Enclosures and housings
Angular Titanium Watch Case Assembly (NH72A)
- Bounding box
- 47.0 × 48.0 × 12.5 mm
- Engine
- Precision B-rep
- Parameters
- 41
- Published
- October 31, 2026
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The prompt
Project Brief: Custom Watch Design Material: Grade 5 Titanium Movement: NH72A Manufacturing: CNC machining Scope of Work 3D CAD Design: Create a complete, parametric SolidWorks model based on the client's watch reference images, featuring an angular luxury design, bezel, case body, caseback, crown, lugs, and strap attachment. Three-Part Case: Divide the case into three main components suitable for the client's CNC limitations. Design practical fastening and assembly methods because the client's machine cannot machine threads. Movement Integration: Fit the NH72A movement using the supplied technical PDF. Movement diameter is 27.40 mm, height is 5.32 mm, and the client specifies a 28.5 mm dial. Account for the casing ring, dial support, spacer ring, crown/stem alignment, hands, crystal, and internal clearances. Screws and Fit: Use the client's screw reference images. Verify screw dimensions, hole positions, tolerances, clearances, and fastening methods before finalizing the model. Technical Manufacturing Drawings: Prepare dimensioned 2D drawings for all custom parts, including orthographic and sectional views, hole details, critical dimensions, tolerances, fits, chamfers, radii, material specifications, and assembly instructions. Manufacturing Checks: Ensure the geometry is practical for Grade 5 titanium CNC machining. Check tool access, wall thickness, component interference, movement clearance, assembly, and serviceability. Final Deliverables Editable SolidWorks assembly and part files. STEP files for the complete assembly and individual components. Complete technical manufacturing drawings in PDF. Assembly and component-fitting documentation. Important: Verify the overall case dimensions, spacer-ring measurements, screw specifications, and any missing critical information before finalizing the design. Do not guess dimensions or release unverified manufacturing files. Goal: Deliver a precise, professional, CNC-manufacturable watch design with complete, consistent CAD files and technical documentation.
Parameters
| Name | Value | Range |
|---|---|---|
| Case OD | 42 mm | 30 – 60 |
| Case Body Height | 8 mm | 4 – 16 |
| Movement Bore Dia | 30.2 mm | 20 – 45 |
| Bezel OD | 42 mm | 30 – 60 |
| Bezel Aperture ID | 30.8 mm | 20 – 45 |
| Bezel Height | 2.5 mm | 1 – 6 |
| Crystal Dia | 30.6 mm | 20 – 44 |
| Crystal Thickness | 1.5 mm | 0.8 – 4 |
| Dial Dia | 28.5 mm | 18 – 40 |
| Dial Thickness | 0.5 mm | 0.3 – 1.5 |
| Hour Hand Length | 6.5 mm | 3 – 12 |
| Minute Hand Length | 10 mm | 4 – 14 |
| Second Hand Length | 12 mm | 5 – 14 |
| Hand Thickness | 0.25 mm | 0.1 – 0.3 |
| Caseback Dia | 40 mm | 25 – 58 |
| Caseback Thickness | 2 mm | 1 – 5 |
| Lug-to-Lug | 48 mm | 32 – 70 |
| Lug Width (outer) | 22 mm | 10 – 30 |
| Lug Inner Gap | 6 mm | 2 – 16 |
| Lug Length (radial) | 9 mm | 4 – 16 |
| Lug Height | 5 mm | 2 – 8 |
| Lug Bottom Offset | 1 mm | 0 – 4 |
| Spring Bar Dia | 1.8 mm | 1 – 3 |
| Spring Bar Length | 22 mm | 10 – 30 |
| Caseback Screw Count | 4 | 2 – 8 |
| Screw Bolt Circle Dia | 34 mm | 20 – 50 |
| Clearance Hole Dia | 1.7 mm | 1 – 3.5 |
| Screw Shank Dia | 1.6 mm | 0.8 – 3 |
| Screw Length | 4 mm | 2 – 8 |
| Screw Head Dia | 2.8 mm | 1.5 – 5 |
| Screw Head Height | 0.8 mm | 0.3 – 2 |
| Crown Dia | 7 mm | 3 – 12 |
| Crown Length | 5 mm | 2 – 10 |
| Crown Axis Height | 4 mm | 1 – 12 |
| Stem Dia | 0.9 mm | 0.5 – 2 |
| Stem Length | 10 mm | 5 – 20 |
| Movement Dia (NH72A) | 27.4 mm | 18 – 34 |
| Movement Height (NH72A) | 5.32 mm | 3 – 9 |
| Casing Ring OD | 30 mm | 20 – 40 |
| Casing Ring ID | 27.5 mm | 18 – 34 |
| Casing Ring Height | 2 mm | 0.5 – 5 |
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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