In the exploration of pushing the limits of 3D printing, Adam Harig addressed the question of whether 3D-printed threads could serve as reliable alternatives to traditional metal inserts, especially in applications like connecting parts for an expensive camera. Using stand-in cubes printed in PLA+ with internal threads, he conducted a series of destructive tests varying infill from 10% to 100% and layer height at 0.2 mm. The tests involved pulling on a metal hook screwed into the plastic test items with a luggage/fishing scale until failure or reaching the scale’s limit.
The results revealed that the 100% infill version outperformed the 50% infill version, demonstrating greater strength. Adam found the 100% infill version robust enough to lift his entire camera off the table, instilling confidence in the design’s reliability. Notably, the testing highlighted the impact of peeling forces on layers, often causing the bottom layers to fail, which were not reinforced by the metal screw. While the study didn’t delve into dynamic loads, it suggested that 3D printing screw threads could be a viable and practical option for certain applications.
Read more: Putting 3D Printed Screw Threads To The Test
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