Mini Servo Rotational Bracket

thingiverse

This bracket securely holds a popular mini-servo used in robotics and electro-mechanical applications, such as the Tower Pro MG90 or MG90S. It accommodates a Tower Pro MG90S all-metal gear servo (and others of this standard size) and its base plate, which rotates to turn the servo drive sprocket centered on rotation of the base plate. Note that this version does not allow the servo to be screwed into it because in my usage I attach a part of a robot arm directly to the servo itself. This bracket holds the servo firmly in place with a second piece by friction. A circular mounting plate is centered on the other side of where the mini servo would have its shaft, making this a useful component for a robot wrist to hold it and twist it. This design could also hold a servo for another arm or for the servo that actuates a gripper, as seen in thing 2303095 or thing 7109. Many grippers use mini servos oriented similarly, so this bracket can be used to hold them securely. The orientation for printing is shown in the STL picture, requiring no supports. There are two holes at the open end of the main bracket where the little holder pieces are secured with M2.5x6mm tapping screws that are 20mm long. To ensure a snug fit, it can be helpful to use masking or thicker gaffer tape around the part of the servo that goes into this mount if it's loose due to slightly different body sizes.