These universal aluminium mounting hubs allow you to mount custom wheels and mechanisms to 1/4 inch (6.35 mm) 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.
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Our Code: SKU-002953
Supplier Link: [Pololu MPN:1993]
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 1/4 inch (6.35 mm) 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 six threaded mounting holes for #4-40 screws (not included).
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 six 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, with the longer set screws intended for the deeper of the two set screw holes. 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.
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 | ||||||||
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| 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 |
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| 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 | – | – | – | |||||||||
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| Size: | 25.4 mm diameter × 9.2 mm thick |
|---|---|
| Weight: | 6.7 g1 |
| Shaft diameter: | 0.250 in |
| Mounting hole size: | #4-402 |
Printable mechanical drawing for the Pololu universal aluminium mounting hub for 1/4 inch shaft, #4-40 holes.
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