4 files changed, +520 −52 2.0.0: Face recesses removed: the model is now the exact d x D x B envelope with flush shields and seals (the recess depths and ring face widths came from no catalogue).

part.py +60 −46

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		@@ -1,57 +1,71 @@
1		-"""Deep groove ball bearing, shielded (2Z), ISO 15 boundary dimensions.
2		-Envelope: inner and outer rings and two recessed shields (four bodies; the balls behind the shields aren't modelled).
3		-Centred on the origin with its axis along Z.
	1	+"""Deep groove ball bearing, single row, metric: miniature (6xx, MR), 60, 62, 63, 68 and 69 series, open, shielded
	2	+(ZZ) or sealed (2RS), optionally with a flange on the outer ring.
4	3
5		-Material: rings in through-hardened high-carbon bearing steel (C60 from the material library, the closest it has to 100Cr6 / AISI 52100), ground; shields in cold-rolled steel (DC01)."""
	4	+Envelope model for assemblies: one solid with the boundary dimensions (bore d, outside diameter D, width B) and, when
	5	+flanged, the flange (diameter D1, width C1) flush with the bottom face. The faces are flat (shields and seals flush with the
	6	+ring faces); rolling elements, cage and the gap between the rings are not modelled, since no catalogue dimension
	7	+gives them. Centred on the origin, axis along Z; the faces are at z = +-B/2.
	8	+"""
6	9	from steve import Model
7	10
8		-designation = "608" # Bearing designation
	11	+designation = "608" # Bearing designation (basic number)
	12	+closure = "zz" # Shields / seals
	13	+flanged = False # Flange on the outer ring
9	14
10		-# designation: (bore d, outside diameter D, width B)
	15	+# designation: (bore d, outside diameter D, width B open, width B shielded or sealed)
	16	+# ISO 15:2017 boundary dimensions (dimension series; preview https://cdn.standards.iteh.ai/samples/69977/9ac39b8b79a94b74b35cba8868eabe4f/ISO-15-2017.pdf);
	17	+# per bearing number from NTN "Ball and Roller Bearings" CAT. No. 2203-3/E, pp. B-22 to B-27 (60, 62, 63, 68, 69
	18	+# series) and B-48 to B-51 (miniature: 623 to 629, 688A, MR85 = 675, MR95), https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf;
	19	+# MR85 / MR95 / 688A also NSK's online catalogue (open and shielded widths differ).
11	20	BEARINGS = {
12		- '623': (3, 10, 4),
13		- '624': (4, 13, 5),
14		- '625': (5, 16, 5),
15		- '626': (6, 19, 6),
16		- '608': (8, 22, 7),
17		- '688': (8, 16, 5),
18		- '6000': (10, 26, 8),
19		- '6001': (12, 28, 8),
20		- '6002': (15, 32, 9),
21		- '6003': (17, 35, 10),
22		- '6004': (20, 42, 12),
23		- '6200': (10, 30, 9),
24		- '6201': (12, 32, 10),
25		- '6202': (15, 35, 11),
26		- '6203': (17, 40, 12),
27		- '6204': (20, 47, 14),
	21	+ "623": (3, 10, 4, 4), "624": (4, 13, 5, 5), "625": (5, 16, 5, 5), "626": (6, 19, 6, 6),
	22	+ "627": (7, 22, 7, 7), "608": (8, 22, 7, 7), "629": (9, 26, 8, 8), "688": (8, 16, 4, 5),
	23	+ "MR85": (5, 8, 2, 2.5), "MR95": (5, 9, 2.5, 3),
	24	+ "6000": (10, 26, 8, 8), "6001": (12, 28, 8, 8), "6002": (15, 32, 9, 9), "6003": (17, 35, 10, 10),
	25	+ "6004": (20, 42, 12, 12), "6005": (25, 47, 12, 12), "6006": (30, 55, 13, 13), "6007": (35, 62, 14, 14),
	26	+ "6008": (40, 68, 15, 15), "6009": (45, 75, 16, 16), "6010": (50, 80, 16, 16),
	27	+ "6200": (10, 30, 9, 9), "6201": (12, 32, 10, 10), "6202": (15, 35, 11, 11), "6203": (17, 40, 12, 12),
	28	+ "6204": (20, 47, 14, 14), "6205": (25, 52, 15, 15), "6206": (30, 62, 16, 16), "6207": (35, 72, 17, 17),
	29	+ "6208": (40, 80, 18, 18), "6209": (45, 85, 19, 19), "6210": (50, 90, 20, 20),
	30	+ "6300": (10, 35, 11, 11), "6301": (12, 37, 12, 12), "6302": (15, 42, 13, 13), "6303": (17, 47, 14, 14),
	31	+ "6304": (20, 52, 15, 15), "6305": (25, 62, 17, 17), "6306": (30, 72, 19, 19), "6307": (35, 80, 21, 21),
	32	+ "6308": (40, 90, 23, 23), "6309": (45, 100, 25, 25), "6310": (50, 110, 27, 27),
	33	+ "6800": (10, 19, 5, 5), "6801": (12, 21, 5, 5), "6802": (15, 24, 5, 5), "6803": (17, 26, 5, 5),
	34	+ "6804": (20, 32, 7, 7), "6805": (25, 37, 7, 7), "6806": (30, 42, 7, 7), "6807": (35, 47, 7, 7),
	35	+ "6808": (40, 52, 7, 7), "6809": (45, 58, 7, 7), "6810": (50, 65, 7, 7),
	36	+ "6900": (10, 22, 6, 6), "6901": (12, 24, 6, 6), "6902": (15, 28, 7, 7), "6903": (17, 30, 7, 7),
	37	+ "6904": (20, 37, 9, 9), "6905": (25, 42, 9, 9), "6906": (30, 47, 9, 9), "6907": (35, 55, 10, 10),
	38	+ "6908": (40, 62, 12, 12), "6909": (45, 68, 12, 12), "6910": (50, 72, 12, 12),
28	39	}
29		-d, D, B = BEARINGS[designation]
30		-ring = (D - d) * 0.22 # radial thickness of each ring's face
31		-recess = min(0.4, B * 0.06) # shield face below the ring faces
32		-shield = max(0.2, min(0.6, B * 0.05)) # shield sheet thickness
33		-gap = min(0.15, ring * 0.1) # running clearance between a shield and the inner ring
	40	+# Sealed (2RS) widths that differ from the shielded width and aren't sourced: not offered.
	41	+NO_SEALED = ("MR85", "MR95")
	42	+# designation: (flange diameter D1, flange width C1 open, C1 shielded or sealed): NSK online catalogue (F623ZZ, F624ZZ,
	43	+# F625ZZ, F626ZZ1, F608ZZ, F688A, F688AZZ1) and NTN CAT. 2203-3/E p. B-50 (FL688A: C1 1.0 open, 1.1 shielded).
	44	+FLANGES = {
	45	+ "623": (11.5, 1.0, 1.0), "624": (15.0, 1.0, 1.0), "625": (18.0, 1.0, 1.0), "626": (22.0, 1.5, 1.5),
	46	+ "608": (25.0, 1.5, 1.5), "688": (18.0, 1.0, 1.1),
	47	+}
	48	+
	49	+if closure == "2rs" and designation in NO_SEALED:
	50	+ raise ValueError(f"{designation}: no sourced width for the sealed (2RS) version; choose open or zz.")
	51	+if flanged and designation not in FLANGES:
	52	+ raise ValueError(f"{designation}: no sourced flange dimensions; flanged sizes: {', '.join(FLANGES)}.")
	53	+d, D, b_open, b_closed = BEARINGS[designation]
	54	+B = b_open if closure == "open" else b_closed
34	55
35	56	model = Model()
36		-with model.sketch("outer_sketch", on="XY", name="Outer ring") as sk:
37		- sk.circle("outside", (0, 0), D / 2)
38		- sk.circle("inside", (0, 0), D / 2 - ring)
39		-model.extrude("outer_ring", "outer_sketch", distance=B, both=True, op="new", body="outer_ring") # B in all, centred
40		-with model.sketch("inner_sketch", on="XY", name="Inner ring") as sk:
41		- sk.circle("outside", (0, 0), d / 2 + ring)
	57	+with model.sketch("rings", on="XY", name="Rings") as sk:
	58	+ sk.circle("outer", (0, 0), D / 2)
42	59	sk.circle("bore", (0, 0), d / 2)
43		-model.extrude("inner_ring", "inner_sketch", distance=B, both=True, op="new", body="inner_ring")
44		-model.plane("shield_top_plane", on="XY", offset=B / 2 - recess, name="Top shield face")
45		-with model.sketch("shield_top_sketch", on="shield_top_plane", name="Top shield") as sk:
46		- sk.circle("out", (0, 0), D / 2 - ring)
47		- sk.circle("inn", (0, 0), d / 2 + ring + gap)
48		-model.extrude("shield_top", "shield_top_sketch", distance=-shield, op="new", body="shield_top")
49		-model.plane("shield_bottom_plane", on="XY", offset=-B / 2 + recess, name="Bottom shield face")
50		-with model.sketch("shield_bottom_sketch", on="shield_bottom_plane", name="Bottom shield") as sk:
51		- sk.circle("out", (0, 0), D / 2 - ring)
52		- sk.circle("inn", (0, 0), d / 2 + ring + gap)
53		-model.extrude("shield_bottom", "shield_bottom_sketch", distance=shield, op="new", body="shield_bottom")
54		-model.material("steel-1c60", finish="polished") # rings: hardened bearing steel
55		-model.material("steel-dc01", bodies=["shield_top", "shield_bottom"], finish="machined") # pressed steel shields
	60	+model.extrude("body", "rings", distance=B, both=True, name="Bearing")
	61	+model.plane("face_bottom", on="XY", offset=-B / 2, name="Bottom face")
	62	+if flanged:
	63	+ D1, c1_open, c1_closed = FLANGES[designation]
	64	+ C1 = c1_open if closure == "open" else c1_closed
	65	+ with model.sketch("flange_sketch", on="face_bottom", name="Flange") as sk:
	66	+ sk.circle("flange_out", (0, 0), D1 / 2)
	67	+ sk.circle("flange_in", (0, 0), D / 2)
	68	+ model.extrude("flange", "flange_sketch", distance=C1, name="Flange")
	69	+model.material("steel-generic", color="#b9bdc2")
56	70	result = model.result()
57	71

pypart.toml +25 −6

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		@@ -1,15 +1,34 @@
1	1	name = "steve/deep-groove-ball-bearing"
2		-version = "1.1.0"
	2	+version = "2.0.0"
3	3	runtime = "steve"
4	4	license = "MIT"
5		-summary = "Deep groove ball bearing (shielded), ISO 15 sizes 623 to 6204."
6		-description = "Deep groove ball bearing, shielded (2Z), ISO 15 boundary dimensions.\nEnvelope: inner and outer rings and two recessed shields (four bodies; the balls behind the shields aren't modelled).\nCentred on the origin with its axis along Z.\n\nMaterial: rings in through-hardened high-carbon bearing steel (C60 from the material library, the closest it has to 100Cr6 / AISI 52100), ground; shields in cold-rolled steel (DC01).\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."
7		-tags = ["bearing", "ball-bearing", "iso-15"]
8		-changes = "Materials and finishes: each part is made of its standard's engineering material, with its usual finish."
	5	+summary = "Deep groove ball bearing, metric: 6xx, MR, 60, 62, 63, 68 and 69 series, open, ZZ or 2RS, optional flange."
	6	+description = """Single-row deep groove ball bearing with ISO 15 boundary dimensions (bore d, outside diameter D, width B), \
	7	+open, shielded (ZZ) or sealed (2RS), optionally flanged (flange diameter D1, width C1 from the manufacturer's catalogue).
	8	+
	9	+Envelope geometry for assemblies: one solid with exactly the boundary dimensions, flat faces (shields and seals \
	10	+flush); balls, cage and the gap between the rings are not modelled. Centred on \
	11	+the origin with its axis along Z. Sources in the README."""
	12	+tags = ["bearing", "ball-bearing", "deep-groove", "iso-15", "metric", "flanged"]
	13	+changes = "Face recesses removed: the model is now the exact d x D x B envelope with flush shields and seals (the recess depths and ring face widths came from no catalogue)."
9	14
10	15	[parameters.designation]
11	16	type = "choice"
12	17	default = "608"
13		-choices = ["623", "624", "625", "626", "608", "688", "6000", "6001", "6002", "6003", "6004", "6200", "6201", "6202", "6203", "6204"]
	18	+choices = ["623", "624", "625", "626", "627", "608", "629", "688", "MR85", "MR95", "6000", "6001", "6002", "6003", "6004", "6005", "6006", "6007", "6008", "6009", "6010", "6200", "6201", "6202", "6203", "6204", "6205", "6206", "6207", "6208", "6209", "6210", "6300", "6301", "6302", "6303", "6304", "6305", "6306", "6307", "6308", "6309", "6310", "6800", "6801", "6802", "6803", "6804", "6805", "6806", "6807", "6808", "6809", "6810", "6900", "6901", "6902", "6903", "6904", "6905", "6906", "6907", "6908", "6909", "6910"]
14	19	label = "Designation"
	20	+description = "Basic bearing number (bore, outside diameter and width)."
15	21
	22	+[parameters.closure]
	23	+type = "choice"
	24	+default = "zz"
	25	+choices = ["open", "zz", "2rs"]
	26	+label = "Shields / seals"
	27	+description = "open, zz (metal shield on both sides, 2Z) or 2rs (rubber seal on both sides)."
	28	+
	29	+[parameters.flanged]
	30	+type = "boolean"
	31	+default = false
	32	+label = "Flanged outer ring"
	33	+description = "Flange on the outer ring (F-prefixed bearings: F623, F608, ...), flush with the bottom face."
	34	+

presets.toml added in 2.0.0

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		@@ -1,0 +1,359 @@
	1	+# Presets of this part (factory/PRESETS.md). Written by factory/gen.py.
	2	+
	3	+[[presets]]
	4	+id = "608"
	5	+title = "608"
	6	+params = { designation = "608", closure = "open", flanged = false }
	7	+aliases = ["608 bearing"]
	8	+standard = "ISO 15"
	9	+
	10	+[[presets]]
	11	+id = "608ZZ"
	12	+title = "608ZZ"
	13	+params = { designation = "608", closure = "zz", flanged = false }
	14	+aliases = ["608-2Z", "608ZZ bearing", "608ZZ"]
	15	+standard = "ISO 15"
	16	+
	17	+[[presets]]
	18	+id = "608-2RS"
	19	+title = "608-2RS"
	20	+params = { designation = "608", closure = "2rs", flanged = false }
	21	+aliases = ["608-2RS bearing"]
	22	+standard = "ISO 15"
	23	+
	24	+[[presets]]
	25	+id = "623"
	26	+title = "623"
	27	+params = { designation = "623", closure = "open", flanged = false }
	28	+aliases = ["623 bearing"]
	29	+standard = "ISO 15"
	30	+
	31	+[[presets]]
	32	+id = "623ZZ"
	33	+title = "623ZZ"
	34	+params = { designation = "623", closure = "zz", flanged = false }
	35	+aliases = ["623-2Z", "623ZZ bearing", "623ZZ"]
	36	+standard = "ISO 15"
	37	+
	38	+[[presets]]
	39	+id = "623-2RS"
	40	+title = "623-2RS"
	41	+params = { designation = "623", closure = "2rs", flanged = false }
	42	+aliases = ["623-2RS bearing"]
	43	+standard = "ISO 15"
	44	+
	45	+[[presets]]
	46	+id = "624"
	47	+title = "624"
	48	+params = { designation = "624", closure = "open", flanged = false }
	49	+aliases = ["624 bearing"]
	50	+standard = "ISO 15"
	51	+
	52	+[[presets]]
	53	+id = "624ZZ"
	54	+title = "624ZZ"
	55	+params = { designation = "624", closure = "zz", flanged = false }
	56	+aliases = ["624-2Z", "624ZZ bearing", "624ZZ"]
	57	+standard = "ISO 15"
	58	+
	59	+[[presets]]
	60	+id = "624-2RS"
	61	+title = "624-2RS"
	62	+params = { designation = "624", closure = "2rs", flanged = false }
	63	+aliases = ["624-2RS bearing"]
	64	+standard = "ISO 15"
	65	+
	66	+[[presets]]
	67	+id = "625"
	68	+title = "625"
	69	+params = { designation = "625", closure = "open", flanged = false }
	70	+aliases = ["625 bearing"]
	71	+standard = "ISO 15"
	72	+
	73	+[[presets]]
	74	+id = "625ZZ"
	75	+title = "625ZZ"
	76	+params = { designation = "625", closure = "zz", flanged = false }
	77	+aliases = ["625-2Z", "625ZZ bearing"]
	78	+standard = "ISO 15"
	79	+
	80	+[[presets]]
	81	+id = "625-2RS"
	82	+title = "625-2RS"
	83	+params = { designation = "625", closure = "2rs", flanged = false }
	84	+aliases = ["625-2RS bearing"]
	85	+standard = "ISO 15"
	86	+
	87	+[[presets]]
	88	+id = "626"
	89	+title = "626"
	90	+params = { designation = "626", closure = "open", flanged = false }
	91	+aliases = ["626 bearing"]
	92	+standard = "ISO 15"
	93	+
	94	+[[presets]]
	95	+id = "626ZZ"
	96	+title = "626ZZ"
	97	+params = { designation = "626", closure = "zz", flanged = false }
	98	+aliases = ["626-2Z", "626ZZ bearing"]
	99	+standard = "ISO 15"
	100	+
	101	+[[presets]]
	102	+id = "626-2RS"
	103	+title = "626-2RS"
	104	+params = { designation = "626", closure = "2rs", flanged = false }
	105	+aliases = ["626-2RS bearing"]
	106	+standard = "ISO 15"
	107	+
	108	+[[presets]]
	109	+id = "688"
	110	+title = "688"
	111	+params = { designation = "688", closure = "open", flanged = false }
	112	+aliases = ["688 bearing"]
	113	+standard = "ISO 15"
	114	+
	115	+[[presets]]
	116	+id = "688ZZ"
	117	+title = "688ZZ"
	118	+params = { designation = "688", closure = "zz", flanged = false }
	119	+aliases = ["688-2Z", "688ZZ bearing"]
	120	+standard = "ISO 15"
	121	+
	122	+[[presets]]
	123	+id = "688-2RS"
	124	+title = "688-2RS"
	125	+params = { designation = "688", closure = "2rs", flanged = false }
	126	+aliases = ["688-2RS bearing"]
	127	+standard = "ISO 15"
	128	+
	129	+[[presets]]
	130	+id = "6000"
	131	+title = "6000"
	132	+params = { designation = "6000", closure = "open", flanged = false }
	133	+aliases = ["6000 bearing"]
	134	+standard = "ISO 15"
	135	+
	136	+[[presets]]
	137	+id = "6000ZZ"
	138	+title = "6000ZZ"
	139	+params = { designation = "6000", closure = "zz", flanged = false }
	140	+aliases = ["6000-2Z", "6000ZZ bearing"]
	141	+standard = "ISO 15"
	142	+
	143	+[[presets]]
	144	+id = "6000-2RS"
	145	+title = "6000-2RS"
	146	+params = { designation = "6000", closure = "2rs", flanged = false }
	147	+aliases = ["6000-2RS bearing"]
	148	+standard = "ISO 15"
	149	+
	150	+[[presets]]
	151	+id = "6001"
	152	+title = "6001"
	153	+params = { designation = "6001", closure = "open", flanged = false }
	154	+aliases = ["6001 bearing"]
	155	+standard = "ISO 15"
	156	+
	157	+[[presets]]
	158	+id = "6001ZZ"
	159	+title = "6001ZZ"
	160	+params = { designation = "6001", closure = "zz", flanged = false }
	161	+aliases = ["6001-2Z", "6001ZZ bearing"]
	162	+standard = "ISO 15"
	163	+
	164	+[[presets]]
	165	+id = "6001-2RS"
	166	+title = "6001-2RS"
	167	+params = { designation = "6001", closure = "2rs", flanged = false }
	168	+aliases = ["6001-2RS bearing"]
	169	+standard = "ISO 15"
	170	+
	171	+[[presets]]
	172	+id = "6002"
	173	+title = "6002"
	174	+params = { designation = "6002", closure = "open", flanged = false }
	175	+aliases = ["6002 bearing"]
	176	+standard = "ISO 15"
	177	+
	178	+[[presets]]
	179	+id = "6002ZZ"
	180	+title = "6002ZZ"
	181	+params = { designation = "6002", closure = "zz", flanged = false }
	182	+aliases = ["6002-2Z", "6002ZZ bearing"]
	183	+standard = "ISO 15"
	184	+
	185	+[[presets]]
	186	+id = "6002-2RS"
	187	+title = "6002-2RS"
	188	+params = { designation = "6002", closure = "2rs", flanged = false }
	189	+aliases = ["6002-2RS bearing"]
	190	+standard = "ISO 15"
	191	+
	192	+[[presets]]
	193	+id = "6003"
	194	+title = "6003"
	195	+params = { designation = "6003", closure = "open", flanged = false }
	196	+aliases = ["6003 bearing"]
	197	+standard = "ISO 15"
	198	+
	199	+[[presets]]
	200	+id = "6003ZZ"
	201	+title = "6003ZZ"
	202	+params = { designation = "6003", closure = "zz", flanged = false }
	203	+aliases = ["6003-2Z", "6003ZZ bearing"]
	204	+standard = "ISO 15"
	205	+
	206	+[[presets]]
	207	+id = "6003-2RS"
	208	+title = "6003-2RS"
	209	+params = { designation = "6003", closure = "2rs", flanged = false }
	210	+aliases = ["6003-2RS bearing"]
	211	+standard = "ISO 15"
	212	+
	213	+[[presets]]
	214	+id = "6200"
	215	+title = "6200"
	216	+params = { designation = "6200", closure = "open", flanged = false }
	217	+aliases = ["6200 bearing"]
	218	+standard = "ISO 15"
	219	+
	220	+[[presets]]
	221	+id = "6200ZZ"
	222	+title = "6200ZZ"
	223	+params = { designation = "6200", closure = "zz", flanged = false }
	224	+aliases = ["6200-2Z", "6200ZZ bearing"]
	225	+standard = "ISO 15"
	226	+
	227	+[[presets]]
	228	+id = "6200-2RS"
	229	+title = "6200-2RS"
	230	+params = { designation = "6200", closure = "2rs", flanged = false }
	231	+aliases = ["6200-2RS bearing"]
	232	+standard = "ISO 15"
	233	+
	234	+[[presets]]
	235	+id = "6201"
	236	+title = "6201"
	237	+params = { designation = "6201", closure = "open", flanged = false }
	238	+aliases = ["6201 bearing"]
	239	+standard = "ISO 15"
	240	+
	241	+[[presets]]
	242	+id = "6201ZZ"
	243	+title = "6201ZZ"
	244	+params = { designation = "6201", closure = "zz", flanged = false }
	245	+aliases = ["6201-2Z", "6201ZZ bearing"]
	246	+standard = "ISO 15"
	247	+
	248	+[[presets]]
	249	+id = "6201-2RS"
	250	+title = "6201-2RS"
	251	+params = { designation = "6201", closure = "2rs", flanged = false }
	252	+aliases = ["6201-2RS bearing", "6201-2RS"]
	253	+standard = "ISO 15"
	254	+
	255	+[[presets]]
	256	+id = "6202"
	257	+title = "6202"
	258	+params = { designation = "6202", closure = "open", flanged = false }
	259	+aliases = ["6202 bearing"]
	260	+standard = "ISO 15"
	261	+
	262	+[[presets]]
	263	+id = "6202ZZ"
	264	+title = "6202ZZ"
	265	+params = { designation = "6202", closure = "zz", flanged = false }
	266	+aliases = ["6202-2Z", "6202ZZ bearing"]
	267	+standard = "ISO 15"
	268	+
	269	+[[presets]]
	270	+id = "6202-2RS"
	271	+title = "6202-2RS"
	272	+params = { designation = "6202", closure = "2rs", flanged = false }
	273	+aliases = ["6202-2RS bearing"]
	274	+standard = "ISO 15"
	275	+
	276	+[[presets]]
	277	+id = "6803-2RS"
	278	+title = "6803-2RS"
	279	+params = { designation = "6803", closure = "2rs", flanged = false }
	280	+aliases = ["6803-2RS bearing", "6803-2RS"]
	281	+standard = "ISO 15"
	282	+
	283	+[[presets]]
	284	+id = "MR85"
	285	+title = "MR85"
	286	+params = { designation = "MR85", closure = "open", flanged = false }
	287	+aliases = ["MR85 bearing"]
	288	+standard = "ISO 15"
	289	+
	290	+[[presets]]
	291	+id = "MR85ZZ"
	292	+title = "MR85ZZ"
	293	+params = { designation = "MR85", closure = "zz", flanged = false }
	294	+aliases = ["MR85-2Z", "MR85ZZ bearing"]
	295	+standard = "ISO 15"
	296	+
	297	+[[presets]]
	298	+id = "MR95"
	299	+title = "MR95"
	300	+params = { designation = "MR95", closure = "open", flanged = false }
	301	+aliases = ["MR95 bearing"]
	302	+standard = "ISO 15"
	303	+
	304	+[[presets]]
	305	+id = "MR95ZZ"
	306	+title = "MR95ZZ"
	307	+params = { designation = "MR95", closure = "zz", flanged = false }
	308	+aliases = ["MR95-2Z", "MR95ZZ bearing"]
	309	+standard = "ISO 15"
	310	+
	311	+[[presets]]
	312	+id = "F608"
	313	+title = "F608"
	314	+params = { designation = "608", closure = "open", flanged = true }
	315	+aliases = ["F608 bearing"]
	316	+standard = "ISO 15"
	317	+
	318	+[[presets]]
	319	+id = "F623"
	320	+title = "F623"
	321	+params = { designation = "623", closure = "open", flanged = true }
	322	+aliases = ["F623 bearing"]
	323	+standard = "ISO 15"
	324	+
	325	+[[presets]]
	326	+id = "F623ZZ"
	327	+title = "F623ZZ"
	328	+params = { designation = "623", closure = "zz", flanged = true }
	329	+aliases = ["F623-2Z", "F623ZZ bearing", "F623ZZ"]
	330	+standard = "ISO 15"
	331	+
	332	+[[presets]]
	333	+id = "F624"
	334	+title = "F624"
	335	+params = { designation = "624", closure = "open", flanged = true }
	336	+aliases = ["F624 bearing"]
	337	+standard = "ISO 15"
	338	+
	339	+[[presets]]
	340	+id = "F625"
	341	+title = "F625"
	342	+params = { designation = "625", closure = "open", flanged = true }
	343	+aliases = ["F625 bearing"]
	344	+standard = "ISO 15"
	345	+
	346	+[[presets]]
	347	+id = "F626"
	348	+title = "F626"
	349	+params = { designation = "626", closure = "open", flanged = true }
	350	+aliases = ["F626 bearing"]
	351	+standard = "ISO 15"
	352	+
	353	+[[presets]]
	354	+id = "F688"
	355	+title = "F688"
	356	+params = { designation = "688", closure = "open", flanged = true }
	357	+aliases = ["F688 bearing"]
	358	+standard = "ISO 15"
	359	+

README.md added in 2.0.0

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	1	+# Deep groove ball bearing (ISO 15)
	2	+
	3	+Single-row deep groove ball bearing, metric: miniature 6xx and MR sizes, 60, 62, 63, 68 and 69 series up to a 50 mm
	4	+bore; open, shielded (ZZ / 2Z) or sealed (2RS); optionally with a flange on the outer ring (F623, F608, ...).
	5	+
	6	+## Geometry
	7	+
	8	+Envelope for assemblies and fits:
	9	+
	10	+- one solid with the boundary dimensions: bore **d**, outside diameter **D**, width **B**;
	11	+- flat faces: shields and seals flush with the ring faces; balls, cage and the gap between the rings are not
	12	+ modelled (no catalogue dimension gives them);
	13	+- flanged: a flange of diameter **D1** and width **C1** on the outer ring, flush with the bottom face.
	14	+
	15	+Centred on the origin, axis along Z, faces at z = ±B/2.
	16	+
	17	+## Parameters
	18	+
	19	+| Parameter | Meaning |
	20	+|---|---|
	21	+| `designation` | Basic bearing number: 623 … 629, 688, MR85, MR95, 6000 … 6010, 6200 … 6210, 6300 … 6310, 6800 … 6810, 6900 … 6910 |
	22	+| `closure` | `open`, `zz` (metal shields both sides), `2rs` (rubber seals both sides) |
	23	+| `flanged` | Flange on the outer ring (F623, F624, F625, F626, F608, F688 only) |
	24	+
	25	+## Sources
	26	+
	27	+- **Boundary dimensions d × D × B, per bearing number:** NTN, *Ball and Roller Bearings*, CAT. No. 2203-3/E (2024),
	28	+ pp. B-22 to B-27 (60, 62, 63, 68, 69 series) and B-48 to B-51 (miniature series: 623 … 629 (629 as 629X50), 688A,
	29	+ MR85 as 675, MR95 as BC5-9), <https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf>. These are ISO 15:2017 boundary dimensions (*Rolling bearings — Radial
	30	+ bearings — Boundary dimensions, general plan*; preview with diameter series 7 and 8: <https://cdn.standards.iteh.ai/samples/69977/9ac39b8b79a94b74b35cba8868eabe4f/ISO-15-2017.pdf>, where 6800 … 6810,
	31	+ MR85 open and 688A (8 × 16 × 4) are checked directly); ISO 15 tabulates dimension series, not bearing numbers.
	32	+- **MR85, MR95**: NSK online product catalogue, *Extra Small Ball Bearings and Miniature Ball Bearings Metric Series*
	33	+ (<https://www.nsk.com/engineering/products/bearings/ball-bearings/deep-groove-ball-bearings/extra-small-ball-bearings-and-miniature-ball-bearings-metric-series/mr85-esm-md.html> and the MR85ZZ, MR95, MR95ZZ1 pages): MR85 5 × 8 × 2, MR85ZZ 5 × 8 × 2.5, MR95 5 × 9 × 2.5,
	34	+ MR95ZZ1 5 × 9 × 3. The shielded versions are wider than the open ones; sealed (2RS) widths aren't given, so MR85 /
	35	+ MR95 aren't offered with seals.
	36	+- **688:** NSK 688A 8 × 16 × 4 open (<https://www.nsk.com/engineering/products/bearings/ball-bearings/deep-groove-ball-bearings/extra-small-ball-bearings-and-miniature-ball-bearings-metric-series/688a-esm-md.html>), 688AZZ1, 688ADD and 688AVV 8 × 16 × 5; NTN p. B-50
	37	+ (688A open B 4, W688AZZ 5).
	38	+- **623, 624 sealed (2RS):** SKF 623-2RS1 3 × 10 × 4 and 624-2RS1 4 × 13 × 5, as listed by Simply Bearings
	39	+ (<https://www.simplybearings.co.uk/products/623-2rs1-skf>, <https://www.simplybearings.co.uk/products/624-2rs1-skf>);
	40	+ the 625 … 629 and 688 sealed widths from NSK's DD / VV item pages.
	41	+- **Flanges D1 × C1:** NSK online product catalogue, *… Metric Series With Flange*, items F623ZZ, F624ZZ, F625ZZ,
	42	+ F626ZZ1, F608ZZ (<https://www.nsk.com/engineering/products/bearings/ball-bearings/deep-groove-ball-bearings/extra-small-ball-bearings-and-miniature-ball-bearings-metric-series-with-flamge/f608zz-esm-md-wf.html>), F688A (D1 18, C1 1, open) and F688AZZ1 (18 × 1.1); NTN
	43	+ p. B-50 (FL688A C1 1.0 open, 1.1 shielded). The other flanges are the same open and shielded.
	44	+
	45	+The model uses only these sourced dimensions: d, D, B, D1, C1.
	46	+
	47	+| Designation | d | D | B (open) | B (ZZ / 2RS) | D1 × C1 |
	48	+|---|---|---|---|---|---|
	49	+| 623 | 3 | 10 | 4 | 4 | 11.5 × 1 |
	50	+| 624 | 4 | 13 | 5 | 5 | 15 × 1 |
	51	+| 625 | 5 | 16 | 5 | 5 | 18 × 1 |
	52	+| 626 | 6 | 19 | 6 | 6 | 22 × 1.5 |
	53	+| 627 | 7 | 22 | 7 | 7 | |
	54	+| 608 | 8 | 22 | 7 | 7 | 25 × 1.5 |
	55	+| 629 | 9 | 26 | 8 | 8 | |
	56	+| 688 | 8 | 16 | 4 | 5 | 18 × 1 (open), 18 × 1.1 (ZZ / 2RS) |
	57	+| MR85 | 5 | 8 | 2 | 2.5 (ZZ) | |
	58	+| MR95 | 5 | 9 | 2.5 | 3 (ZZ) | |
	59	+| 6000 … 6010 | 10 … 50 | 26 … 80 | 8 … 16 | same | |
	60	+| 6200 … 6210 | 10 … 50 | 30 … 90 | 9 … 20 | same | |
	61	+| 6300 … 6310 | 10 … 50 | 35 … 110 | 11 … 27 | same | |
	62	+| 6800 … 6810 | 10 … 50 | 19 … 65 | 5 … 7 | same | |
	63	+| 6900 … 6910 | 10 … 50 | 22 … 72 | 6 … 12 | same | |
	64	+
	65	+Every row is in `part.py` (`BEARINGS`, `FLANGES`).
	66	+
	67	+Not offered (no source for the dimensions): F6000, F6001 flanges; MR85-2RS, MR95-2RS.
	68	+
	69	+Changed in 1.0.1: the face recesses (drawn depths and ring widths that no catalogue gives) are removed; the model is
	70	+the exact d × D × B envelope.
	71	+
	72	+Corrected in this audit: 688 open width 5 -> 4 and the open F688 flange width 1.1 -> 1.0 (the shielded and
	73	+sealed 688 stay 5 wide with a 1.1 flange).
	74	+
	75	+Preset list: designations of the step.parts catalogue (MIT), see `library/NOTICE.md`.
	76	+