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

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

Product Code: 00145
Availability: In Stock
Price: $6.95

These universal mounting hubs are designed to work with most 4 mm diameter shafts, including round shafts, and “D” shafts. Each of the two included hubs has four mounting holes for #4-40 screws (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 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.

The picture to the right shows a hub with Pololu’s 25:1 metal gearmotor 20Dx44L mm and a Pololu 20D mm metal gearmotor bracket. These hubs will work with any Pololu 20D mm metal gearmotor or 25D mm metal gearmotor, and they also work with 60 mm, 70 mm, 80 mm, and 90 mm Pololu wheels.

Pololu 20D mm gearmotor with bracket and hub.
Pololu 60×8mm wheel on a Pololu 25D mm metal gearmotor.

 

Pololu wheels with 90, 80, 70, and 60mm diameters in three colors: blue, red, and yellow.

Dimensions

Size: 19 mm diameter × 5 mm thick
Weight: 3.2 g1
Shaft diameter: 4 mm
Mounting hole size: #4-402

Notes:

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

 

File downloads

Pololu universal aluminum mounting hub for 4mm shaft, #4-40 holes mechanical drawing (33k pdf)
Printable mechanical drawing for the Pololu universal aluminum mounting hub for 4mm shaft, #4-40 holes.
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