Modular Robotic System - Standard Servo Pivot Joint

This is a pivot joint for robotic applications which is designed to be used with the standard size servo MG996r or MG995.

The pivot joint has a gear ratio of 3:1 so the range of motion will only be about 60° with a standard servo. But with an easy servo hack and some additional printed parts it is possible to use the whole 180°. Therefore the potentiometer of the servo has to be removed from the servo housing and flanged directly to the shaft of the joint. Don't forget to swap Vcc and GND due to the reversal of rotation.

Needed for the standard 60° range of motion:
Parts:
-- body
-- large gear
-- small gear
Materials:
-- 1x MG996r or MG995 Servo incl. attachments
-- 2x 625 5mmx16mmx5mm Ball Bearing
-- 1x M4x49mm threaded rod
-- 4x M4 Nut

Additionally needed to use the full range of motion (requires servo hack):
Parts:
-- poti replacement
-- poti hub
-- poti flange
-- end stop (optional for protecting potentiometer)
Materials:
-- 4x 2,6x8mm self tapping screw (f