This is a single axle with a hub that mounts to our 6" pneumatic tires or our 6" solid core tires. The end opposite the hub is bored to fit an 8mm shaft. It is intended to be direct driven by our IG42 motors. The hub is welded to a steel 5/8" diameter shaft.
Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor.
100 pack of square cable tie mounts with adhesive backing. 3/4 inch.