Pololu Universal Aluminum Mounting Hub for 1/4″ Shaft, #4-40 Holes (2-Pack)

Pololu Universal Aluminum Mounting Hub for 1/4″ Shaft, #4-40 Holes (2-Pack)
Pololu item #: 1993 548 in stock

Price break Unit price (US$)
1 7.95
10 6.99


backorders allowed

These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 1/4 inch 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 four threaded mounting holes for #4-40 screws (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:

Select options:
 Description Specs (4) Pictures (2) Resources (1) FAQs (0) On the blog (2) 

1/4″ Pololu universal aluminum mounting hub on a NEMA 23 stepper motor with 1/4″-diameter output shaft.

These universal mounting hubs are designed to work with most 0.250 inch (6.35 mm) shafts, including round shafts and “D” shafts, such as those on our NEMA 23 stepper motors. 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 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.

These hubs will work with our NEMA 23 stepper motors, and they also work with 80 mm and 90 mm Pololu wheels.

People often buy this product together with:

DRV8825 Stepper Motor Driver Carrier, High Current DRV8825 Stepper Motor Driver Carrier, High Current
Pololu Universal Aluminum Mounting Hub for 5mm Shaft, #4-40 Holes (2-Pack) Pololu Universal Aluminum Mounting Hub for 5mm Shaft, #4-40 Holes (2-Pack)
Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 57×41mm, 5.7V, 1 A/Phase Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 57×41mm, 5.7V, 1 A/Phase