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
Download
Free to download and use. See the terms.
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 |
|---|---|---|
| Plate Length | 170 mm | 120 – 240 |
| Plate Width | 140 mm | 100 – 200 |
| Plate Thickness | 5 mm | 2 – 10 |
| Standoff Hole Diameter | 3.2 mm | 2.5 – 4 |
| Standoff Hole Spacing (Square) | 100 mm | 80 – 130 |
| Boss Diameter | 8 mm | 6 – 10 |
| Boss Height | 5 mm | 3 – 8 |
| Counterbore Diameter | 6.2 mm | 5 – 8 |
| Counterbore Depth | 3 mm | 1.5 – 4 |
| Motor Screw Hole Diameter | 3.2 mm | 2.5 – 4 |
| Motor Slot Length | 8 mm | 5 – 12 |
| Motor Mount Y Inset from Edge | 8 mm | 5 – 15 |
| Motor Mount X Offset from Center | 25 mm | 15 – 40 |
| Caster Screw Hole Diameter | 3.2 mm | 2.5 – 4 |
| Caster Hole Spacing | 20 mm | 10 – 40 |
| Caster X Inset from Rear Edge | 8 mm | 5 – 15 |
| HC-SR04 Cutout Width | 30 mm | 20 – 40 |
| HC-SR04 Cutout Depth | 10 mm | 5 – 20 |
| HC-SR04 Mount Hole Diameter | 2 mm | 1.5 – 3 |
| HC-SR04 Mount Y Spacing | 25 mm | 15 – 35 |
| HC-SR04 Mount X Inset | 5 mm | 2 – 10 |
| WS2812 Mount Hole Diameter | 2 mm | 1.5 – 3 |
| WS2812 Y Spacing | 18 mm | 10 – 30 |
| WS2812 X Position | 45 mm | 20 – 70 |
| IR Sensor Hole Diameter | 3.2 mm | 2.5 – 4 |
| IR Sensor Y Inset from Edge | 18 mm | 10 – 30 |
| IR Sensor X Center | 70 mm | 50 – 70 |
| IR Sensor Hole Spacing | 20 mm | 10 – 20 |
| Battery Holder Hole Diameter | 3.2 mm | 2.5 – 4 |
| Battery Holder Hole Spacing | 76 mm | 60 – 100 |
| Battery Holder X Position | 0 mm | -40 – 40 |
| OLED Cutout Length X | 25 mm | 15 – 35 |
| OLED Cutout Width Y | 12 mm | 8 – 20 |
| OLED Cutout X Position | 35 mm | 20 – 60 |
| OLED Cutout Y Position | 0 mm | -20 – 20 |
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.
More models
Browse the full gallery →Spur Gearbox
design gearbox
Spur Gear (12 Teeth)
Built a gear with 12 teeth
Involute Spur Gear with Keyway
Precision Involute Spur Gear with Hub and Keyway: Module (m) of 2.0 mm, 40 teeth (z), Pitch Circle Diameter (d) of 80.00 mm, 20° pressure angle (\alpha), 15.00 mm face width (b), a