Mechanical rotate

The overall project is to make a robot about 75cm tall. To begin, I identified 2 types of movement for all joints (other than eyes and hands). This part of the project is for joints such as rotate movement.

For other type of movement, go to: https://www.thingiverse.com/thing:3091483

Printed parts:
- 1x Rotate-A: Servo mount
- 1x Rotate-B: Any receiving bone adapted to change as needed
- 2x Rotate-C-2X: 2 pieces receiving axle bloc
- 2x Rotate-D-2X: 2 pieces for the bearing and the rotate axle transmission
- 1x Rotate-E: Axle transmission
- 1x Rotate-F: Rotate join between axle and Servo

Non-printed parts:
- 1x SG90 servo motor
- 1x Bearing 8x12x3.5
- 10x M2.5 8mm screws
- 8x M2.5 nuts

Steps:
1- Slide the bearing onto the rotation shaft "Rotate-E". Use pliers as needed. It's tightening in order to fully utilize the functionality of the bearing.
2- Insert the rotation axis "Rotate-E" between the two parts "Rotate-C-2X"
3- Place the 4