This plastic roller ball is a great third contact point for a small, differential-drive robot. They are sold in threes.
Compare all products in Wheels, Tracks, and Ball Casters.
- How many Ball Caster Trios do I buy if I want, for example, 10 ball casters?
- The Ball Caster Trio is a set of three of our plastic ball casters. If you need 10 ball casters, you should buy four Ball Caster Trios (you would receive a total of 12 ball casters).
- What type of load can this ball caster handle?
- This is an inexpensive plastic ball caster meant for use with small science projects or small indoor robots. It has no bearings and will stop rolling if there is too much weight applied. This caster is not meant for industrial use and is not rated for any specific load, but it might be able to roll while supporting a few ounces (a pound is probably too much). If in doubt, please give them a try and see if they will work for your application.