Three-Way 8 mm Rod Corner Cube
A corner joint that ties three pieces of 8 mm smooth rod (or 8 mm tube/dowel) into a right-angle frame for a robot chassis, gantry or camera rig. Bores are 8.3 mm for a slip fit with 29 mm of rod engagement, offset inside the hub so all three rods clear one another, and each is locked by an M3 set screw in a 2.6 mm self-tapping hole. Arms are 18 mm square and 44 mm long; overall envelope 44 x 44 x 44 mm, about 26 cm3 of plastic.
robotics 8mm-rod chassis frame-joint