Drain Grid (Grelha para Ralo)

A customizable drain grid designed for 3D printing using OpenSCAD.

Overview

This project provides a parametric OpenSCAD design for a drain grid with a central hub, an outer ring, and multiple connecting spokes. The design is fully customizable, allowing you to easily adjust dimensions and structure to fit your specific needs.

Features

• Customizable Dimensions: Easily adjust external diameter, internal diameter, central hub diameter, and height
• Parametric Design: Modify the number of spokes, spoke thickness, and border thickness
• 3D Print Ready: Optimized for FDM 3D printing on common printers like the Ender 3
• High-Quality Rendering: Configurable quality settings for preview and rendering
• Creative Commons Licensed: Free to use, modify, and distribute

Customization Parameters

All dimensions are defined at the top of Grelha.scad:

Parameter	Default	Description
DiametroExterno	96.5 mm	External diameter of the grid
DiametroInterno	92 mm	Internal diameter of the grid
DiametroCentral	40 mm	Central hub diameter
Altura	8 mm	Height of the grid
EspessuraDaBorda	3.5 mm	Border thickness
EspessuraDoAnel	3.5 mm	Ring thickness
EspessuraDoRaio	2 mm	Spoke thickness
NumeroDeRaios	32	Number of spokes

How to Use

1. Install OpenSCAD: Download and install from OpenSCAD.org
2. Open the File: Open Grelha.scad in OpenSCAD
3. Customize: Modify the parameters at the top of the file to suit your needs
4. Preview: Press F5 to preview the model
5. Render: Press F6 for final render (higher quality)
6. Export: Export as STL for 3D printing: File → Export as STL

3D Printing Notes

• Printer: Tested on Ender 3 and compatible FDM printers
• Material: I tested this model with PET filament and the part became strong enough to support my whole weith on its center.
• Support: Do not requere supports if correctly oriented
• Print Time: Varies based on size and printer speed
• Post-Processing: Just use it. No post-processing required.

License

This project is licensed under the Creative Commons CC0 1.0 Universal (CC0 1.0) license, which means you are free to:

• Use this design for any purpose
• Modify and adapt the design
• Distribute copies freely
• Use the design for commercial purposes

No permission or attribution is required, though it is appreciated!

For more details, visit: Creative Commons CC0 1.0

Author

Carlos Eduardo Foltran

• GitHub: Nartlof
• Project: DrainGrid
• Thingiverse: Grid for floor sink

Sharing Your Prints

If you print this design, feel free to share your creations! You can upload them to:

• Thingiverse
• Printables
• Your favorite 3D printing community

Contributing

Improvements, suggestions, and modifications are welcome! Feel free to fork the project and submit your enhancements.

Support

For issues, questions, or suggestions, please open an issue on the GitHub repository.

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Date Created: April 12, 2026
Last Updated: April 12, 2026