Improved MP Mini Stock Extruder Arm

thingiverse

This upgraded lever arm is specifically designed for use with the Monoprice Select Mini's stock extruder, requiring only one additional part: a readily available 5x11x4 bearing commonly found in local or online hobby shops, often used in RC cars (Traxxas 5116). A significant advantage of this design lies in its thicker and stronger bearing spindle, measuring 5mm compared to the original lever arm's 2-3mm. To install this arm, you'll need to use the original M3 hex axle bolt and bushing from the extruder, then simply drop on the bearing. Initially, I planned to add a press-fit cap over the bearing for added security, but it turned out that the bearing doesn't have a tendency to move upward anyway.