Services: 3D Scanning, Reverse Engineering, CAD Modelling, 3D Printing, Manufacturing
New reverse engineered chain guard (left) vs. the original worn chain guard (right)
Project Overview
The owner of a 1970s motorbike needed to replace a worn and damaged plastic chain guard that had become cracked and deformed after decades of use. The project involved reverse engineering the original component, restoring its intended geometry, and producing a durable replacement suitable for motorcycle restoration.
Challenge
The original chain guard had suffered from long-term wear and previous repairs, which meant the part could not simply be copied directly. The challenge was to recover the correct geometry from the damaged component while ensuring the replacement part would fit properly on the motorcycle frame and maintain a clean appearance.
Solution
The original chain guard was captured using high-accuracy 3D laser scanning to record its geometry. The scan data was processed and reconstructed in CAD software to remove deformation and restore the correct shape of the component. A precise digital model was then used to manufacture a replacement guard using silicone moulding and polypropylene material, followed by a medium-gloss coating to achieve a uniform finish.
3D scanning the original guard
Raw scan data of the component
CAD model used for manufacturing
Result
The completed replacement chain guard achieved excellent fitment, improved appearance, and durable performance. The final component allowed the motorcycle to be restored with a functional and high-quality replacement part ready for installation.
Finished replacement chain guard