Pololu Universal Aluminium Mounting Hub for 6mm Shafts - M3 Holes (2-Pack)

PololuSKU: POL-1999
Sale price £9.80
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PololuPololu Wheel 80x10mm Pair - Black
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These Pololu universal aluminium mounting hubs allow you to mount custom wheels and mechanisms to 6mm diameter motor shafts

The set includes two hubs, four M3 set screws for securing the hubs to motor shafts, and one 1.5mm Allen wrench for use with the set screws. Each hub has six threaded mounting holes for M3 screws (not included).

We have an assortment of universal mounting hubs available, spanning several shaft sizes and featuring mounting holes threaded for metric or imperial screws. These universal mounting hubs are designed to work with most 6mm diameter shafts, including round shafts and “D” shafts.

Each of the two included hubs has six mounting holes for M3 screws (not included), letting you mount custom wheels or mechanisms to your motors. The four included M3 hex set screws (two for each hub) allow secure coupling of shaft to hub, with the longer set screws intended for the deeper of the two set screw holes. A 1.5mm hex wrench is included for use with the set screws.

The product images show a hub with Pololu’s 19:1 metal gearmotor 37Dx52L mm and a Pololu stamped aluminium L-bracket for 37D mm metal gearmotors. These hubs will work with any 37D mm metal gearmotors, and they also work with 80mm, and 90mm Pololu wheels.


  • Size: 25.4mm mm diameter × 9.2 mm thick
  • Weight: 6.8g*
  • Shaft diameter: 6mm
  • Mounting hole size: M3**

*For a single hub only (without set screw)
**This is also the size of the set screws

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