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.
YDLIDAR X4 LIDAR - 360-degree two-dimensional 10 meter laser range scanner (LIDAR).
This is a prebuilt version of TP-251-003, our programmable triangular omni wheel vectoring robot. It can vector in any direction and is great for indoor robotics. An Arduino Mega and encoders allow for this to be an autonomous robot.