OS 50-55 Size Crank lock tool
thingiverse
Tool for locking the crank on a nitro or gas rc engine when installing or removing the fan (or prop). Print solid and 5 perimiters. PETG should work, I used PC+ and its solid! I also have one for 91-105 Size. https://www.thingiverse.com/thing:5078964 Tested on OS MAX 55HZ Hyper. Please leave a comment on what motor you used it for. Happy printing, and flying :)
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