[family] srf_pipe_tube_bushing

[sunzhenchuan007]

Family: srf_pipe_tube_bushing
Anchor: STAUFF Catalogue 1 — STAUFF Clamps — English, version 06/2026, catalogue page 175. (official catalogue PDF)

• Product/type: Pipe / Tube Bushing, type SRF.
• Scope is the single split bushing used to centre a pipe/tube in a through-hole. Pipe/tube, panel/reservoir wall and mounting hardware are excluded.
• Expected solids = 1.
• Duplicate search was completed before cropping using “SRF”, “pipe/tube bushing”, “through-hole centring bushing”, the proposed name and similar collar/grommet/spacer-ring mechanisms across current designs/, all Issues, all PRs and the old family corpus. No equivalent was found. The current speaker-pole socket, Issue [family] duct_takeoff_starting_collar #28 duct collar and old spacer_ring are materially different interfaces and are documented in rejected-cases.md.

Claim it: self-assign, then re-verify the evidence below before coding.
Done = one scoped PR (designs/srf_pipe_tube_bushing/ 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. Each line is one real catalogued D1 row.

D1	D2	H1	H2	Compatible wall thickness S	D3 mounting bore
6	18	22	4	4…12	10
8	20	22	4	4…12	12
10	22	22	4	4…12	14
12	24	22	4	4…12	16
14	26	22	4	4…12	18
15	28	22	4	4…12	20
16	28	22	4	4…12	20
18	30	22	4	4…12	22
20	32	22	4	4…12	24
22	34	22	4	4…12	26
25	38	22	4	4…12	30
28	41	22	4	4…12	33
30	43	22	4	4…12	34
35	48	22	4	4…12	40
38	51	22	4	4…12	43
42	55	22	4	4…12	47

Standard material codes are PP (natural-colour polypropylene) and SA87 (black 87 Shore-A thermoplastic elastomer). The printed code form is SRF-[D1]-[PP|SA87]. The 4…12 mm S range describes compatible panel/reservoir wall thickness; it is not an invitation to scale unshown internal geometry.

Parameters to verify at claim

Parameter	Type	Allowed values / source
tube_od	discrete row key, mm	the 16 D1 rows above
outer_diameter	derived, mm	D2
height	derived, mm	H1
flange_height	derived, mm	H2
mounting_bore	derived, mm	D3
compatible_wall_thickness	metadata range, mm	4…12
material_code	discrete metadata	PP, SA87

Sampling must choose a complete D1 row. Coverage should include D1 6, the 15/16 pair that shares D2/D3, a middle row and D1 42.

Engineering constraints

Entity division and engineering constraints

1. Generate one split bushing solid with the flange/retaining profile visible in the official section and product image.
2. D1 and D2 must be concentric; D3 is the external mounting-bore requirement and must remain coupled to the selected row.
3. Overall axial height must match H1 and the flange feature H2.
4. Preserve the insertion split/opening. Do not turn the part into a featureless closed spacer ring.
5. Four benchmark views must expose the split, centre bore, flange and axial section.
6. Validate one positive-volume solid, through bore D1, catalogued envelope and row membership.

Unmarked-dimension risk

Split width, retaining-lip depth, flange/taper profile, local radii and deformation during plug-in installation are not fully dimensioned. Use only deterministic proportion values for them. S is compatibility metadata, so do not infer a hidden wall, reservoir geometry or a continuously variable bushing body from S. Do not guess material deformation or internal reinforcement.

[github-actions]

✅ Registry check: srf_pipe_tube_bushing 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