Pololu Universal Aluminum Mounting Hub for 4mm Shaft, M3 Holes (2-Pack)Pololu
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These universal mounting hubs are designed to work with most 4 mm shafts, including round shafts, and “D” shafts. Each of the two included hubs has four mounting holes for M3 screws (not included), letting you mount custom wheels or mechanisms to your motors. The two included M3 hex set screws (one for each hub) allow secure coupling of shaft to hub, and a 1.5 mm hex wrench is included for use with the set screws. A dimension diagram of the hub is available under the resources tab.
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 or 25D mm metal gearmotor, and it also works with 60 mm, 70 mm, 80 mm, and 90 mm Pololu wheels.
- Size: 19 mm diameter × 5 mm thick
- Weight: 3.2 g1
- Shaft diameter: 4 mm
- Mounting hole size: M32
- 1. For a single hub only (without set screw).
- 2. This is also the size of the set screw.