Quadcopter Brushless Motor Wrench
thingiverse
Edit: Now in TWO sizes, check the files 27mm and 23mm diameter motors. (ie. 27mm = 2204/2206 sizes, 23mm = 1804/1806 sizes) Motor wrench I made for my quadcopter to easy changing propellers without having to grip really hard. You can scale it to your specific motor size. I scaled one down for smaller 23mm diameter sized motors. The original is for a 27mm diameter motor. You WILL need supports or else the joint will collapse. Need the design tweaked for your specific motor? Let me know the dimensions.
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