Pololu Universal Aluminum Mounting Hub for 3mm Shaft 2-56 Holes (2-Pack)Pololu
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These universal mounting hubs are designed to work with most 3mm shafts, including round shafts, “D” shafts, and Tamiya’s 3mm hexagonal shafts. Each hub has four mounting holes for 2-56 screws (not included), letting you mount custom wheels or mechanisms to your motors. 4-40 hex set screws (one 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.
These hubs will work with 60 mm, 70 mm, 80 mm, and 90 mm Pololu wheels.
- Shaft diameter: 3mm