Pololu Universal Aluminum Mounting Hub for 6mm Shaft (#4-40 Holes 2-Pack)

Product Code: 0538
Manufacturer Part Number: 1083
Manufacturer: Pololu
Availability: In Stock
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These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 6 mm diameter motor shafts. The set includes two hubs, four #4-40 set screws for securing the hubs to motor shafts, and one 0.05″ Allen wrench for use with the set screws. Each hub has six threaded mounting holes for #4-40 screws (not included).

These universal mounting hubs are designed to work with most 6 mm diameter shafts, including round shafts and “D” shafts. Each of the two included hubs has six mounting holes for #4-40 screws (not included), letting you mount custom wheels or mechanisms to your motors. The four included #4-40 hex set screws (two for each hub) allow secure coupling of shaft to hub, and a 0.05″ hex wrench (often the smallest size in SAE Allen wrench sets) is included for use with the set screws. A dimension diagram of the hub is available under the resources tab.


Size: 25.4 mm diameter × 9.2 mm thick
Weight: 6.8 g1
Shaft diameter: 6 mm
Mounting hole size: #4-402


1. For a single hub only (without set screws)
2. This is also the size of the set screws

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