

Pololu Universal Aluminium Mounting Hub for 5mm Shafts - #4-40 Holes (2-Pack)
These Pololu universal aluminium mounting hubs allow you to mount custom wheels and mechanisms to 5mmĀ diameter motor shafts.
The set includes two hubs, two #4-40 set screws for securing the hubs to motor shafts, and oneĀ 0.05ā³ Allen wrenchĀ for use with the set screws. Each hub has four threaded mounting holes for #4-40Ā screwsĀ (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 5mm diameter shafts, including round shafts and āDā shafts, such as those found on many stepper motors.
Each of the two included hubs has four mounting holes for #4-40Ā screwsĀ (not included), letting you mount custom wheels or mechanisms to your motors. The two included #4-40 hex set screws (one for each hub) allow secure coupling of shaft to hub, and aĀ 0.05ā³ hex wrenchĀ (often the smallest size in SAE Allen wrench sets) is included for use with the set screws.
These hubs will work with most of ourĀ stepper motorsĀ (the ones with 5mm shafts), and they also work with 60mm, 70mm, 80mm, and 90mmĀ Pololu wheelsĀ (excluding theĀ Multi-Hub versions; see the individual wheel pages for compatibility details).
Specifications
- Size: 19 mm diameter Ć 5 mm thick
- Weight: 3.2g*
- Shaft diameter: 5mm
- Mounting hole size: #4-40
*For a single hub only (without set screw)
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
These Pololu universal aluminium mounting hubs allow you to mount custom wheels and mechanisms to 5mmĀ diameter motor shafts.
The set includes two hubs, two #4-40 set screws for securing the hubs to motor shafts, and oneĀ 0.05ā³ Allen wrenchĀ for use with the set screws. Each hub has four threaded mounting holes for #4-40Ā screwsĀ (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 5mm diameter shafts, including round shafts and āDā shafts, such as those found on many stepper motors.
Each of the two included hubs has four mounting holes for #4-40Ā screwsĀ (not included), letting you mount custom wheels or mechanisms to your motors. The two included #4-40 hex set screws (one for each hub) allow secure coupling of shaft to hub, and aĀ 0.05ā³ hex wrenchĀ (often the smallest size in SAE Allen wrench sets) is included for use with the set screws.
These hubs will work with most of ourĀ stepper motorsĀ (the ones with 5mm shafts), and they also work with 60mm, 70mm, 80mm, and 90mmĀ Pololu wheelsĀ (excluding theĀ Multi-Hub versions; see the individual wheel pages for compatibility details).
Specifications
- Size: 19 mm diameter Ć 5 mm thick
- Weight: 3.2g*
- Shaft diameter: 5mm
- Mounting hole size: #4-40
*For a single hub only (without set screw)





















