Adjustable Boat Side Rail Accessory Mount
Print Profile(1)
Bill of Materials
Description
A strong and versatile mounting bracket designed to attach accessories to square or rectangular boat railings without drilling into the boat itself. Originally designed to hold an LED light bar, this bracket can be used for a wide variety of marine and outdoor applications.
The holder features multiple mounting positions for vertical adjustment, allowing accessories to be positioned at the desired height. Its robust design provides excellent rigidity while remaining easy to print on virtually any FDM printer.
With an outside dimension of 141 × 188 mm and an internal width of 122 mm, this bracket fits many common boat railings and can easily be adapted for custom projects.
No AMS is required.
Perfect for
- LED light bars
- Navigation lights
- GoPro and action cameras
- Fish finder accessories
- GPS or radio antennas
- Rod holder adapters
- Flag poles
- Utility hooks
- Tool holders
- Trailer rails
- Camping and overlanding setups
- Custom accessory mounts
Features
- Designed for square and rectangular railings
- Outside dimensions: 141 × 188 mm
- Internal width: 122 mm
- Multiple vertical adjustment positions
- Strong and rigid construction
- No drilling into the boat required
- Modular and easy to customize
- No AMS required
- Reliable and easy to print
- Suitable for marine and outdoor use
- Few can be printed in one bed
- Multiple holders can hold heavy accessories
Printing Recommendations
- Layer height: 0.20 mm
- Material:
- PETG (recommended)
- ASA for maximum UV and weather resistance
- ABS for high-temperature environments
- Infill: 15–30%
- Walls: 2–4 perimeters
- Top/Bottom layers: 3+
- Print orientation as supplied
For heavy accessories or rough-water use, increasing infill and wall count is recommended.
Assembly / Mounting
Assembly requires standard bolts, washers, and lock nuts. The 8 mm mounting holes are compatible with:
- M8 bolts
- 5/16" bolts
- Smaller hardware with washers if desired
Once assembled, the bracket securely clamps around the railing and allows accessories to be mounted at different heights using the adjustment holes.
Designed to provide a sturdy and removable mounting solution without permanently modifying the boat.
If you find this model useful, please consider rating it and sharing your setup. Seeing how others adapt the design for different accessories is always appreciated.
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License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including, but not limited to, publishing derivative works outside the Makerworld platform or hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money or collect fees. Subject to the above restrictions, derivative works may be published only within the Makerworld platform, and all such derivative works must be licensed under the same SDFL‑C license, without modification or additional terms. You may download the digital versions of this object, 3D print it, and display images, videos, or usage demonstrations of 3D printed versions of the object on personal social media platforms or Makerworld official channels, provided that no digital versions of the object are shared or distributed.
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