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These universal mounting hubs are designed to work with most 5 mm shafts, including round shafts and “D” shafts, such as those on our stepper motors. 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.
This hub will work with most of our stepper motors (the ones with 5 mm shafts), and it also works with 60 mm, 70 mm, 80 mm, and 90 mm Pololu wheels.

Specifications:
Dimensions:
  • Size: 19 mm diameter × 5 mm thick
  • Weight: 3.2 g1
  • Shaft diameter: 5 mm
  • Mounting hole size: M32
Notes:
  • 1. For a single hub only (without set screw).
  • 2. This is also the size of the set screw.
Documents: