Instructional Material: 3d printed ball caster

This is a link to a 3d printed ball caster that uses a standard mouse ball (with rubber removed) for the metal ball bearing

http://www.thingiverse.com/thing:622701

Material Type: 
Model
Education Level: 
Middle School
High School
Focus Subject: 
Robotics Hardware
HW Platform: 
EV3
SW Platform: 
Any
Interactivity Style: 
Mixed