5th Prize GrabCAD and Velodroom
grabcad
A versatile tool for cyclists functions as a wrench, two crowbars, and more, perfect for bikes. This wrench features a clamp to hold an assembly together, with one clamp sufficient but two desired for added rigidity. The middle of the wrench allows for removal of the clamp and disassembly of parts 1 and 2. Part 1 contains two standard parallel pins (ISO 8734 - 2 x 10) fixed within itself, while part 2 has drilled holes tolerated at 2.3mm center distance. This provides a minimum 0.2mm jaw distance gap between holes. Moving the pins to the next holes adjusts the jaws from 0 to 2mm and 1 to 3mm openings, respectively. The mathematical concept behind this is that 2.3mm represents the hypotenuse of a triangle, while the cathetus represents the jaw's touch point with the nut or bolt head. Smaller parallel pin diameters are an option for easier drilling, and even a single row of holes may suffice in the middle. This functionality can also be applied in inches.
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