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. The set includes one Allen wrench and two 4-40 set screws for securing the hubs to motor shafts. Each hub has four mounting holes for 4-40 screws (not included).
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| Mechanical drawing for the Pololu universal aluminum mounting hub for 6 mm shaft. |
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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 (not included), 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. A 0.05" hex wrench (often the smallest size in SAE Allen wrench sets) is included for use with the set screws.
The picture to the right shows a hub with Pololu’s 19:1 metal gearmotor 37Dx52L mm and a Pololu 37D mm metal gearmotor bracket. This hub will work with any of our 37D mm metal gearmotors.
 | | Gearmotor with bracket and hub. |
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 | | Black Pololu 90×10mm wheel on a Pololu 37D mm metal gearmotor. |
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