3D Robotics Multirotor Reinforced motor fixing

thingiverse

A durable fix for 3D robotics multirotor frames. Many times I've encountered uncontrolled landings with my drone (sometimes upside-down!). Upon inspection, aluminum arms where motors are bolted on reveal bent limbs, significantly weakening the frame. In extreme cases, motors can become loose and detach completely. Two parts and two M3x25mm Alen head bolts completely solve this issue. The main part inserts into the box section, making aluminum considerably stronger. Two lugs hold it in place during assembly. The second part attaches to the tube's bottom, working like a nyloc nut. Bolt heads dig into plastic, preventing loose vibration. This design is single-use; replace if removing and refitting the motor. Each fix includes only one attachment point, requiring four or six printed copies for quadcopters or hexacopters. Motor fixings are significantly stronger and more stiff than standard 3D Robotics designs, resulting in improved stability. When printing, remember to leave a little extra space inside the part to account for shrinkage, otherwise you might need to remove some of the bottom to prevent flanging. Ensure the print fits snugly inside the aluminum box section without flanging or excessive force when inserting. Trimming with a knife may be necessary if there's excessive print at the bottom, but do not apply excessive pressure, as this can damage the surrounding material and result in unnecessary waste. Trim any excess plastic before assembling to avoid damaging surrounding components during assembly