B23G THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (making helical grooves by turning B23B5/48, by milling B23C3/32, by forging, pressing, or hammering B21K1/56, by grinding B24B19/02; arrangements for copying or controlling B23Q; thread-forming by corrugating tubes B21D15/04, by rolling B21H3/02)
Introduced: September 1968
Description
This subclass encompasses machines, tools, and processes for cutting external and internal threads on workpieces, as well as forming, shaping, and finishing operations on screws, bolts, bolt heads, and nuts during or following thread production. Covered technologies include thread-cutting machines (lathes, threading machines, tapping machines), cutting tools (thread dies, taps, cutting inserts), and automated systems for complete screw and fastener manufacturing. The classification also includes associated operations such as head forming, slot cutting, chamfering, and deburring when performed as integral steps in screw or bolt production.
Title
Titles differ between systems:
IPC: THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS OR NUTS, IN CONJUNCTION THEREWITH
CPC: THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (making helical grooves by turning B23B5/48, by milling B23C3/32, by forging, pressing, or hammering B21K1/56, by grinding B24B19/02; arrangements for copying or controlling B23Q; thread-forming by corrugating tubes B21D15/04, by rolling B21H3/02)
Full Title
Full titles differ between systems:
THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS OR NUTS, IN CONJUNCTION THEREWITH
THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (making helical grooves by turning B23B5/48, by milling B23C3/32, by forging, pressing, or hammering B21K1/56, by grinding B24B19/02; arrangements for copying or controlling B23Q; thread-forming by corrugating tubes B21D15/04, by rolling B21H3/02)
Of 10 combined children, 6 exist in both systems.
4 codes are CPC-only extensions.
Note: 4 CPC extensions are marked as secondary classification only.
4 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B23G 1/00 Thread cutting; Automatic machines specially designed therefor IPC+CPC Available in IPC and CPC
- B23G 11/00 Feeding or discharging mechanisms combined with, or arranged in, or specially adapted for use in connection with, thread-cutting machines (for machines tools in general B23Q) IPC+CPC Available in IPC and CPC
- B23G 2225/00 Materials of threading tools, workpieces or other structural elements 2nd only +14 CPC CPC only CPC only
- B23G 2240/00 Details of equipment for threading other than threading tools, details of the threading process 2nd only +15 CPC CPC only CPC only
- 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 +1 CPC IPC+CPC Available in IPC and CPC
- 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 B23G1/00) IPC+CPC Available in IPC and CPC
- 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 +3 CPC IPC+CPC Available in IPC and CPC