Printing threaded parts is a common practice in 3D printing, especially when the specifications of the thread are known. However, Shop Therapy faced a challenge when attempting to print parts compatible with an existing, unspecified thread. To tackle this, he utilized calipers to make precise measurements.
He commenced by measuring the height of the thread, initially rounding it up in the video, but later clarified in the comments that it actually needed to be slightly smaller for a proper fit. Subsequently, he measured the thread pitch, major diameter, and minor diameter. The pitch defines the distance between threads, the major diameter represents the outer edge of the threads, and the minor diameter refers to the inner portion without threads.
Armed with these measurements, he turned to Fusion 360 to design the matching cap. While there are various 3D CAD software options available, Fusion 360 is particularly advantageous for its thread-related functions, making it user-friendly for designing such components—though it isn’t entirely free, personal-use licenses are accessible.
Printing threads can be a mixed bag; alternatives such as embedding metal threads into prints are also popular among enthusiasts. For more insights on 3D printing, you can explore these articles on 3D printing, threads, and techniques for integrating metal threads into prints.