Pololu Universal Aluminum Mounting Hub for 5mm Shaft, #4-40 Holes (2-Pack)

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Pololu item #: 1203
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant


These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 5 mm diameter motor shafts. The set includes two hubs, two #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:

Alternatives available with variations in these parameter(s): shaft diameter mounting hole size Select variant…

Compare all products in Pololu Universal Mounting Hubs.

Pictures

5mm Pololu universal aluminum mounting hub on a stepper motor with a 5mm-diameter output shaft.




Overview

These universal mounting hubs are designed to work with most 5 mm diameter shafts, including round shafts and “D” shafts, such as those on our 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 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.

Pololu Universal Aluminum Mounting Hub family

We have an assortment of hubs available for various shaft sizes and with different mounting hole thread options. Each Universal Mounting Hub is compatible with a variety of our wheels as detailed in the following table:

Pololu Universal Mounting Hubs
for 3mm shafts for 4mm shafts for 5mm shafts for 6mm shafts for 1/4″ shafts for 8mm shafts
M3 holes
#4-40 holes
#2-56 holes 		M3 holes
#4-40 holes
  		M3 holes
#4-40 holes
  		M3 holes
#4-40 holes
  		M3 holes
#4-40 holes
  		M3 holes
 
 

Pololu Wheels for 3mm Shafts		 32×7mm – – – – – –
40×7mm – – – – – –
60×8mm – – –
70×8mm – – –
80×10mm
90×10mm

Pololu Wheels for Servos		 40×7mm – – – – – –
60×8mm
70×10mm – – –
90×10mm – – –

Pololu Multi-Hub Wheels		 80×10mm – – –

White Pololu Wheel 60×8mm on a Pololu 20D mm Metal Gearmotor.

Black Pololu Wheel 90×10mm on a Pololu 37D mm Metal Gearmotor.

Dimensions

Size: 19 mm diameter × 5 mm thick
Weight: 3.2 g1
Shaft diameter: 5 mm
Mounting hole size: #4-40

Notes:

1
For a single hub only (without set screw).

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