EMAX 250 Quadcopter Arm Replacement

thingiverse

I love this arm! The design is closely based on the original EMAX 250, and with a solid resin print, it weighs only 14 grams versus the 10 grams for the original carbon fiber. This arm does not require the use of a spacer :D I left a handy access area where the arm connects to the quad's frame, so you won't need to unsolder your ESC wires when replacing a broken arm. The wires will fit straight through giving you a tidy assembly without fuss. Although it was first created using a Form1, the part shown in the pictures was printed using a resolution of only 200 microns, so I don't see why it can't be made using many other printer types. Please let me know if you try it. Print Settings Printer Brand: Formlabs Printer: Form 1 Rafts: Doesn't Matter Supports: Yes Resolution: 200 microns Post-Printing If using an UV curable resin... If using an UV curable resin (e.g., Form1 printers), it is highly recommended that you paint the part to protect it from direct sunlight. Otherwise the part may become brittle and break. How I Designed This Broken Arms When you start flying more aggressively and taking chances at greater speeds, the crashes will become less forgivable. Even using carbon fiber, broken arms will happen. Why not experiment by printing your own? They are easy to make, easy to replace, and work great. I designed this using a caliper to take measurements off of my existing, good arms. The thickness and the 2 independent outline ribs were adjusted for strength and weight.