# MAXHubs

## MAXHubs

![](/files/uDwHDnsAojwfguxDfQ2H)

MAXHubs [(Product Family Page)](https://www.revrobotics.com/MAXHubs/) provide a way to transfer torque to a MAXSpline pattern from shafts of various shapes and sizes. Other MAXHub variants allow for different bores or structural patterns to populate within an existing MAXSpline. MAXHubs are available in plastic and aluminum. 

{% hint style="info" %}
Check out our application example [Traction Wheel with Aluminum MAXHub](/ion-build/onshape-examples/low-complexity.md#traction-wheel-with-aluminum-maxhub-onshape-file) using two #10 Socket Head Cap 1-1/4in Screws and a Traction Wheel - 4in - MAXSpline - Hard ([REV-21-2424](https://www.revrobotics.com/ION-Traction-Wheels/)).
{% endhint %}

#### Specifications

<table data-full-width="false"><thead><tr><th width="196">MAXHub</th><th width="157">Outside Diameter </th><th width="148">Width</th><th width="98">Bore</th><th>Weight</th><th width="160">Material </th></tr></thead><tbody><tr><td>1/2in Hex - Plastic</td><td>34.9mm (1.375in)</td><td>8.6mm (0.34in)</td><td>1/2in Hex</td><td>5g (0.01lb)</td><td>Glass-Filled Nylon</td></tr><tr><td>1/2in Hex - Aluminum</td><td>34.9mm (1.375in)</td><td>8.6mm (0.34in)</td><td>1/2in Hex</td><td>11g (0.02lb)</td><td>Aluminum</td></tr><tr><td>5mm - Plastic</td><td>34.9mm (1.375in)</td><td>8.6mm (0.34in)</td><td>5mm Hex</td><td>6g (0.01lb)</td><td>Glass-Filled Nylon</td></tr><tr><td>Structural</td><td>34.9mm (1.375in)</td><td>4.7mm (0.18in)</td><td>-</td><td>10g (0.02lb)</td><td>Aluminum</td></tr><tr><td>Double Sided</td><td>34.9mm (1.375in)</td><td>14.3mm (0.56in)</td><td>1in</td><td>5g (0.011lb)</td><td>Glass-Filled Nylon</td></tr></tbody></table>

## Locking MAXHubs

<figure><img src="/files/chsIIasQ0wk7vTAcOjgL" alt=""><figcaption></figcaption></figure>

The Locking MAXHub - 1/2in Hex is a compact, dual plate hub system designed to secure 1/2in hex shafting inside any MAXSpline bore component. Each kit includes two identical wedge locking plates and the necessary #10-32 hardware. When the plates are drawn together, their internal geometry twists and expands to simultaneously clamp onto the 1/2in hex shaft and the outer MAXSpline bore.

<figure><img src="/files/EHdS8vx39ULdmR66rOVE" alt="" width="360"><figcaption></figcaption></figure>

Each plate features three #10 clearance holes and three matching #10-32 threaded holes. This layout allows the included button head screws to tighten from either direction, making the MAXHub easy to install even in tight assemblies. While only three screws are required for locking, all six can be installed for added security. Once preloaded, the hub requires only a small quarter turn to fully lock or unlock, enabling quick adjustments and service. The result is a space efficient and highly reliable solution for securing wheels, sprockets, and other MAXSpline bore components to 1/2in hex shafts.

<figure><img src="/files/WvJHub9q4AIJoqxOmjfK" alt="" width="360"><figcaption></figcaption></figure>

#### Specifications

| Parameter                 | Value and Units  |
| ------------------------- | ---------------- |
| Outside Diameter          | 34.9mm (1.375in) |
| Max Locked Width w/Screws | 15.3mm (0.6in)   |
| Bore                      | 1/2in Hex        |
| Single Plate Weight       | 5g (0.011lb)     |
| 6 Screw Assembly Weight   | 21g (0.046lb)    |


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