Enclosures and housings
Snap-Hook C-Groove Lobe Bracket
- Bounding box
- 30.0 × 31.0 × 10.0 mm
- Engine
- Precision B-rep
- Parameters
- 15
- Published
- November 3, 2026
Download
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The prompt
Role: reverse-engineering CAD engineer. Task: from the 4 attached photos, build a complete solid (B-rep) model of the plastic part and RESTORE the broken-off region by mirroring the intact side. Inputs: Photo 1 = face A view; Photo 2 = face B view; Photos 3-4 = edge/side views. Background cutting mat grid = 10 mm cells (scale check only; control dimensions below take priority). The part is BROKEN on one side (torn edge, missing fragment of the round lobe / groove end / snap hook). Do NOT reproduce the fracture. Repair rule: the part has a symmetry plane through the through-hole axis (determine its exact orientation by matching intact features across all 4 photos). Reconstruct all missing geometry as an exact mirror of the corresponding intact side about that plane. Do not invent features absent from the intact side; if the assumed plane conflicts with intact features, choose the plane that best reproduces them and state it in the report. Control dimensions (final part): bounding 30.0 (X) x 31.0 (Y) x 10.0 (Z) mm; central through-hole Ø5.0 mm, axis = Z, centered in the round lobe; concentric C-shaped semicircular groove/channel: width 5.0 mm, depth 4.0 mm, rounded ends (arc angle and centerline radius measured from photos); all other dimensions (base block, lobe radius, snap-hook leaf, fillets/chamfers) measured from photos via the grid, rounded to 0.5 mm. Geometry: rectangular base block; circular lobe blended into it; Ø5 through-hole; 5x4 mm arc groove; flexible snap-hook (tapered leaf with semicircular cutout) per photos 3-4; fillets/chamfers as photographed. Coordinate system: origin at hole center, Z along hole axis, X along 30 mm length, Y along 31 mm width. Output: STEP AP214 + watertight manifold STL; plus 4 renders matching photo orientations and 2 section views (through hole axis and through groove). Workflow: align views -> model intact side -> mirror -> boolean union -> verify control dims (tolerance <=0.1 mm). Report: measured dimension table, chosen symmetry plane, boolean history, files.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall width (X) | 30 mm | 20 – 60 |
| Overall depth (Y) | 31 mm | 20 – 60 |
| Thickness (Z) | 10 mm | 3 – 25 |
| Round lobe radius | 10 mm | 5 – 18 |
| Base block underside Y | 4 mm | 0 – 15 |
| Through-hole diameter | 5 mm | 2 – 12 |
| Groove centreline radius | 6.5 mm | 4 – 12 |
| Groove width | 5 mm | 2 – 8 |
| Groove depth | 4 mm | 1 – 9 |
| Groove start angle | 35 deg | 0 – 360 |
| Groove sweep angle | 260 deg | 30 – 340 |
| Hook relief radius | 12 mm | 8 – 17 |
| Hook leaf lower end Y | -6 mm | -12 – 0 |
| Hook leaf root Y | 6 mm | 2 – 18 |
| Top edge fillet radius | 0.4 mm | 0 – 2 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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