Pololu Universal Aluminum Mounting Hub for 6mm Shaft Pair #4-40 Holes

The Pololu universal aluminum mounting hub allows you to mount custom wheels and mechanisms to 6 mm motor shafts. The hubs are sold in pairs, and each hub includes two 4-40 set screws for securing a motor shaft to the hub.


Our supplier is out of stock

Our Code: MEC-30027

Supplier Link: [Pololu MPN:1083]





These universal mounting hubs are designed to work with most 6 mm shafts, including round shafts and “D” shafts. Each hub has six mounting holes for 4-40 screws, letting you mount custom wheels or mechanisms to your motors. 4-40 hex set screws (two included for each hub) allow secure coupling of shaft to hub. The kit includs set screws and a matching 0.05" hex wrench .

Kit Includes:

  • Set screws for fixing the hub to a shaft
  • 0.05" Hex wrench to fit the set screws
We also stock #4-40 machine screws of various lengths that can be used to fit wheels to these hubs.

The picture to the right shows a hub with Pololu’s 29:1 metal gearmotor 37Dx52L mm and a Pololu 37D mm metal gearmotor bracket. This hub will work with any of our 37D mm metal gearmotors.


Mechanical drawing for the Pololu universal aluminum mounting hub for 6 mm shaft.