Silvercrest SSM 550 D1 Blender Rotor Gear

thingiverse

This little gear is what gives movement to the blades of the blender. It moves with a square nut with reversed thread. After some time the plastic gear gap for the nut became rounded, so the blades stopped turning. To change the gear one must cut the damaged gear of the blender. Except if you are lucky enough and the square nut comes off easily. To tighten the nut use only your hand. The reverse thread will do the rest.