B23GTHREAD CUTTINGWORKING 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 B21H3/02The 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 materialIn this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. B23G1/00 B23G1/00Thread cuttingAutomatic machines specially designed therefor B23G1/02on an external or internal cylindrical or conical surface, e.g. on recesses B23G1/16, B23G1/22, B23G1/32, B23G1/36 take precedence B23G1/04Machines with one working-spindle B23G1/06specially adapted for making conical screws, e.g. wood-screws B23G1/08Machines with a plurality of working spindles B23G1/10specially adapted for making conical screws, e.g. wood-screws B23G1/12Machines 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 B23G1/14specially adapted for making conical screws, e.g. wood-screws B23G1/16in holes of workpieces by taps B23G1/26, B23G1/32, B23G1/36 take precedence B23G1/18Machines with one working spindle B23G1/185specially adapted for making nuts B23G1/20Machines with a plurality of working spindles B23G1/205specially adapted for making nuts B23G1/22Machines specially designed for operating on pipes or tubes B23G1/225automatically controlled B23G1/24portable B23G1/26Manually-operated thread-cutting devices features of the threading tool per se B23G5/00 B23G1/261Die and tap wrenches lubricating and cooling devices therefor B23G5/005; B23G1/265 takes precedence B23G1/262Tap wrenches having a V slot B23G1/264 takes precedence B23G1/263Die wrenches having a cylindrical opening and a clamping screw B23G1/264comprising tap wrench features with a V slot B23G1/265Die and tap wrenches with a guiding part lubricating and cooling devices therefor B23G5/005 B23G1/266Tap wrenches having a V slot B23G1/268 takes precedence B23G1/267Die wrenches having a cylindrical opening and a clamping screw B23G1/268comprising tap wrench features with a V slot B23G1/28with means for adjusting the threading tool B23G1/30without means for adjusting the threading tool, e.g. with die-stock tap wrenches B25B B23G1/32by milling B23G1/34with a cutting bit moving in a closed path arranged eccentrically with respect to the axis of the rotating workpieces B23G1/36by grinding B23G1/38with grinding discs guided along the workpiece in accordance with the pitch of the required thread B23G1/40with grinding discs guided radially to the workpiece B23G1/42Centreless grinding B23G1/44Equipment or accessories specially designed for machines or devices for thread cutting B23G1/46for holding the threading tools B23B31/083 takes precedence B23G1/465comprising arrangements for reversing the rotation of the tool B23G1/48for guiding the threading tools B23G1/50for cutting thread by successive operations B23G1/52for operating on pipes or tubes B23G3/00Arrangements 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 B23G3/005for enabling presses to be used for thread cutting B23G3/02for withdrawing or resetting the threading tool B23G3/04for repeatedly setting the threading tool in a predetermined working position B23G3/06for compensating inaccuracies in the pitch of the lead-screw B23G3/08for advancing or controlling the threading tool or the work by templates, cams, or the like B23G3/10for cutting thread of variable pitch B23G3/12for using several adjacently-arranged threading tools, e.g. using several chasers B23G3/14for cutting thread of conical shape B23G5/00Thread-cutting toolsDie-heads B23G5/005with lubrication or cooling devices B23G5/02without means for adjustment B23G5/04Dies B23G5/043with guiding means B23G5/046for conical thread B23G5/06Taps chucks therefor B23B31/00 B23G5/062with a guiding means part B23G5/064with weakened shank portion B23G5/066with stops B23G5/068with means for removing the broken tap B23G5/08with means for adjustment B23G5/083Adjustable dies B23G5/086with guiding means B23G5/10Die-heads B23G5/103with guiding means B23G5/106Collet-type die-heads B23G5/12self-releasing B23G5/14Tapping-heads B23G5/16self-releasing B23G5/18Milling cutters B23G5/182combined with other tools B23G5/184combined with drills B23G5/188 takes precedence B23G5/186combined with chamfering tools B23G5/188and with drills B23G5/20combined with other tools, e.g. drills B23G5/182 takes precedence; screws which drill and tap F16B25/00 B23G7/00Forming 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 B23G7/02Tools for this purpose B23G9/00Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanksFinishing, e.g. polishing, any screw-thread B23G9/001Working screws B23G9/002Slotting screw heads or shanks B23G9/003Deburring screws B23G9/004Finishing screws B23G9/003 takes precedence B23G9/005Working nuts B23G9/006Slotting nuts B23G9/007Deburring nuts B23G9/008Finishing nuts B23G9/007 takes precedence B23G9/009Thread cleaning or repairing B23G11/00Feeding 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 B23G2200/00 B23G2200/00Details of threading tools B23G2200/02Tools in which the shank and the cutting part are made from different materials or from separate components B23G2200/04Tools with negative cutting angles B23G2200/06Connections between parts of threading tools B23G2200/062Brazed connections B23G2200/065Glued connections B23G2200/067Welded connections B23G2200/08Threading tools with adjustable elements manually operated thread cutting devices with means for adjusting the threading tool B23G1/28 B23G2200/10Threading tools comprising cutting inserts B23G2200/12Threading tools comprising inserts for thread forming B23G2200/14Multifunctional threading tools B23G2200/141Tools comprising means for deburring B23G2200/142Tools comprising means for forming threads by deformation B23G2200/143Tools comprising means for drilling B23G2200/144Tools comprising a die B23G2200/145Tools comprising means for milling features other than the thread B23G2200/146Tools comprising a tap B23G2200/147Tools comprising means for reaming B23G2200/148Tools having means for countersinking B23G2200/16Tools with cutting edges spaced unequally around the circumference B23G2200/18Tools rotatable in both directions B23G2200/20Tools having a brush B23G2200/22Tools having an end cap, e.g. for the distribution of cutting fluid B23G2200/24Chip breakers B23G2200/26Coatings of tools B23G2200/28Threading tools having a conical form B23G2200/30Cutting edges that are rounded in the cross-sectional view of the cutting edge B23G2200/32Tools having a decreasing diameter in the direction of the shank from the tip B23G2200/34Tools having an increasing diameter in the direction of the shank from the tip B23G2200/28 takes precedence B23G2200/36Tools having provision to produce threads of more than one type or size B23G2200/38Tools with shanks having a working end at each end of the shank B23G2200/40Tools with variable or different helix angles B23G2200/42Hollow tools B23G2200/44Taps with more than one threading section, the threading sections being axially spaced from one another B23G2200/46Tools having a section of polygonal form, e.g. for the transmission of torque B23G2200/48Spiral grooves, i.e. spiral flutes B23G2200/50Tools in which the pitch of the teeth is a multiple of the pitch of the thread being produced B23G2210/00Details of threads produced B23G2210/04Internal threads B23G2210/08External threads B23G2210/12Threads having a large diameter B23G2210/16Multiple start threads B23G2210/21Threads in nuts B23G2210/24Threads having a variable pitch B23G2210/28Threads having a rounded profile B23G2210/36Threads having a square profile B23G2210/41Threads having a stepped profile B23G2210/44Threads having a trapezoidal profile B23G2210/48Threads having a special form or profile not otherwise provided for B23G2225/00Materials of threading tools, workpieces or other structural elements B23G2225/04Cubic boron nitride B23G2225/08Cermets B23G2225/12Chromium B23G2225/16Diamond B23G2225/165Polycrystalline diamond B23G2225/24Elastomers, e.g. rubber B23G2225/28Hard metal, i.e. cemented carbides B23G2225/32High speed steel B23G2225/36Molybdenum disulphide B23G2225/40Plastics not otherwise provided for B23G2225/44Titanium B23G2225/48Titanium aluminium nitride (TiAlN) B23G2225/52Titanium carbide B23G2225/56Titanium carbide nitride (TiCN) B23G2225/60Titanium nitride B23G2240/00Details of equipment for threading other than threading tools, details of the threading process B23G2240/04Compensation of centrifugal force B23G2240/08Evacuation of chips or fines B23G2240/12Means for cooling or lubrication B23G2240/16Equipment for producing threaded component with a rotating disc to hold the components B23G2240/20Guiding devices with a pin affixable in a drilling chuck and with free rotation of the threading tool holder with respect to the pin B23G2240/24Guides for threading tools having a V-groove for location on cylindrical workpieces B23G2240/28Indication scales B23G2240/32Threading devices designed to be mounted in the tailstock of a lathe B23G2240/36Methods of threading not otherwise provided for B23G2240/40Threading equipment having an integrally incorporated driving motor B23G2240/44Tap or die wrenches with multiple locations for holding threading tools, e.g. for holding threading tools of different sizes B23G2240/48Protective sleeves for taps B23G2240/52Sensors B23G2240/56Producing or refurbishing threads for spark plugs or glow plugs B23G2240/60Thread 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