# Pololu Universal Aluminum Mounting Hub for 3mm Shaft, \#2-56 Holes (2-Pack)

**Type:** Product page · **SKU:** POLOLU-1079 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-3mm-shaft-2-56-holes-2-pack.html ([markdown](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-3mm-shaft-2-56-holes-2-pack.html.md))

These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 3 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 #2-56 screws (not included).

## Pricing

- **Price:** $15.95 (inc GST) — $14.50 AUD, exc GST
- **Quantity discounts:** 10+ $13.92 (exc GST) · 25+ $13.48 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 26.

## Description

| [![](https://core-electronics.com.au/media/remote_images/0J1092.250_ZcLhF8.jpg%3Ff9728619de096d6b350a4e9d3e355cb9)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_QzigvU.png)](https://core-electronics.com.au/#) |
|---|
| Mini gearmotor with bracket and hub. |

These universal mounting hubs are designed to work with most [3 mm diameter shafts](https://core-electronics.com.au/#), including round shafts, “D” shafts, and [Tamiya’s 3 mm hexagonal shafts](https://core-electronics.com.au/#). Each of the two included hubs has four mounting holes for [\#2-56 screws](https://core-electronics.com.au/machine-screw-2-56-7-16-length-phillips-25-pack.html) (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](https://core-electronics.com.au/hex-allen-wrench-0-05.html) (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 one of Pololu’s [mini metal gearmotors](https://core-electronics.com.au/catalog/product/view/sku/POLOLU-990) and a [Pololu mini metal gearmotor bracket](https://core-electronics.com.au/catalog/product/view/sku/POLOLU-1080). These hubs will work with any Pololu mini/15.5D mm metal gearmotor or [micro metal gearmotor](https://core-electronics.com.au/#), and they also work with 60 mm, 70 mm, 80 mm, and 90 mm [Pololu wheels](https://core-electronics.com.au/#).

| [![](https://core-electronics.com.au/media/remote_images/0J2763.300_ABQ6wg.jpg%3F05b54bb3db229f67c35850795c461ea9)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_QzigvU.png)](https://core-electronics.com.au/#) |
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| Pololu wheels with 90, 80, 70, and 60mm diameters in three colors: blue, red, and yellow. |

Dimensions:

- 18mm diameter
- 13mm diagonal spacing
- 3mm central shaft diameter
- M1.5 Wheel mounting holes
- 3x M2.5 Grub Screws (Allen Key included)

**Documents:**

- [Dimensional Drawing](https://core-electronics.com.au/attachments/localcontent/1079-3mm-2-56-hub-dimensions_32383e56091.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/o/pololu_universal_aluminum_mounting_hub_for_3mm_shaft_2_56_holes__2_pack___pololu_1079__00.jpg)