Gears and transmission
Mecanum Robot Chassis
- Bounding box
- 300 × 260 × 80 mm
- Engine
- 3D Printing B-rep
- Parameters
- 32
- Published
- October 28, 2026
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The prompt
MOTOR BRACKETS (4): L-shaped brackets, 2 mm thick, 40 mm wide, hanging below the plate. The horizontal leg is 30 mm long and is fixed against the underside of the plate, with its outer edge flush with the plate side edge at X = +/-100. The vertical leg is 45 mm tall and points downward, with its outer face at X = +/-100. Each vertical leg has one 12 mm hole whose centre is at Z = 40, and two 3.2 mm holes 31 mm apart on either side of it. Bracket centres are at Y = +75 and Y = -75, mirrored on the left and right sides. Add a 3 mm inside fillet at the bend. MOTORS (4): cylinders of 37 mm diameter and 60 mm length with their axis along X at Z = 40, Y = +/-75. The body runs from X = +/-38 to +/-98 (inner face of the bracket leg). A 12 mm diameter x 10 mm long gearbox boss runs outward through the bracket hole to X = +/-110. A 6 mm diameter shaft with a D-flat extends a further 20 mm to X = +/-130. MECANUM WHEELS (4): wheel axis along X through the shaft, centred at X = +/-130, Y = +/-75, Z = 40. Each wheel has overall diameter 80 mm and width 40 mm (X = +/-110 to +/-150). Each wheel is a hub disc of 60 mm diameter x 40 mm width, with a 6 mm D-bore, and 8 equally spaced barrel rollers around the rim. Each roller is 30 mm long, with a maximum diameter of 16 mm tapering to 8 mm at the ends, and a 3 mm axle bore. Roller centres are at a radius of 32 mm from the wheel axis, and each roller axis is tilted at 45 degrees to the wheel axis. Front-left and rear-right wheels have rollers tilted one way (left-handed). Front-right and rear-left wheels are mirrored (right-handed), so that viewed from above the roller axes form an X pattern. The assembled vehicle is symmetric about X = 0 and Y = 0, with all four wheels touching the ground plane at Z = 0.
Parameters
| Name | Value | Range |
|---|---|---|
| Chassis length X | 200 mm | 100 – 400 |
| Chassis length Y | 260 mm | 100 – 400 |
| Chassis plate thickness | 5 mm | 2 – 15 |
| Chassis underside height | 62 mm | 20 – 150 |
| Vertical corner fillet radius | 10 mm | 1 – 40 |
| Sheet thickness | 2 mm | 1.2 – 6 |
| Bracket width along Y | 40 mm | 20 – 100 |
| Horizontal leg length | 30 mm | 15 – 80 |
| Vertical leg height | 45 mm | 20 – 120 |
| Inside bend fillet radius | 3 mm | 0 – 10 |
| Bracket centre offset in Y | 75 mm | 10 – 120 |
| Axle hole diameter | 12 mm | 5 – 25 |
| Mounting hole diameter | 3.2 mm | 2 – 8 |
| Mounting hole spacing along Y | 31 mm | 10 – 60 |
| Motor body diameter | 37 mm | 15 – 80 |
| Motor body length | 60 mm | 20 – 120 |
| Motor body inner face |X| | 38 mm | 5 – 120 |
| Gearbox boss diameter | 12 mm | 4 – 30 |
| Boss length outside bracket face | 10 mm | 2 – 40 |
| Output shaft diameter | 6 mm | 2 – 12 |
| Shaft flat distance from axis | 2.5 mm | 1 – 5 |
| Shaft length past boss end | 20 mm | 5 – 60 |
| Wheel outer diameter | 80 mm | 40 – 160 |
| Wheel width along X | 40 mm | 20 – 80 |
| Roller maximum radius | 8 mm | 3 – 15 |
| Roller overall length | 30 mm | 20 – 80 |
| Number of rollers | 8 mm | 6 – 16 |
| Roller tilt angle | 45 deg | 20 – 70 |
| Roller axle bore | 3 mm | 1 – 8 |
| Side flange diameter | 64 mm | 30 – 120 |
| Side flange thickness | 4 mm | 1.5 – 10 |
| Hub disc diameter | 60 mm | 20 – 100 |
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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