Quad block bearing mounts attach to the inside of a channel and have a ball bearing with a 3/8 inch bore for shafts. These bearing mounts have a width of 1.32 inch, a thickness of 0.25 inch, a 0.375 inch bore bearing, and utilize the 0.77 inch hub pattern.
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.