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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. 
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, 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. The included set screws require a 0.05" hex wrench that we also stock if you need one. This is often the smallest size in SAE Allen wrench sets. We also stock #4-40 machine screws of various lengths that can be used to fit wheels to these hubs.
The picture to the right shows a hub with Pololu’s 29:1 metal gearmotor 37Dx52L mm and a Pololu 37D mm metal gearmotor bracket. This hub will work with any of our 37D mm metal gearmotors.
Mechanical drawing for the Pololu universal aluminum mounting hub for 6 mm shaft. File downloads |
