Brackets and mounts
Robotic Elbow Pitch Joint (RDS3115MG)
- Bounding box
- 95.0 × 54.0 × 56.5 mm
- Engine
- Precision B-rep
- Parameters
- 19
- Published
- August 25, 2026
Download
Free to download and use. See the terms.
The prompt
Design a compact FDM 3D-printable robotic elbow pitch joint around an RDS3115MG dual-shaft servo. Servo body: 40 × 20 × 39.5 mm. The two servo output shafts are coaxial and define the pitch axis. No bearings or separate axle. Create a strong removable servo housing with 4 mm walls and 6 mm material around high-load areas. Keep both shafts accessible and coaxial. Add a rigid forearm attachment centered on the servo shaft and a matching support on the opposite shaft. Design for ±90° pitch rotation with clearance from the servo, housing and screws. Add gussets and fillets for stiffness while keeping it lightweight and FDM-printable. Do not guess shaft or mounting-hole dimensions; make unknown dimensions editable parameters. Make it a real robotic elbow joint, NOT a generic U-shaped servo bracket.
Parameters
| Name | Value | Range |
|---|---|---|
| Servo Length | 40 mm | 30 – 60 |
| Servo Width | 20 mm | 15 – 30 |
| Servo Height | 39.5 mm | 30 – 50 |
| Wall Thickness | 4 mm | 2 – 8 |
| Reinforced Thickness | 6 mm | 4 – 10 |
| Housing Clearance | 2 mm | 0.5 – 5 |
| Mounting Screw Diameter | 3 mm | 2 – 4 |
| Mounting Screw Spacing | 24 mm | 10 – 40 |
| Mounting Plate Thickness | 4 mm | 2 – 8 |
| Shaft Diameter | 6 mm | 4 – 10 |
| Shaft Clearance | 0.5 mm | 0.1 – 2 |
| Spline Teeth | 25 | 20 – 30 |
| Forearm Length | 60 mm | 30 – 100 |
| Forearm Width | 12 mm | 8 – 20 |
| Forearm Hub Diameter | 25 mm | 15 – 35 |
| Support Length | 35 mm | 20 – 60 |
| Support Hub Diameter | 20 mm | 12 – 30 |
| Gusset Thickness | 4 mm | 2 – 8 |
| Fillet Radius | 2 mm | 0.5 – 5 |
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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