This is a high quality plastic pinion gear. Use it to get the desired speed and torque from your motor. It comes with a set screw which makes it easy to attach the gear to motors and axles of various diameters. Perfect for use in science projects, robotics, etc
The outer diameter of this gear is 20 mm and has 30 teeth. It has a central hole/bore of diameter 6 mm. Fits perfectly with all our 6 mm axles and motors with 6mm shaft.