Just 'Cuz Flange Hubs (4, 5, and 6mm bore)

Three Grams of Mighty Holding Power! If you need maximum torque transfer from a motor to a 3D printed wheel, pulley, arm, or gear, these flange hubs are perfect for you! Designed to work with a wide range of motors including 4mm and 6mm DartBox Gearmotors as well as 5mm shaft brushless motors. Made from strong yet lightweight 6061 aluminum, at 1/3rd the weight of brass or steel, these hubs will fit in well on almost any bot! These secure to a shaft with two M4 screws, make sure to align one or both with a flat on the shaft for best results.  CAD models included here. Each package contains one (1) hub, and two (2) M4 x 4mm set screws! These hubs are compatible with: DartBox Viper & Dragon Drive and HR 4mm + 6mm Gearmotors DartBox Gecko 4mm + 6mm Gearmotors Just 'Cuz 2306 1000kv Brushless Motors Servocity Premium Planetary Gear Motor Servocity Econ Spur Gear Motor Rectified Robotics Brushless Gearmotor Repeat Robotics Repeat Max Gearmotor Fingertech Mega Spark Gearmotor Botkits 22m