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Just 'Cuz Robotics

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

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

Regular price $7.00
Regular price $9.00 Sale price $7.00
Sale Sold out
Bore Size

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 22mm DC Gearmotor
  • Double Geared 25mm Motors
  • Any other 4mm, 5mm or 6mm shaft motors!


  • Material: 6061 Aluminum, strong and lightweight
  • Length: 0.3in (7.62mm), fits inside 1 inch (25.4mm) diameter circle
  • 4X M4 threads on a 0.75" bolt circle
  • Weights: 4mm ~ 3.03g, 5mm ~ 2.91g, 6mm ~ 2.75g including set screws!
  • Drawing below, all dimensions in inches [mm]

    Motors not included. 

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