1. CPC Sections
  2. CPC Section B
  3. CPC Class B23
  4. CPC Subclass B23G
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
B23G
THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (making helical grooves by turning B23B 5/48, by milling B23C 3/32, by forging, pressing, or hammering B21K 1/56, by grinding B24B 19/02; arrangements for copying or controlling B23Q; thread-forming by corrugating tubes B21D 15/04, by rolling B21H 3/02) [2018-08]
NOTE

  • 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
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
B23G 1/00
Thread cutting; Automatic machines specially designed therefor [2013-01]
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) [2013-01]
B23G 1/04
. .
Machines with one working-spindle [2013-01]
B23G 1/06
. . .
specially adapted for making conical screws, e.g. wood-screws [2013-01]
B23G 1/08
. .
Machines with a plurality of working spindles [2013-01]
B23G 1/10
. . .
specially adapted for making conical screws, e.g. wood-screws [2013-01]
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 [2017-08]
B23G 1/14
. . .
specially adapted for making conical screws, e.g. wood-screws [2013-01]
B23G 1/16
.
in holes of workpieces by taps (B23G 1/26, B23G 1/32, B23G 1/36 take precedence) [2013-01]
B23G 1/18
. .
Machines with one working spindle [2013-01]
B23G 1/185
. . .
{specially adapted for making nuts} [2013-01]
B23G 1/20
. .
Machines with a plurality of working spindles [2013-01]
B23G 1/205
. . .
{specially adapted for making nuts} [2013-01]
B23G 1/22
.
Machines specially designed for operating on pipes or tubes [2013-01]
B23G 1/225
. .
{automatically controlled} [2013-01]
B23G 1/24
. .
portable [2013-01]
B23G 1/26
.
Manually-operated thread-cutting devices (features of the threading tool per se B23G 5/00) [2013-01]
B23G 1/261
. .
{Die and tap wrenches (lubricating and cooling devices therefor B23G 5/005; B23G 1/265 takes precedence)} [2013-01]
B23G 1/262
. . .
{Tap wrenches having a V slot (B23G 1/264 takes precedence)} [2013-01]
B23G 1/263
. . .
{Die wrenches having a cylindrical opening and a clamping screw} [2013-01]
B23G 1/264
. . . .
{comprising tap wrench features with a V slot} [2013-01]
B23G 1/265
. .
{Die and tap wrenches with a guiding part (lubricating and cooling devices therefor B23G 5/005)} [2013-01]
B23G 1/266
. . .
{Tap wrenches having a V slot (B23G 1/268 takes precedence)} [2013-01]
B23G 1/267
. . .
{Die wrenches having a cylindrical opening and a clamping screw} [2013-01]
B23G 1/268
. . . .
{comprising tap wrench features with a V slot} [2013-01]
B23G 1/28
. .
with means for adjusting the threading tool [2013-01]
B23G 1/30
. .
without means for adjusting the threading tool, e.g. with die-stock (tap wrenches B25B) [2013-01]
B23G 1/32
.
by milling [2013-01]
B23G 1/34
. .
with a cutting bit moving in a closed path arranged eccentrically with respect to the axis of the rotating workpieces [2013-01]
B23G 1/36
.
by grinding [2013-01]
B23G 1/38
. .
with grinding discs guided along the workpiece in accordance with the pitch of the required thread [2013-01]
B23G 1/40
. .
with grinding discs guided radially to the workpiece [2013-01]
B23G 1/42
.
Centreless grinding [2013-01]
B23G 1/44
.
Equipment or accessories specially designed for machines or devices for thread cutting [2013-01]
B23G 1/46
. .
for holding the threading tools {(B23B 31/083 takes precedence)} [2013-01]
B23G 1/465
. . .
{comprising arrangements for reversing the rotation of the tool} [2013-01]
B23G 1/48
. .
for guiding the threading tools [2013-01]
B23G 1/50
. .
for cutting thread by successive operations [2013-01]
B23G 1/52
. .
for operating on pipes or tubes [2013-01]
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 [2013-01]
B23G 3/005
.
{for enabling presses to be used for thread cutting} [2013-01]
B23G 3/02
.
for withdrawing or resetting the threading tool [2013-01]
B23G 3/04
. .
for repeatedly setting the threading tool in a predetermined working position [2017-08]
B23G 3/06
.
for compensating inaccuracies in the pitch of the lead-screw [2013-01]
B23G 3/08
.
for advancing or controlling the threading tool or the work by templates, cams, or the like [2013-01]
B23G 3/10
. .
for cutting thread of variable pitch [2013-01]
B23G 3/12
. .
for using several adjacently-arranged threading tools, e.g. using several chasers [2013-01]
B23G 3/14
. .
for cutting thread of conical shape [2013-01]
B23G 5/00
Thread-cutting tools; Die-heads [2013-01]
B23G 5/005
.
{with lubrication or cooling devices} [2013-01]
B23G 5/02
.
without means for adjustment [2013-01]
B23G 5/04
. .
Dies [2013-01]
B23G 5/043
. . .
{with guiding means} [2013-01]
B23G 5/046
. . .
{for conical thread} [2013-01]
B23G 5/06
. .
Taps (chucks therefor B23B 31/00) [2013-01]
B23G 5/062
. . .
{with a guiding means part} [2013-01]
B23G 5/064
. . .
{with weakened shank portion} [2013-01]
B23G 5/066
. . .
{with stops} [2013-01]
B23G 5/068
. . .
{with means for removing the broken tap} [2013-01]
B23G 5/08
.
with means for adjustment [2013-01]
B23G 5/083
. .
{Adjustable dies} [2013-01]
B23G 5/086
. . .
{with guiding means} [2013-01]
B23G 5/10
. .
Die-heads [2013-01]
B23G 5/103
. . .
{with guiding means} [2013-01]
B23G 5/106
. . .
{Collet-type die-heads} [2013-01]
B23G 5/12
. . .
self-releasing [2013-01]
B23G 5/14
. .
Tapping-heads [2013-01]
B23G 5/16
. . .
self-releasing [2013-01]
B23G 5/18
.
Milling cutters [2013-01]
B23G 5/182
. .
{combined with other tools} [2013-01]
B23G 5/184
. . .
{combined with drills (B23G 5/188 takes precedence)} [2013-01]
B23G 5/186
. . .
{combined with chamfering tools} [2013-01]
B23G 5/188
. . . .
{and with drills} [2013-01]
B23G 5/20
.
combined with other tools, e.g. drills {(B23G 5/182 takes precedence; screws which drill and tap F16B 25/00)} [2013-01]
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) [2013-01]
B23G 7/02
.
Tools for this purpose [2013-01]
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 [2013-01]
B23G 9/001
.
{Working screws} [2013-01]
B23G 9/002
. .
{Slotting screw heads or shanks} [2013-01]
B23G 9/003
. .
{Deburring screws} [2013-01]
B23G 9/004
. .
{Finishing screws (B23G 9/003 takes precedence)} [2013-01]
B23G 9/005
.
{Working nuts} [2013-01]
B23G 9/006
. .
{Slotting nuts} [2013-01]
B23G 9/007
. .
{Deburring nuts} [2013-01]
B23G 9/008
. .
{Finishing nuts (B23G 9/007 takes precedence)} [2013-01]
B23G 9/009
.
{Thread cleaning or repairing} [2013-01]
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) [2013-01]
B23G 2200/00
Details of threading tools [2013-01]
B23G 2200/02
.
Tools in which the shank and the cutting part are made from different materials or from separate components [2013-01]
B23G 2200/04
.
Tools with negative cutting angles [2013-01]
B23G 2200/06
.
Connections between parts of threading tools [2013-01]
B23G 2200/062
. .
Brazed connections [2013-01]
B23G 2200/065
. .
Glued connections [2013-01]
B23G 2200/067
. .
Welded connections [2013-01]
B23G 2200/08
.
Threading tools with adjustable elements (manually operated thread cutting devices with means for adjusting the threading tool B23G 1/28) [2013-01]
B23G 2200/10
.
Threading tools comprising cutting inserts [2013-01]
B23G 2200/12
.
Threading tools comprising inserts for thread forming [2013-01]
B23G 2200/14
.
Multifunctional threading tools [2013-01]
B23G 2200/141
. .
Tools comprising means for deburring [2013-01]
B23G 2200/142
. .
Tools comprising means for forming threads by deformation [2013-01]
B23G 2200/143
. .
Tools comprising means for drilling [2013-01]
B23G 2200/144
. .
Tools comprising a die [2013-01]
B23G 2200/145
. .
Tools comprising means for milling features other than the thread [2013-01]
B23G 2200/146
. .
Tools comprising a tap [2013-01]
B23G 2200/147
. .
Tools comprising means for reaming [2013-01]
B23G 2200/148
. .
Tools having means for countersinking [2013-01]
B23G 2200/16
.
Tools with cutting edges spaced unequally around the circumference [2013-01]
B23G 2200/18
.
Tools rotatable in both directions [2013-01]
B23G 2200/20
.
Tools having a brush [2013-01]
B23G 2200/22
.
Tools having an end cap, e.g. for the distribution of cutting fluid [2013-01]
B23G 2200/24
.
Chip breakers [2013-01]
B23G 2200/26
.
Coatings of tools [2013-01]
B23G 2200/28
.
Threading tools having a conical form [2013-01]
B23G 2200/30
.
Cutting edges that are rounded in the cross-sectional view of the cutting edge [2013-01]
B23G 2200/32
.
Tools having a decreasing diameter in the direction of the shank from the tip [2013-01]
B23G 2200/34
.
Tools having an increasing diameter in the direction of the shank from the tip (B23G 2200/28 takes precedence) [2013-01]
B23G 2200/36
.
Tools having provision to produce threads of more than one type or size [2013-01]
B23G 2200/38
.
Tools with shanks having a working end at each end of the shank [2013-01]
B23G 2200/40
.
Tools with variable or different helix angles [2013-01]
B23G 2200/42
.
Hollow tools [2013-01]
B23G 2200/44
.
Taps with more than one threading section, the threading sections being axially spaced from one another [2013-01]
B23G 2200/46
.
Tools having a section of polygonal form, e.g. for the transmission of torque [2013-01]
B23G 2200/48
.
Spiral grooves, i.e. spiral flutes [2013-01]
B23G 2200/50
.
Tools in which the pitch of the teeth is a multiple of the pitch of the thread being produced [2013-01]
B23G 2210/00
Details of threads produced [2013-01]
B23G 2210/04
.
Internal threads [2013-01]
B23G 2210/08
.
External threads [2013-01]
B23G 2210/12
.
Threads having a large diameter [2013-01]
B23G 2210/16
.
Multiple start threads [2013-01]
B23G 2210/21
.
Threads in nuts [2013-01]
B23G 2210/24
.
Threads having a variable pitch [2013-01]
B23G 2210/28
.
Threads having a rounded profile [2013-01]
B23G 2210/36
.
Threads having a square profile [2013-01]
B23G 2210/41
.
Threads having a stepped profile [2013-01]
B23G 2210/44
.
Threads having a trapezoidal profile [2013-01]
B23G 2210/48
.
Threads having a special form or profile not otherwise provided for [2013-01]
B23G 2225/00
Materials of threading tools, workpieces or other structural elements [2013-01]
B23G 2225/04
.
Cubic boron nitride [2013-01]
B23G 2225/08
.
Cermets [2013-01]
B23G 2225/12
.
Chromium [2013-01]
B23G 2225/16
.
Diamond [2013-01]
B23G 2225/165
. .
Polycrystalline diamond [2013-01]
B23G 2225/24
.
Elastomers, e.g. rubber [2013-01]
B23G 2225/28
.
Hard metal, i.e. cemented carbides [2013-01]
B23G 2225/32
.
High speed steel [2013-01]
B23G 2225/36
.
Molybdenum disulphide [2013-01]
B23G 2225/40
.
Plastics not otherwise provided for [2013-01]
B23G 2225/44
.
Titanium [2013-01]
B23G 2225/48
.
Titanium aluminium nitride (TiAlN) [2013-01]
B23G 2225/52
.
Titanium carbide [2013-01]
B23G 2225/56
.
Titanium carbide nitride (TiCN) [2013-01]
B23G 2225/60
.
Titanium nitride [2013-01]
B23G 2240/00
Details of equipment for threading other than threading tools, details of the threading process [2013-01]
B23G 2240/04
.
Compensation of centrifugal force [2013-01]
B23G 2240/08
.
Evacuation of chips or fines [2013-01]
B23G 2240/12
.
Means for cooling or lubrication [2013-01]
B23G 2240/16
.
Equipment for producing threaded component with a rotating disc to hold the components [2013-01]
B23G 2240/20
.
Guiding devices with a pin affixable in a drilling chuck and with free rotation of the threading tool holder with respect to the pin [2013-01]
B23G 2240/24
.
Guides for threading tools having a V-groove for location on cylindrical workpieces [2013-01]
B23G 2240/28
.
Indication scales [2013-01]
B23G 2240/32
.
Threading devices designed to be mounted in the tailstock of a lathe [2013-01]
B23G 2240/36
.
Methods of threading not otherwise provided for [2013-01]
B23G 2240/40
.
Threading equipment having an integrally incorporated driving motor [2013-01]
B23G 2240/44
.
Tap or die wrenches with multiple locations for holding threading tools, e.g. for holding threading tools of different sizes [2013-01]
B23G 2240/48
.
Protective sleeves for taps [2013-01]
B23G 2240/52
.
Sensors [2013-01]
B23G 2240/56
.
Producing or refurbishing threads for spark plugs or glow plugs [2013-01]
B23G 2240/60
.
Thread whirling, i.e. production of a thread by means of an annular tool rotating about an axis not coincident with the axis of the thread being produced [2013-01]