Brackets and mounts
Bolted Micro-ATX NAS Chassis (9-Part Exploded Assembly)
- Bounding box
- 3350.0 × 400.0 × 450.0 mm
- Engine
- Precision B-rep
- Parameters
- 35
- Published
- October 29, 2026
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The prompt
Design a complete custom metal NAS computer case as an editable, dimensionally accurate 3D CAD assembly. External dimensions: 400 mm wide × 400 mm deep × 300 mm high. Requirements: - Fit a standard Micro-ATX motherboard, maximum 244 × 244 mm. - Support a standard ATX power supply. - Provide mounting space for 8 × 2.5-inch SATA hard drives in a removable drive cage. - Include a motherboard tray with correctly positioned standoff holes, a rear I/O opening and PCIe expansion-slot openings. - Include mounting points for case fans and cable-routing space. - Use 1.5 mm steel for the motherboard tray and structural sheet-metal parts, and 1.0–1.2 mm steel for removable covers. - Use a bolted construction that can be assembled without welding. - Keep panels removable for maintenance. - Avoid sharp exposed edges. Create separate parts for the frame, motherboard tray, drive cage, PSU bracket and panels. Use millimetres throughout. Generate a dimensioned technical drawing, a parts list, flat-pattern DXF files for sheet-metal parts, and a STEP assembly if supported. Flag any dimensions that require confirmation rather than guessing.
Parameters
| Name | Value | Range |
|---|---|---|
| Frame Width | 400 mm | 250 – 600 |
| Frame Depth | 400 mm | 250 – 600 |
| Frame Height | 300 mm | 150 – 600 |
| Rail Cross-Section | 18 mm | 10 – 35 |
| Rail / Gusset Thickness | 1.5 mm | 0.8 – 4 |
| Corner Gusset Leg | 60 mm | 20 – 120 |
| Bolt / Insert Hole Dia | 4.5 mm | 2.5 – 8 |
| Tray Width | 300 mm | 250 – 400 |
| Tray Height | 300 mm | 250 – 400 |
| Tray Thickness | 1.5 mm | 1 – 3 |
| Standoff Boss Dia | 6.5 mm | 4 – 12 |
| Standoff Height | 6 mm | 3 – 15 |
| Rear I/O Opening Width | 158.75 mm | 100 – 220 |
| Rear I/O Opening Height | 44.45 mm | 30 – 70 |
| PCIe Access Opening Width | 220 mm | 100 – 300 |
| PCIe Access Opening Height | 24 mm | 10 – 60 |
| Cage Width | 170 mm | 100 – 250 |
| Cage Depth | 130 mm | 80 – 200 |
| Cage Height | 95 mm | 60 – 180 |
| Cage Steel Thickness | 1.5 mm | 0.8 – 3 |
| Drive Bay Pitch | 11 mm | 7 – 20 |
| Drive Bay Count | 8 mm | 2 – 10 |
| PSU Bracket Width | 160 mm | 120 – 220 |
| PSU Bracket Height | 100 mm | 70 – 140 |
| PSU Mounting Flange Depth | 25 mm | 10 – 60 |
| PSU Bracket Thickness | 1.5 mm | 0.8 – 3 |
| PSU Rear Cutout Width | 110 mm | 60 – 160 |
| PSU Rear Cutout Height | 60 mm | 30 – 90 |
| Panel Width / Depth | 400 mm | 250 – 600 |
| Panel Height | 300 mm | 150 – 600 |
| Cover Steel Thickness | 1.2 mm | 0.8 – 2 |
| Vent Hole Diameter | 6 mm | 2 – 15 |
| Vent Columns | 7 mm | 2 – 14 |
| Vent Rows | 5 mm | 2 – 12 |
| Exploded Layout Gap | 40 mm | 5 – 200 |
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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