B21K1/00	7	Making machine elements	B21K1/00	B21K1/00		151
B21K1/02	8	balls, rolls, or rollers, e.g. for bearings	B21K1/02	B21K1/02		341
B21K1/025	9	{of bullets}	B21K1/02	B21K1/02		69
B21K1/04	8	ball-races {or sliding bearing races}	B21K1/04	B21K1/04		582
B21K1/05	8	cages for bearings	B21K1/05	B21K1/05		101
B21K1/06	8	axles or shafts	B21K1/06	B21K1/06		669
B21K1/063	9	{hollow (hollow racks B21K1/768)}	B21K1/06	B21K1/06		307
B21K1/066	9	{splined}	B21K1/06	B21K1/06		160
B21K1/08	9	crankshafts	B21K1/08	B21K1/08		643
B21K1/10	9	of cylindrical form	B21K1/10	B21K1/10		223
B21K1/12	9	of specially-shaped cross-section	B21K1/12	B21K1/12		399
B21K1/14	8	fittings	B21K1/14	B21K1/14		303
B21K1/16	9	parts of pipe or hose couplings	B21K1/16	B21K1/16		250
B21K1/18	8	pistons or plungers	B21K1/18	B21K1/18		300
B21K1/185	9	{with cooling channels}	B21K1/18	B21K1/18		63
B21K1/20	8	valve parts	B21K1/20	B21K1/20		228
B21K1/205	9	{rocker arms}	B21K1/20	B21K1/20		123
B21K1/22	9	poppet valves, e.g. for internal-combustion engines	B21K1/22	B21K1/22		328
B21K1/24	9	valve bodies; valve seats	B21K1/24	B21K1/24		289
B21K1/26	8	housings or supporting parts, e.g. axle housings, engine mountings	B21K1/26	B21K1/26		209
B21K1/28	8	wheels; discs	B21K1/28	B21K1/28		357
B21K1/30	9	with gear-teeth	B21K1/30	B21K1/30		1319
B21K1/305	10	{helical}	B21K1/30	B21K1/30		177
B21K1/32	9	discs, e.g. disc wheels	B21K1/32	B21K1/32		428
B21K1/34	9	wheels with spokes	B21K1/34	B21K1/34		46
B21K1/36	9	with blades	B21K1/36	B21K1/36		100
B21K1/38	9	rims; tyres	B21K1/38	B21K1/38		117
B21K1/40	9	hubs	B21K1/40	B21K1/40		334
B21K1/42	9	pulleys, e.g. cable pulleys	B21K1/42	B21K1/42		91
B21K1/44	8	bolts, studs, or the like (making screw-thread B21K1/56; making U-bolts B21K1/74)	B21K1/44	B21K1/44		657
B21K1/46	9	with heads	B21K1/46	B21K1/46		1229
B21K1/463	10	{with recessed heads}	B21K1/46	B21K1/46		308
B21K1/466	10	{Heading machines with an oscillating die block}	B21K1/46	B21K1/46		153
B21K1/48	10	Machines working with hammers, e.g. beating in a radial direction, for forming heads	B21K1/48	B21K1/48		63
B21K1/50	10	Trimming or shearing formed heads, e.g. working with dies	B21K1/50	B21K1/50		128
B21K1/52	9	double-ended, e.g. with heads on both ends (forming heads B21K1/46)	B21K1/52	B21K1/52		44
B21K1/54	9	with grooves or notches	B21K1/54	B21K1/54		114
B21K1/56	8	screw-threaded elements	B21K1/56	B21K1/56		616
B21K1/58	8	rivets	B21K1/58	B21K1/58		220
B21K1/60	9	hollow or semi-hollow rivets	B21K1/60	B21K1/60		324
B21K1/62	9	special rivets, e.g. with electrical contacts	B21K1/62	B21K1/62		111
B21K1/64	8	nuts (making screw-thread B21K1/56)	B21K1/64	B21K1/64		806
B21K1/66	9	from strip bars	B21K1/66	B21K1/66		54
B21K1/68	9	from round or profiled bars	B21K1/68	B21K1/68		144
B21K1/70	9	of special shape, e.g. self-locking nuts, wing nuts	B21K1/70	B21K1/70		130
B21K1/701	10	{Weld nuts}	B21K1/70	B21K1/70		44
B21K1/702	10	{Clinch nuts}	B21K1/70	B21K1/70		73
B21K1/704	10	{Cap nuts}	B21K1/70	B21K1/70		49
B21K1/705	10	{Castellated nuts}	B21K1/70	B21K1/70		35
B21K1/707	10	{Self-locking nuts}	B21K1/70	B21K1/70		311
B21K1/708	10	{wing nuts}	B21K1/70	B21K1/70		25
B21K1/72	8	hooks, e.g. crane hooks, railway track spikes (making nails in general B21G)	B21K1/72	B21K1/72		80
B21K1/74	8	forked members or members with two or more limbs, e.g. U-bolts, anchors	B21K1/74	B21K1/74		261
B21K1/76	8	elements not mentioned in one of the preceding groups	B21K1/76	B21K1/76		477
B21K1/761	9	{rings}	B21K1/76	B21K1/76		493
B21K1/762	9	{Coupling members for conveying mechanical motion, e.g. universal joints}	B21K1/76	B21K1/76		428
B21K1/763	10	{Inner elements of coupling members}	B21K1/76	B21K1/76		48
B21K1/765	10	{Outer elements of coupling members}	B21K1/76	B21K1/76		215
B21K1/766	9	{Connecting rods}	B21K1/76	B21K1/76		192
B21K1/767	9	{Toothed racks}	B21K1/76	B21K1/76		215
B21K1/768	10	{hollow}	B21K1/76	B21K1/76		137
B21K3/00	7	Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like	B21K3/00	B21K3/00		200
B21K3/02	8	cylinder heads	B21K3/02	B21K3/02		21
B21K3/04	8	blades, e.g. for turbines; Upsetting of blade roots	B21K3/04	B21K3/04		499
B21K5/00	7	Making tools or tool parts, e.g. pliers	B21K5/00	B21K5/00		166
B21K5/02	8	drilling-tools or other for making or working on holes	B21K5/02	B21K5/02		147
B21K5/04	9	twisting-tools, e.g. drills, reamers	B21K5/04	B21K5/04		163
B21K5/06	9	Dressing, e.g. sharpening rock drills	B21K5/06	B21K5/06		404
B21K5/08	9	drifting tools	B21K5/08	B21K5/08		10
B21K5/10	9	Forming drill-bit shanks	B21K5/10	B21K5/10		36
B21K5/12	8	other cutting tools (cutlery wares B21K11/00)	B21K5/12	B21K5/12		159
B21K5/14	8	hand hammers	B21K5/14	B21K5/14		19
B21K5/16	8	tools for turning nuts	B21K5/16	B21K5/16		131
B21K5/18	8	handles or parts therefor	B21K5/18	B21K5/18		7
B21K5/20	8	Making working faces of dies, either recessed or outstanding	B21K5/20	B21K5/20		178
B21K7/00	7	Making railway appurtenances; Making vehicle parts	B21K7/00	B21K7/00		49
B21K7/02	8	parts for permanent way (spikes B21K1/72)	B21K7/02	B21K7/02		89
B21K7/04	9	switch tongues	B21K7/04	B21K7/04		16
B21K7/06	9	sleepers	B21K7/06	B21K7/06		48
B21K7/08	9	base plates for rails, e.g. chairs	B21K7/08	B21K7/08		65
B21K7/10	9	rails joints	B21K7/10	B21K7/10		16
B21K7/12	8	parts for locomotives or vehicles, e.g. frames, underframes	B21K7/12	B21K7/12		452
B21K7/14	9	brake rigging or brake parts	B21K7/14	B21K7/14		190
B21K9/00	7	Reconditioning railroad accessories, e.g. rails	B21K9/00	B21K9/00		161
B21K11/00	7	Making cutlery wares; Making garden tools or the like	B21K11/00	B21K11/00		83
B21K11/02	8	knives	B21K11/02	B21K11/02		120
B21K11/04	8	spoons; table forks	B21K11/04	B21K11/04		39
B21K11/06	8	scissors	B21K11/06	B21K11/06		54
B21K11/08	8	sickles; scythes	B21K11/08	B21K11/08		13
B21K11/10	8	axes; picks	B21K11/10	B21K11/10		18
B21K11/12	8	spades; shovels	B21K11/12	B21K11/12		16
B21K11/14	8	rakes; garden forks	B21K11/14	B21K11/14		13
B21K13/00	7	Making locksmiths&apos; goods, e.g. handles for cases	B21K13/00	B21K13/00		31
B21K13/02	8	hinges	B21K13/02	B21K13/02		71
B21K15/00	7	Making blacksmiths&apos; goods	B21K15/00	B21K15/00		33
B21K15/02	8	horseshoes; appurtenances therefor	B21K15/02	B21K15/02		441
B21K15/04	9	caulks	B21K15/04	B21K15/04		25
B21K15/06	8	metal attachments for footwear, e.g. wearresisting plates	B21K15/06	B21K15/06		9
B21K17/00	7	Making sport articles, e.g. skates	B21K17/00	B21K17/00		156
B21K19/00	7	Making articles for agricultural machinery	B21K19/00	B21K19/00		99
B21K19/02	8	plough blades; ploughshares	B21K19/02	B21K19/02		23
B21K21/00	7	Making hollow articles not covered by a single preceding sub-group (essentially from sheet-metal or uniform thin-walled tubes B21D, e.g. B21D41/00, B21D51/00)	B21K21/00	B21K21/00		315
B21K21/02	8	Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles, e.g. to be deep-drawn or extruded	B21K21/02	B21K21/02		127
B21K21/04	8	Shaping thin-walled hollow articles, e.g. cartridges	B21K21/04	B21K21/04		219
B21K21/06	8	Shaping thick-walled hollow articles, e.g. projectiles	B21K21/06	B21K21/06		236
B21K21/08	8	Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs	B21K21/08	B21K21/08		335
B21K21/10	9	cone-shaped or bell-shaped articles, e.g. insulator caps	B21K21/10	B21K21/10		66
B21K21/12	8	Shaping end portions of hollow articles	B21K21/12	B21K21/12		376
B21K21/14	9	closed or substantially-closed ends, e.g. cartridge bottoms	B21K21/14	B21K21/14		122
B21K21/16	8	Remodelling hollow bodies with respect to the shape of the cross-section (remodelling end portions only B21K21/12)	B21K21/16	B21K21/16		176
B21K23/00	7	Making other articles	B21K23/00	B21K23/00		747
B21K23/02	8	members of endless tracks, e.g. track guides, shoes (making from sheet-metal B21D)	B21K23/02	B21K23/02		75
B21K23/04	8	flanged articles (B21K1/28 takes precedence; flanging tubes B21D)	B21K23/04	B21K23/04		265
B21K25/00	7	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 B23P11/02, B21K19/02)	B21K25/00	B21K25/00		1492
B21K25/005	8	{by friction heat forging (B21J15/027 takes precedence; friction heat forging per seB21J5/063)}	B21K25/00	B21K25/00		72
B21K27/00	7	Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof	B21K27/00	B21K27/00		1057
B21K27/02	8	Feeding devices for rods, wire, or strips	B21K27/02	B21K27/02		557
B21K27/04	9	allowing successive working steps	B21K27/04	B21K27/04		508
B21K27/06	8	Cutting-off means; Arrangements thereof	B21K27/06	B21K27/06		729
B21K29/00	7	Arrangements for heating or cooling during processing (for preparing metal stock to be forged or pressed B21J1/06; heating equipment per se, see the appropriate classes, e.g. H05B)	B21K29/00	B21K29/00		1913
B21K31/00	7	Control devices specially adapted for positioning tool carriers	B21K31/00	B21K31/00		64
