Gears and transmission
Robotic Chassis Base Plate
- Bounding box
- 170.0 × 140.0 × 10.0 mm
- Engine
- Precision B-rep
- Parameters
- 35
- Published
- August 19, 2026
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The prompt
Create a 3D robotic chassis base plate with a length of 170mm, a width of 140mm, and a base thickness of 5mm. Add a 10mm radius fillet to all four outer corners. Center exactly four 3.2mm diameter through-holes arranged in a 100mm by 100mm square. Around each of these four holes, add a raised cylindrical boss that is 8mm in diameter and protrudes 5mm upward from the top surface to act as built-in standoffs. On the bottom surface, add a 6.2mm diameter counterbore 3mm deep for each hole. On the left and right edges, add mounting slots and 3.2mm screw holes for two standard yellow TT DC gear motors. At the rear center, add 3.2mm mounting holes for a 20mm metal caster wheel. At the front edge, create a rectangular cutout and two 2mm mounting holes suitable for an HC-SR04 ultrasonic sensor facing forward. Just behind the front edge, add mounting holes for a WS2812 8-LED module board. Near the front left and front right corners, add mounting holes for two 3-pin IR obstacle avoidance sensors. In the remaining space behind the main PCB area, add two 3.2mm diameter holes spaced exactly 76mm apart for a 2-slot 18650 battery holder. Add a cutout near the PCB area to mount a 0.96-inch I2C OLED display.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Length | 170 mm | 120 – 220 |
| Base Width | 140 mm | 100 – 200 |
| Base Thickness | 5 mm | 2 – 10 |
| Main Mounting Hole Dia | 3.2 mm | 2 – 6 |
| Main Hole Square Spacing | 100 mm | 50 – 130 |
| Standoff Boss Dia | 8 mm | 5 – 14 |
| Standoff Boss Height | 5 mm | 2 – 10 |
| Counterbore Dia | 6.2 mm | 4 – 10 |
| Counterbore Depth | 3 mm | 1 – 5 |
| Motor Mount Edge Inset | 10 mm | 5 – 30 |
| Motor Screw Hole Dia | 3.2 mm | 2 – 6 |
| Motor Screw Hole Y Spacing | 28 mm | 10 – 40 |
| Motor Slot Width | 4 mm | 2 – 8 |
| Motor Slot Length | 15 mm | 6 – 30 |
| Caster Pattern Rear Inset | 18 mm | 5 – 40 |
| Caster Mounting Hole Dia | 3.2 mm | 2 – 6 |
| Caster Hole Square Spacing | 20 mm | 10 – 40 |
| HC-SR04 Cutout Width | 20 mm | 10 – 50 |
| HC-SR04 Cutout Depth | 10 mm | 5 – 30 |
| HC-SR04 Mounting Hole Dia | 2 mm | 1.5 – 4 |
| HC-SR04 Hole X Spacing | 36 mm | 20 – 60 |
| HC-SR04 Hole Front Inset | 12 mm | 5 – 30 |
| WS2812 Mounting Hole Dia | 2 mm | 1.5 – 4 |
| WS2812 Hole X Spacing | 20 mm | 10 – 60 |
| WS2812 Front Inset | 30 mm | 10 – 60 |
| IR Sensor Mounting Hole Dia | 2 mm | 1.5 – 4 |
| IR Sensor Hole Pair Spacing | 15 mm | 6 – 30 |
| IR Sensor Pair Center X | 57.5 mm | 40 – 80 |
| IR Sensor Front Inset | 12 mm | 5 – 30 |
| Battery Holder Hole Dia | 3.2 mm | 2 – 6 |
| Battery Holder Hole Spacing | 76 mm | 40 – 100 |
| Battery Holder Y Position | -35 mm | -60 – 0 |
| OLED Cutout Width | 24 mm | 12 – 50 |
| OLED Cutout Depth | 12 mm | 6 – 40 |
| OLED Cutout Center Y | 0 mm | -40 – 30 |
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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