|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

SHAPING

|  | B21 |
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy Fulltext... Hierarchy... Expanded...B22; shearing Fulltext... Hierarchy... Expanded...B23D; working of metal by the action of a high concentration of electric current Fulltext... Hierarchy... Expanded...B23H; soldering, welding, flame-cutting Fulltext... Hierarchy... Expanded...B23K; other working of metal Fulltext... Hierarchy... Expanded...B23P; punching sheet material in general Fulltext... Hierarchy... Expanded...B26F; processes for changing of physical properties of metals Fulltext... Hierarchy... Expanded...C21D, Fulltext... Hierarchy... Expanded...C22F; electroforming Fulltext... Hierarchy... Expanded...C25D 1/00)

|  | B21 |
Note(s) This class does not cover: combinations of operations covered by different subclasses of class Fulltext... Hierarchy... Expanded...B21, which are covered by subclass Fulltext... Hierarchy... Expanded...B23P; combinations of operations covered by any particular subclass of class Fulltext... Hierarchy... Expanded...B21 with operations covered by other classes, e.g. with operations involving removal of material, which are also covered by subclass Fulltext... Hierarchy... Expanded...B23P, except that if the operations covered by the other classes are subsidiary to the operations properly covered by a single subclass of Fulltext... Hierarchy... Expanded...B21 the combination is classified in that subclass. Processes of a kind covered by this class but applied to non-metallic materials are classified in this class if they are applicable to metal and cannot be classified fully in another class.

|  | B21K |
MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, WHEELS (making particular articles by working sheet metal without essentially removing material Fulltext... Hierarchy... Expanded...B21D; processing wire Fulltext... Hierarchy... Expanded...B21F; making pins, needles or nails Fulltext... Hierarchy... Expanded...B21G; making particular articles by rolling Fulltext... Hierarchy... Expanded...B21H; forging machines, pressing machines, hammering machines, in general Fulltext... Hierarchy... Expanded...B21J; making chains Fulltext... Hierarchy... Expanded...B21L; plating Fulltext... Hierarchy... Expanded...B23K)

|  | B21K |
Note(s) This subclass covers only forging, pressing, or hammering operations which are specially adapted for use in the manufacture of particular objects and which are not essentially combined with any different metal-working operation unless the latter is a subsidiary operation performed in the same machine.

|  | B21K |
Subclass index
MAKING MACHINE ELEMENTS OR TOOLS | 1/00, 3/00, 5/00, 19/00
MAKING RAILS | 7/00, 9/00
MAKING LOCKSMITHS' OR BLACKSMITHS' GOODS | 13/00, 15/00
MAKING OTHER ARTICLES | 7/00, 11/00, 17/00, 21/00, 23/00
UNITING OF COMPONENTS | 25/00
ACCESSORIES, AUXILIARY DEVICES | 27/00, 29/00, 31/00

|  | B21K 1/00 - B21K 25/00 |
Making particular articles by forging, pressing, or hammering; Equipment therefor

|  | B21K 1/00 |
Making machine elements

|  | B21K 1/02 |
· | balls, rolls, or rollers, e.g. for bearings

|  | B21K 1/04 |
· | ball-races

|  | B21K 1/05 |
· | cages for bearings [2]

|  | B21K 1/06 |
· | axles or shafts

|  | B21K 1/08 |
· · | crankshafts

|  | B21K 1/10 |
· · | of cylindrical form

|  | B21K 1/12 |
· · | of specially-shaped cross-section

|  | B21K 1/14 |
· | fittings

|  | B21K 1/16 |
· · | parts of pipe or hose couplings

|  | B21K 1/18 |
· | pistons or plungers

|  | B21K 1/20 |
· | valve parts

|  | B21K 1/22 |
· · | poppet valves, e.g. for internal-combustion engines

|  | B21K 1/24 |
· · | valve bodies; valve seats

|  | B21K 1/26 |
· | housings or supporting parts, e.g. axle housings, engine mountings

|  | B21K 1/28 |
· | wheels; discs

|  | B21K 1/30 |
· · | with gear-teeth

|  | B21K 1/32 |
· · | discs, e.g. disc wheels

|  | B21K 1/34 |
· · | wheels with spokes

|  | B21K 1/36 |
· · | with blades

|  | B21K 1/38 |
· · | rims; tyres

|  | B21K 1/40 |
· · | hubs

|  | B21K 1/42 |
· · | pulleys, e.g. cable pulleys

|  | B21K 1/44 |
· | bolts, studs, or the like (making screw-thread Fulltext... Hierarchy... Expanded...B21K 1/56; making U-bolts Fulltext... Hierarchy... Expanded...B21K 1/74)

|  | B21K 1/46 |
· · | with heads

|  | B21K 1/48 |
· · · | Machines working with hammers, e.g. beating in a radial direction, for forming heads

|  | B21K 1/50 |
· · · | Trimming or shearing formed heads, e.g. working with dies

|  | B21K 1/52 |
· · | double-ended, e.g. with heads on both ends (forming heads Fulltext... Hierarchy... Expanded...B21K 1/46)

|  | B21K 1/54 |
· · | with grooves or notches

|  | B21K 1/56 |
· | screw-threaded elements [2]

|  | B21K 1/58 |
· | rivets

|  | B21K 1/60 |
· · | hollow or semi-hollow rivets

|  | B21K 1/62 |
· · | special rivets, e.g. with electrical contacts

|  | B21K 1/64 |
· | nuts (making screw-thread Fulltext... Hierarchy... Expanded...B21K 1/56)

|  | B21K 1/66 |
· · | from strip bars

|  | B21K 1/68 |
· · | from round or profiled bars

|  | B21K 1/70 |
· · | of special shape, e.g. self-locking nuts, wing nuts

|  | B21K 1/72 |
· | hooks, e.g. crane hooks, railway track spikes (making nails in general Fulltext... Hierarchy... Expanded...B21G)

|  | B21K 1/74 |
· | forked members or members with two or more limbs, e.g. U-bolts, anchors

|  | B21K 1/76 |
· | elements not mentioned in one of the preceding groups

|  | B21K 3/00 |
Making engine or like machine parts not covered by subgroups of Fulltext... Hierarchy... Expanded...B21K 1/00; Making propellers or the like

|  | B21K 3/02 |
· | cylinder heads

|  | B21K 3/04 |
· | blades, e.g. for turbines; Upsetting of blade roots

|  | B21K 5/00 |
Making tools or tool parts, e.g. pliers

|  | B21K 5/02 |
· | drilling-tools or other tools for making or working on holes

|  | B21K 5/04 |
· · | twisting-tools, e.g. drills, reamers

|  | B21K 5/06 |
· · | Dressing, e.g. sharpening rock drills

|  | B21K 5/08 |
· · | drifting tools

|  | B21K 5/10 |
· · | Forming drill-bit shanks

|  | B21K 5/12 |
· | other cutting tools (cutlery wares Fulltext... Hierarchy... Expanded...B21K 11/00)

|  | B21K 5/14 |
· | hand hammers

|  | B21K 5/16 |
· | tools for turning nuts

|  | B21K 5/18 |
· | handles or parts therefor

|  | B21K 5/20 |
· | Making working faces of dies, either recessed or outstanding

|  | B21K 7/00 |
Making railway appurtenances; Making vehicle parts

|  | B21K 7/02 |
· | parts for permanent way (spikes Fulltext... Hierarchy... Expanded...B21K 1/72)

|  | B21K 7/04 |
· · | switch tongues

|  | B21K 7/06 |
· · | sleepers

|  | B21K 7/08 |
· · | base plates for rails, e.g. chairs

|  | B21K 7/10 |
· · | rail joints

|  | B21K 7/12 |
· | parts for locomotives or vehicles, e.g. frames, underframes

|  | B21K 7/14 |
· · | brake rigging or brake parts [2]

|  | B21K 9/00 |
Reconditioning railroad accessories, e.g. rails

|  | B21K 11/00 |
Making cutlery wares; Making garden tools or the like

|  | B21K 11/02 |
· | knives

|  | B21K 11/04 |
· | spoons; table forks

|  | B21K 11/06 |
· | scissors

|  | B21K 11/08 |
· | sickles; scythes

|  | B21K 11/10 |
· | axes; picks

|  | B21K 11/12 |
· | spades; shovels

|  | B21K 11/14 |
· | rakes; garden forks

|  | B21K 13/00 |
Making locksmiths' goods, e.g. handles for cases

|  | B21K 13/02 |
· | hinges

|  | B21K 15/00 |
Making blacksmiths' goods

|  | B21K 15/02 |
· | horse-shoes; accessories therefor

|  | B21K 15/04 |
· · | caulks

|  | B21K 15/06 |
· | metal attachments for footwear, e.g. wear-resisting plates

|  | B21K 17/00 |
Making sport articles, e.g. skates

|  | B21K 19/00 |
Making articles for agricultural machinery

|  | B21K 19/02 |
· | plough blades; ploughshares

|  | B21K 21/00 |
Making hollow articles not covered by a single preceding subgroup (essentially from sheet-metal or uniform thin-walled tubes Fulltext... Hierarchy... Expanded...B21D, e.g. Fulltext... Hierarchy... Expanded...B21D 41/00, Fulltext... Hierarchy... Expanded...B21D 51/00)

|  | B21K 21/02 |
· | Producing blanks in the shape of discs or cups as semi-finished articles for making hollow articles, e.g. to be deep-drawn or extruded

|  | B21K 21/04 |
· | Shaping thin-walled hollow articles, e.g. cartridges

|  | B21K 21/06 |
· | Shaping thick-walled hollow articles, e.g. projectiles

|  | B21K 21/08 |
· | Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs

|  | B21K 21/10 |
· · | cone-shaped or bell-shaped articles, e.g. insulator caps

|  | B21K 21/12 |
· | Shaping end portions of hollow articles

|  | B21K 21/14 |
· · | closed or substantially-closed ends, e.g. cartridge bottoms

|  | B21K 21/16 |
· | Remodelling hollow bodies with respect to the shape of the cross-section (remodelling end portions only Fulltext... Hierarchy... Expanded...B21K 21/12)

|  | B21K 23/00 |
Making other articles

|  | B21K 23/02 |
· | members of endless tracks, e.g. track guides, shoes (making from sheet-metal Fulltext... Hierarchy... Expanded...B21D)

|  | B21K 23/04 |
· | flanged articles (Fulltext... Hierarchy... Expanded...B21K 1/28 takes precedence; flanging tubes Fulltext... Hierarchy... Expanded...B21D)

|  | B21K 25/00 |
Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components (uniting by interference- or press-fitting Fulltext... Hierarchy... Expanded...B23P 11/02, Fulltext... Hierarchy... Expanded...B23P 19/02)

|  | B21K 27/00 - B21K 31/00 |
Accessories; Auxiliary devices

|  | B21K 27/00 |
Handling devices, e.g. for feeding, aligning, discharging; Cutting-off means; Arrangement thereof

|  | B21K 27/02 |
· | Feeding devices for rods, wire, or strips

|  | B21K 27/04 |
· · | allowing successive working steps

|  | B21K 27/06 |
· | Cutting-off means; Arrangement thereof

|  | B21K 29/00 |
Arrangements for heating or cooling during processing (for preparing metal stock to be forged or pressed Fulltext... Hierarchy... Expanded...B21J 1/06; heating equipment in general, see the appropriate subclasses, e.g. Fulltext... Hierarchy... Expanded...H05B)

|  | B21K 31/00 |
Control devices specially adapted for positioning tool carriers