-spindles
 B23G 1/10
·  ·  ·  specially adapted for making conical screws, e.g. wood-screws
 B23G 1/12
·  ·  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
 B23G 1/14
·  ·  ·  specially adapted for making conical screws, e.g. wood-screws
 B23G 1/16
·  in holes of workpieces by taps (B23G 1/26, B23G 1/32, B23G 1/36 take precedence)
 B23G 1/18
·  ·  Machines with one working-spindle
 B23G 1/20
·  ·  Machines with a plurality of working-spindles
 B23G 1/22
·  Machines specially designed for operating on pipes or tubes
 B23G 1/24
·  ·  portable
 B23G 1/26
·  Manually-operated thread-cutting devices (features of the threading tool per se B23G 5/00)
 B23G 1/28
·  ·  with means for adjusting the threading tool
 B23G 1/30
·  ·  without means for adjusting the threading tool, e.g. with die-stocks (tap wrenches B25B)
 B23G 1/32
·  by milling
 B23G 1/34
·  ·  with a cutting bit moving in a closed path arranged eccentrically with respect to the axis of the rotating workpiece
 B23G 1/36
·  by grinding
 B23G 1/38
·  ·  with grinding discs guided along the workpiece in accordance with the pitch of the required thread
 B23G 1/40
·  ·  with grinding discs guided radially to the workpiece
 B23G 1/42
·  Centreless grinding
 B23G 1/44
·  Equipment or accessories specially designed for machines or devices for thread cutting
 B23G 1/46
·  ·  for holding the threading tools
 B23G 1/48
·  ·  for guiding the threading tools
 B23G 1/50
·  ·  for cutting thread by successive operations
 B23G 1/52
·  ·  for operating on pipes or tubes
 B23G 3/00
Arrangements or accessories for enabling machine tools not specially designed only for thread cutting to be used for this purpose, e.g. arrangements for reversing the working-spindle
 B23G 3/02
·  for withdrawing or resetting the threading tool
 B23G 3/04
·  ·  for repeatedly setting the threading tool in a predetermined working position
 B23G 3/06
·  for compensating inaccuracies in the pitch of the lead-screw
 B23G 3/08
·  for advancing or controlling the threading tool or the work by templates, cams, or the like
 B23G 3/10
·  ·  for cutting thread of variable pitch
 B23G 3/12
·  ·  for using several adjacently-arranged threading tools, e.g. using several chasers
 B23G 3/14
·  ·  for cutting thread of conical shape
 B23G 5/00
Thread-cutting tools; Die-heads
 B23G 5/02
·  without means for adjustment
 B23G 5/04
·  ·  Dies
 B23G 5/06
·  ·  Taps (chucks therefor B23B 31/00)
 B23G 5/08
·  with means for adjustment
 B23G 5/10
·  ·  Die-heads
 B23G 5/12
·  ·  ·  self-releasing
 B23G 5/14
·  ·  Tapping-heads
 B23G 5/16
·  ·  ·  self-releasing
 B23G 5/18
·  Milling cutters
 B23G 5/20
·  combined with other tools, e.g. drills
 B23G 7/00
Forming thread by means of tools similar both in form and in manner of use to thread-cutting tools, but without removing any material (features of machines or devices not specially adapted to the particular mode of forming the thread B23G 1/00)
 B23G 7/02
·  Tools for this purpose
 B23G 9/00
Working screws, bolt heads or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw thread (making washers or nuts by processing metal sheets, tubes or profiles without essentially removing material B21D 53/20, B21D 53/24)
 B23G 11/00
Feeding or discharging mechanisms combined with, or arranged in, or specially adapted for use in connection with, thread-cutting machines (for machine tools in general B23Q)