These ball casters make a good third wheel for 3 wheeled robots, or you can use 2 for more balance.
With the Ball Caster, your project can pivot and move in almost any direction. There are two ball casters included, and height can be adjusted for various applications and projects.
The wheels are 3.5" in diameter and about 7/8" thick. They are modified to fit a splined servo shaft such as the HiTec standard servos.
100 pack of square cable tie mounts with adhesive backing. 3/4 inch.
Indoor GPS Starter Kit featuring one Modem and five Beacons to get your project running. Accurately position your robot to a couple centimeters indoors! Kit includes 4 standard beacons and 1 beacon with built in IMU.