NaBi is a novel robot developed at UCLA by Dennis Hong’s Robotics and Mechanisms Laboratory (see this article <a target="_blank" rel="noopener noreferrer" href="https://spectrum.ieee.org/automaton/robotics/humanoids/nabiros-makes-us-wonder-why-we-all-dont-walk-sideways">https://spectrum.ieee.org/automaton/robotics/humanoids/nabiros-makes-us-wonder-why-we-all-dont-walk-sideways</a> for a good overview).This project is based on the NaBi design but with 3D printed parts and power by the 8BitRobots module (<a target="_blank" rel="noopener noreferrer" href="https://hackaday.io/project/152729-8bitrobots-module">https://hackaday.io/project/152729-8bitrobots-module</a>).
Below is the design for the servo mount which makes the knee of NaBi's legs.
The six 3d printed parts wrap around a standard sized servo, and provides connection points for the upper and lower leg rods. The design also requires a bearing at the top to spread the weight and stress to both sides of the joint, not just the place where it attaches to the servo horn.