Brackets and mounts
5-DOF Educational Robot Arm - Exploded Part Set
- Bounding box
- 1170.8 × 120.0 × 200.0 mm
- Engine
- Precision B-rep
- Parameters
- 26
- Published
- November 12, 2026
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Free to download and use. See the terms.
The prompt
Design a 3D CAD model of a 5-degree-of-freedom articulated robotic arm for educational and light pick-and-place applications. Requirements: Base diameter: 120 mm with four mounting holes (8 mm diameter) equally spaced on a 90 mm bolt circle. Total arm reach: approximately 600 mm. The arm consists of: Rotating base (Joint 1) Shoulder link (200 mm) Elbow link (180 mm) Wrist pitch joint Wrist rotation joint End effector interface with standard servo mounting pattern for attaching different grippers. Use hollow links with 3 mm wall thickness to reduce weight. Include internal cable routing holes throughout all links. All joints should use ball bearings (608ZZ) with shafts and spacers where appropriate. Servo motors: Base and shoulder: MG996R mounting dimensions. Elbow and wrist: MG90S mounting dimensions. Design all brackets with filleted corners (5 mm radius) to improve strength. Add ribs on long links for stiffness while keeping the structure lightweight. Use M3 screws for small assemblies and M5 bolts for structural joints. Include mechanical stops to prevent over-rotation. Design every component as an individual solid body suitable for assembly. Ensure the design is fully parametric. Add realistic clearances (0.3 mm) for 3D printing. Material assumption: PLA or PETG. Generate complete assembly with exploded view compatibility. Every part must be manufacturable using FDM 3D printing without excessive support material.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Plate Diameter | 120 mm | 90 – 200 |
| Base Plate Thickness | 10 mm | 6 – 20 |
| Mounting Bolt Circle | 90 mm | 60 – 160 |
| Mounting Hole Diameter | 8 mm | 5 – 12 |
| Turret Diameter | 110 mm | 85 – 160 |
| Turret Height | 45 mm | 30 – 70 |
| Hollow Link Wall | 3 mm | 2 – 5 |
| Shoulder Link Length | 200 mm | 120 – 300 |
| Shoulder Section Width | 30 mm | 20 – 50 |
| Shoulder Section Depth | 24 mm | 18 – 45 |
| Elbow Link Length | 180 mm | 110 – 260 |
| Elbow Section Width | 26 mm | 18 – 45 |
| Elbow Section Depth | 22 mm | 16 – 40 |
| Wrist Pitch Bracket Length | 45 mm | 35 – 70 |
| Wrist Pitch Bracket Width | 35 mm | 26 – 60 |
| Wrist Yoke Height | 40 mm | 30 – 60 |
| Wrist Housing Diameter | 32 mm | 24 – 50 |
| Wrist Housing Length | 40 mm | 25 – 70 |
| End Effector Plate Size | 40 mm | 30 – 70 |
| End Effector Plate Thickness | 6 mm | 4 – 12 |
| 608ZZ Outer Diameter | 22 mm | 16 – 30 |
| 608ZZ Bore | 8 mm | 5 – 12 |
| 608ZZ Width | 7 mm | 5 – 12 |
| FDM Fit Clearance | 0.3 mm | 0.1 – 0.6 |
| Bracket Fillet Radius | 5 mm | 0 – 10 |
| Exploded Layout Gap | 40 mm | 10 – 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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