Pololu Universal Aluminum Mounting Hub for 4mm Shaft M3 Holes (2 Pack)

The Pololu universal aluminium mounting hub allows you to mount custom wheels and mechanisms to 4 mm motor shafts. The hubs are sold in pairs, and each hub includes one M3 set screw for securing a motor shaft to the hub. Each hub has four threaded holes for M3 screws (not included).

AUD$ 13.95

In stock in Australia  

Shipping from $2.90

+524 more from our supplier in 7-10 days

Our Code: MEC-30180

Supplier Link: [Pololu MPN:1997]



 These universal mounting hubs are designed to work with most 4 mm shafts, including round shafts, and “D” shafts. Each hub has four mounting holes for M3 screws, letting you mount custom wheels or mechanisms to your motors. M3 hex set screws (one included for each hub) allow secure coupling of shaft to hub. The kit includs set screws and a matching 1.5mm Hex Wrench (Allen Key) .

Kit Includes:

  • Two hubs
  • Set screws for fixing the hub to a shaft
  • 1.5mm Hex wrench to fit the set screws

The picture to the right shows a hub with Pololu’s 25:1 metal gearmotor 20Dx44L mm and a Pololu 20D mm metal gearmotor bracket. This hub will work with any Pololu 20D mm metal gearmotor.

We also stock M3 machine screws of various lengths that can be used to fit wheels to these hubs.

File Downloads

Pololu universal aluminum mounting hub for 4mm shaft, M3 holes mechanical drawing (34k pdf)

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