Gears and transmission
RC Car Gearbox Housing (Housing + Top Cover)
- Bounding box
- 50.0 × 25.0 × 25.0 mm
- Engine
- Precision B-rep
- Parameters
- 21
- Published
- September 28, 2026
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The prompt
Create a precise 3D-printable RC car gearbox housing. Overall dimensions: - Length: 50 mm (5 cm) - Width: 25 mm (2.5 cm) - Height: 20 mm (2 cm) - Wall thickness: 5 mm (0.5 cm) Design: - Compact rectangular gearbox housing for a small RC car. - Use 5 mm thick walls throughout the housing. - Left and right side walls must have bearing holes. - Bearing hole diameter: 10 mm. - The left and right 10 mm bearing holes must be perfectly aligned and coaxial. - Add one brushless motor mounting hole pattern on the motor side. - Use a standard mounting pattern suitable for a small 28xx-size brushless RC motor. - Inside the gearbox, provide space for exactly 2 gears only. - Do NOT add rack gears or any additional gears. - Provide aligned shaft supports for the two gears. - Include screw/mounting points for assembling the gearbox. - Add a removable top cover. - Keep sufficient clearance for gears to rotate freely. - Add small fillets/chamfers to sharp outer edges. - All dimensions must be accurate and in millimeters. - Design must be suitable for FDM 3D printing. - Output should be STL-ready.
Parameters
| Name | Value | Range |
|---|---|---|
| Housing Length (X) | 50 mm | 30 – 120 |
| Housing Width (Y) | 25 mm | 16 – 80 |
| Housing Height (Z) | 20 mm | 10 – 80 |
| Wall Thickness | 5 mm | 1.6 – 12 |
| Outer Edge Fillet (top edge filleted, radius clamped to 0.4x wall) | 1.5 mm | 0 – 2 |
| Output Bearing Bore Dia (both side walls, coaxial) | 10 mm | 3 – 20 |
| Input Gear Shaft Bore Dia (both side walls, coaxial) | 6 mm | 2 – 12 |
| Gear Shaft Centre Distance | 11 mm | 6 – 30 |
| Shaft Axis Height above Base | 12.5 mm | 6 – 18 |
| Corner Screw Boss Dia | 7 mm | 3 – 12 |
| Boss Screw Hole Dia (M2.5 tap) | 2.5 mm | 1.5 – 5 |
| Boss Centre X Offset | 17 mm | 5 – 24 |
| Boss Centre Y Offset | 4.5 mm | 2 – 11 |
| Boss Screw Hole Depth | 10 mm | 3 – 19 |
| Motor Mount Pattern Spacing (square) | 16 mm | 8 – 24 |
| Motor Mount Hole Dia (M3) | 3.2 mm | 1.5 – 6 |
| Motor Shaft Clearance Hole Dia (motor end wall) | 6 mm | 0 – 14 |
| Motor Pattern Centre Height | 10 mm | 5 – 15 |
| Top Cover Thickness | 5 mm | 1.6 – 12 |
| Cover Screw Clearance Hole Dia | 3.4 mm | 1.5 – 6 |
| Cover Corner Fillet (clamped to 0.3x thickness) | 1.5 mm | 0 – 1.5 |
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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