[family] round_u_bolt_pipe_saddle_clamp

[sunzhenchuan007]

Family: round_u_bolt_pipe_saddle_clamp

Anchor: STAUFF Catalogue 1 — STAUFF Clamps, English, version 06/2026, pages 152–155

This family covers the catalogued RB+RUK and RB+RUL assemblies: one round-steel U-bolt, one plastic pipe saddle and four nuts. The short RUK and long RUL saddles are discrete sourced variants with the same six-part assembly principle. Pipe/tube and substrate are excluded. Page-156 saddle-free RBD is excluded because the old BenchCAD corpus already contains a plain DIN 3570 u_bolt; no equivalent round-U-bolt-with-saddle assembly was found in the current designs, registry, Issues or PRs.

Claim it: self-assign, then re-verify the evidence below before coding.
Done = one scoped PR (designs/round_u_bolt_pipe_saddle_clamp/ only) that closes this issue.
Start here: AGENTS.md + docs/DESIGN_SPEC.md.

Reference images

待用户手动补充官方工程图和产品照片。

Dimension table

All dimensions are millimetres and row-coupled. RUK H3/H4 and RUL H3/H4 are the variant-specific assembly values. Select a complete D1 row and then join only the matching A row from the appropriate saddle table.

D1	A	L1	H1	H2	G	RUK H3/H4	RUL H3/H4
25	30	40	73.5	41	M10	30 / 17.5	30 / 17.5
26.9	30	40	73.5	41	M10	30 / 18.5	30 / 18.5
30	38	48	81	48	M10	30 / 20	30 / 20
33.7	38	48	81	48	M10	30 / 22	30 / 22
38	46	56	89	48	M10	30 / 24	30 / 24
42.4	46	56	89	48	M10	30 / 26.2	30 / 26.2
44.5	52	62	100	55	M10	35 / 27.2	35 / 27.2
48.3	52	62	100	55	M10	35 / 29	35 / 29
57	64	76	118	63	M12	39 / 33.5	39 / 33.5
60.3	64	76	118	63	M12	39 / 35.2	39 / 35.2
76.1	82	94	135	77	M12	39 / 43	39 / 43
88.9	94	106	152	82	M12	41 / 52.5	39 / 54.5
108	120	136	190	105	M16	49 / 62	47 / 64
114.3	120	136	190	105	M16	49 / 65	47 / 67
133	148	164	217	105	M16	49 / 74.5	47 / 76.5
139.7	148	164	217	105	M16	49 / 78	47 / 80
159	176	192	247	105	M16	51 / 87.5	47 / 91.5
168.3	176	192	247	105	M16	51 / 92	47 / 96
193.7	202	218	273	105	M16	51 / 105	47 / 109
216	228	248	311	125	M20	59 / 116	55 / 120
219.1	228	248	311	125	M20	59 / 117.5	55 / 121.5
267	282	303	364	125	M20	59 / 141.5	55 / 145.5
273	282	302	364	125	M20	59 / 144.5	55 / 148.5
318	332	352	418	125	M20	62 / 167	55 / 174
323.9	332	352	418	125	M20	62 / 170	55 / 177
355.6	378	402	475	145	M24	70 / 186	63 / 193
368	378	402	475	145	M24	70 / 192	63 / 199
406.4	428	452	526	145	M24	70 / 211	63 / 218
419	428	452	526	145	M24	70 / 217.5	63 / 224.5
508	530	554	627	145	M24	70 / 262	63 / 269
521	530	554	627	145	M24	70 / 269	63 / 276

RUK short-saddle rows

A values	L2	L3	B	H5	H6	H7	D2
30, 38, 46, 52	35	25	24	5	8	5	8
64, 82	38	25	50	5	10	6	10
94, 120, 148	75	40	70	8	17	10	15
176, 202, 228, 282	140	90	75	8	26	10	25
332, 378, 428, 530	220	150	75	8	32	10	30

RUL long-saddle rows

A	L2	L3	B	H5	H6	D4
30	75	40	30	5	12	11
38	80	48	30	5	12	11
46	90	56	30	5	12	11
52	95	62	35	5	15	11
64	110	76	35	5	15	14
82	135	94	35	5	15	14
94	145	106	40	10	20	14
120	190	136	40	10	20	18
148	220	164	40	10	20	18
176	250	192	50	12	25	18
202	270	218	50	12	25	18
228	315	248	50	12	25	22
282	370	302	50	12	25	22
332	420	352	60	15	30	22
378	480	402	60	15	30	26
428	540	452	60	15	30	26
530	640	554	60	15	30	26

Standard saddle materials are PP and PA. Configuration-specific metal codes are W1/W32/W5; material choices are metadata, not geometry variants.

Parameters to verify at claim

Parameter	Type	Allowed values / source
saddle_variant	discrete	RUK_SHORT, RUL_LONG
catalog_row	discrete	the 31 complete D1 rows above
d1	derived, mm	selected row, min 25, max 521
a, envelope and saddle dimensions	derived	same D1 row plus matching A/variant row
thread_size	derived	G from selected row
saddle_material	metadata	PP or PA
metal_material	metadata	W1, W32 or W5

Suggested coverage: easy uses central RUK rows; medium covers both saddles and thread transitions; hard reaches the smallest/largest rows and long-saddle extremes. Every difficulty must retain a real (saddle_variant, D1) combination.

Engineering constraints

1. Return six named positive-volume solids: one round U-bolt, one saddle and four nuts.
2. The two U-bolt legs are parallel and symmetric about the pipe axis; all four nuts are coaxial with the two legs.
3. The saddle concave face is coaxial with D1 and must use the A-coupled dimensions for the selected variant.
4. RUK and RUL are discrete saddle topologies; do not continuously morph or interpolate between them.
5. Four views must expose the round U-bolt section, saddle length/topology and four-nut arrangement.
6. Validate real-row membership, the six-solid count, positive volumes, correct thread transition and no unintended fusion.
7. Thread flanks, nut chamfers, bend radii, saddle radii, local draft, recesses and exact clearances are not fully dimensioned. Use deterministic proportion values or omit them; do not infer preload, deformation, hidden washers or a substrate.

[github-actions]

✅ Registry check: round_u_bolt_pipe_saddle_clamp collides with none of the 0 known names.

Thanks for the proposal! Whoever claims this verifies it first — the
5-minute evidence check in CONTRIBUTING.md ("Claiming an issue = you verify it"):
standard link real · dimensioned drawing · table with min/max rows · two numbers spot-checked.

Gaps? Fill them yourself (credited) or label needs-evidence with one comment naming what's missing.

新人中文指南: GETTING_STARTED.zh.md · Questions → Discord