3D-printable High torque servo/gear reduction

myminifactory

I'm a Text Rewriting Bot, here is the rewritten text: Video can be found here: https://www.youtube.com/watch?v=8sq4pHdSXYM. This servo/gear reduction uses mostly 3D-printed parts. A 775 36V 9000rpm brushed DC-motor powers the servo, which is driven by a BTS7960B motor driver controlled by an Arduino Mega 2560. The stall torque of the servo is about 55kg/cm or 5.39 Nm. Peak current reaches approximately 18 amps when using a 6s LIPO battery (about 22-24V). The reduction ratio is 1:30. Originally, I wanted to use 20mm ball bearings for the output shaft but they didn't arrive in time, so I used two 20mm holes and a lot of lubrication instead. To film the internals of the servo for possible failures, I printed colored gears and laser-cut a 5 mm acrylic lid. Unfortunately, I didn't get to capture any awesome footage of gears exploding because they were too strong. Even at a peak torque of 54kg/cm, they showed no signs of flexing or cracking. The two middle gears (blue and red ones) use a stainless steel shaft with a 6mm diameter. The holes in the gears are designed for a 6.2mm diameter so they fit nicely around the 6mm shaft but some additional filing/sanding might be required. The same may be necessary for the 20mm shaft holes. Components used: 1 x 775 Motor DC 12V-36V 3500-9000RPM Motor Large Torque High Power Motor - https://www.banggood.com/775-Gear-Motor-DC-12V-36V-3500-9000RPM-Motor-Large-Torque-High-power-Motor-p-1091058.html?rmmds=search&cur_warehouse=CN 1 x Arduino Nano V3 - https://www.banggood.com/Geekcreit-ATmega328P-Nano-V3-Module-Improved-Version-With-USB-Cable-Development-Board-For-Arduino-p-933647.html?p=E01411629100201406T1&custlinkid=255135 1 x L298N Motor Driver - https://www.banggood.com/Wholesale-Dual-H-Bridge-DC-Stepper-Motor-Drive-Controller-Board-Module-Arduino-L298N-p-42826.html?p=E01411629100201406T1&custlinkid=255131 1 x Heat Shrinks - https://www.banggood.com/328pcs-Heat-Shrink-Tubing-Insulation-Electrical-Shrinkable-Tube-Sleeve-Cable-21-p-1362019.html?p=E01411629100201406T1&custlinkid=669227 2 x Stainless Steel Shafts - 6mm diameter, 70mm length 2 x M5 Bolt and Nut - 40mm length 1 x 20mm Steel Tube - 125mm length 2 x Screws 15mm Length - 4.5mm diameter, 15mm length 5 x Screws 35mm Length - 4.5mm diameter, 35mm length Video can be found here: https://www.youtube.com/watch?v=8sq4pHdSXYM. More info can be found here: https://hackaday.io/project/162855-3D-Printable-High-Torque-Servo-Gear-Reduction. All my project files, instructions, schematics are provided for free so everyone around the world can enjoy them. Feel free to support me so I can create and share even more awesome projects. Any amount of support is greatly appreciated - paypal.me/BrianBrocken. Have a nice day!