These collars clamp to a 0.25 inch shaft and feature a lip edge which helps eliminate friction when used with a ball bearing. Simply slide them on and tighten the 6-32 x 0.375 inch screw. These clamp collars have a bore of 0.25 inch, a width of 0.375 inch, and a thickness of 0.25 inch.
Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range of components makes building complex electromechanical prototypes or finished projects a reality.