Pololu Universal Aluminium Mounting Hub for 4mm Shafts - #4-40 Holes (2-Pack)
These Pololu universal aluminium mounting hubs allow you to mount custom wheels and mechanisms to 4mmĀ 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 4mm diameter shafts, including round shafts and āDā shafts.
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.
The product images show a hub with PololuāsĀ 25:1 metal gearmotor 20Dx44LĀ and aĀ Pololu 20D metal gearmotor bracket. These hubs will work with any 20D metal gearmotor orĀ 25D metal gearmotor, 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: 4mm
- Mounting hole size: #4-40**
*For a single hub only (without set screw)
**This is also the size of the set screw
Original: $14.43
-70%$14.43
$4.33



Description
These Pololu universal aluminium mounting hubs allow you to mount custom wheels and mechanisms to 4mmĀ 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 4mm diameter shafts, including round shafts and āDā shafts.
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.
The product images show a hub with PololuāsĀ 25:1 metal gearmotor 20Dx44LĀ and aĀ Pololu 20D metal gearmotor bracket. These hubs will work with any 20D metal gearmotor orĀ 25D metal gearmotor, 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: 4mm
- Mounting hole size: #4-40**
*For a single hub only (without set screw)
**This is also the size of the set screw



















