G scale Re-Railer

thingiverse

This is a re-railer designed for G scale model railways such as LGB, Bachmann etc. It was created to prevent cheap Chinese Nuquida coach copies from derailing on inverse curves. The re-railer uses four screws to hold and align the track in place. The screws used were 3.5mm by 16, and these extend just below the re-railer bottom surface for added stability. I have attached the 123D file so you can modify the design if your railway does not use LGB locos. Print Settings: Printer: Shapeoko Rafts: No Resolution: 0.2 layers, 0.4 nozzle Infill: 20% Notes: This was a challenging print to complete. Issues arose with clogged nozzles and dislodged print beds at specific heights. Adjusting the filament feed, improving bed location, and tightening the screws helped resolve these problems. Design Background: This is actually the ninth iteration of my design for this re-railer. I learned several key points during the process: A guide on the outside of the wheels would be helpful but is impractical due to LGB locomotive pickup extensions. Some engines have running gear parts that extend very close to the track. The standard back-to-back distance for G scale wheels is about 40mm, with 6mm wheels including flanges. The inner dimension of the re-railer must accommodate this distance while still allowing smaller cleaning wheels to pass through without binding. A centre diamond placed 2mm above the rails helps align the wheels as they re-rail. Higher placement would be beneficial but may foul on other low-lying parts of LGB locomotives. I have attached the 123D file for you to modify if needed based on your railway setup.