Gears and transmission
3-Axis Articulated Robot Arm
- Bounding box
- 411.7 × 180.0 × 268.7 mm
- Engine
- Precision B-rep
- Parameters
- 26
- Published
- October 17, 2026
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The prompt
Create a simplified 3D CAD model of a 3-axis articulated robot arm, using basic solid shapes. Use millimeters. - Base: a 160 × 160 × 10 rectangular plate. - Joint 1: a vertical cylindrical housing, diameter 80, height 55, centered on the base. - Add a U-shaped shoulder bracket above joint 1. - Joint 2: a horizontal cylindrical housing, diameter 80, length 50, mounted in the shoulder bracket. - Upper arm: a rectangular link, 175 mm between shoulder and elbow axes. - Joint 3: a horizontal cylindrical pivot, diameter 45, parallel to joint 2. - Forearm: a rectangular link, 200 mm from elbow axis to tool mounting plate. - Show the upper arm tilted 45 degrees above horizontal and the forearm horizontal. - Add a simplified 42 × 42 × 60 motor block at each joint. - Joint 1 and joint 2 housings represent gearboxes. Model their external shapes only. - Joint 3 is directly driven, without a gearbox. - Add a small fixed end plate, without a gripper. Only create the external robot shape. No internal gears, screws, bearings, motion simulation, or detailed assembly constraints.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Length | 160 mm | 80 – 300 |
| Base Width | 160 mm | 80 – 300 |
| Base Thickness | 10 mm | 4 – 30 |
| Joint 1 Housing Diameter | 80 mm | 40 – 150 |
| Joint 1 Housing Height | 55 mm | 30 – 150 |
| Shoulder Bracket Width X | 120 mm | 80 – 250 |
| Shoulder Bracket Depth Y | 80 mm | 50 – 180 |
| Shoulder Bracket Overall Height | 70 mm | 40 – 200 |
| Shoulder Bracket Base Thickness | 10 mm | 5 – 30 |
| Shoulder Bracket Cheek Thickness | 15 mm | 5 – 30 |
| Joint 2 Housing Diameter | 80 mm | 40 – 150 |
| Joint 2 Housing Length | 50 mm | 20 – 120 |
| Upper Arm Axis Length | 175 mm | 100 – 400 |
| Upper Arm Angle Above Horizontal | 45 deg | 0 – 90 |
| Upper Arm Width | 40 mm | 20 – 100 |
| Upper Arm Thickness | 30 mm | 15 – 80 |
| Joint 3 Pivot Diameter | 45 mm | 20 – 100 |
| Joint 3 Pivot Length | 50 mm | 20 – 100 |
| Forearm Length | 200 mm | 100 – 500 |
| Forearm Width | 32 mm | 15 – 80 |
| Forearm Thickness | 25 mm | 12 – 60 |
| End Plate Width | 60 mm | 30 – 150 |
| End Plate Height | 60 mm | 30 – 150 |
| End Plate Thickness | 8 mm | 3 – 25 |
| Motor Block Cross-section | 42 mm | 20 – 100 |
| Motor Block Length | 60 mm | 30 – 150 |
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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