Dummy pedal for bicycle maintenance - redesign for FDM printers

cults3d

A redesign of my previous clone of the Park Tools DP-2 dummy pedal takes center stage, and this time around, several key changes are in play. The earlier design opted to use the same 5/16" thread for the shaft as its Park counterpart, a choice that proved to be a major misstep. The thread was simply too thin and far too weak. This latest iteration is an optimized version tailored specifically with FDM printers and their inherent limitations in mind. Gone are the days of the 5/16" thread - it's now all about the 9/16" threading, complete with a short threaded bit that allows you to avoid fully screwing it into the pedal. The threaded insert is compact and should be printed at 100% infill for maximum strength, but feel free to dial back on the infill for everything else. Assembly is straightforward: Insert the threaded component into the shaft, utilizing the Torx T30 found on both ends - though you might find it possible to thread it in by hand. Next, pass the shaft with its threaded insert through the handle, and then screw on the grip until it bottoms out. A quick spin test will confirm everything turns smoothly. Noteworthy is the decision to make the T30 in the threaded insert a thru-hole; should the worst happen and the insert break due to excessive force, this design feature makes removal of the remnant far easier, allowing for the installation of a fresh threaded insert. Keep a few spares on hand - it's those inserts that are most likely to fail. Also included is an STL file for a pegboard holder that will keep your dummy pedal within easy reach.