> For the complete documentation index, see [llms.txt](https://docs.revrobotics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.revrobotics.com/ion-build/structure/extrusion.md).

# Extrusion

## MAXTube Extrusion

[MAXTube](https://www.revrobotics.com/MAXTube/) is compatible with the REV ION System and is a strong extruded aluminum tubing (Aluminum 6061) that features positional hole patterns that make robot structures easier to build. 

MAXTube comes in [multiple extrusion profiles and wall thicknesses](#maxtube-available-sizes).

#### MAXTube with Nut Groove:

On the 1in sides of these MAXTube extrusions, there is a nut groove inside to fit #10 nuts, making assembly easier by helping to retain nuts where a wrench can't reach. 

![](/files/a1AqkvBWuJw4WiZTGrHi)

{% hint style="success" %}
Use Standard 2x1 Tube for a more secure bearing fit and 2x1 Light Tube where weight is a critical factor
{% endhint %}

## MAXTube Hole Patterns

### MAX Pattern 

Some MAXTube features the MAX Pattern, combination of #10 holes in a 1/2in pitch grid and the MAXSpline bore every 2in. This repeats down the length of channel to mount bearings, MAX Hubs, shafts, brackets, and more.

<figure><img src="/files/9CRMfvgct8Kr1uRg4oZb" alt=""><figcaption></figcaption></figure>

### Grid Pattern

2x1in MAXTube that features Grid Pattern has three rows of #10 holes on a 1/2in pitch. The Grid Pattern is ideal for rapidly prototyping structures with our 1in brackets.&#x20;

<figure><img src="/files/d7w4HHAC2OqjSDk31bnJ" alt=""><figcaption></figcaption></figure>

### MAXTube Available Sizes

|                     |                      |                              |                |
| ------------------- | -------------------- | ---------------------------- | -------------- |
| **Size**            | **Pattern**          | **Position/Length**          | **Nut Groove** |
| 1/2x1/2in           | Grid                 | 47in                         | No             |
| 1x1in               | Grid                 | 47in                         | Yes            |
| 1x1in - 1/16in Wall | Grid                 | 47in                         | No             |
| 1x1in - 1/8in Wall  | Grid                 | 47in                         | No             |
| 2x1in Light         | No Pattern           | 47in                         | Yes            |
| 2x1in Light         | Grid                 | 47in                         | Yes            |
| 2x1in               | No Pattern           | 47in                         | Yes            |
| 2x1in               | Grid                 | 47in                         | Yes            |
| 2x1in               | MAX Pattern          | 1-Pos (3in) to 23-Pos (47in) | Yes            |
| 2x1in - 1/16in Wall | Grid                 | 47in                         | No             |
| 2x1in - 1/8in Wall  | Grid                 | 47in                         | No             |
| 2x1in - 3/16in Wall | Grid                 | 47in                         | No             |
| 2x1in - 1/8in Wall  | MAX Pattern          | 1-Pos (3in) to 23-Pos (47in) | No             |
| 2x2in               | Grid                 | 47in                         | No             |
| 2x2in               | MAX Pattern          | 47in                         | No             |
| 2x2in               | MAX and Grid Pattern | 47in                         | No             |

<figure><img src="/files/Il1BrUEyXCQFE58eIZri" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/CA0muHkipFCVckyvf1mN" alt=""><figcaption></figcaption></figure>

## 1in Extrusion&#x20;

<figure><img src="/files/8DuGERyohHi1QKfm1gWX" alt=""><figcaption></figcaption></figure>

The [1in Extrusion (REV-21-1000)](https://www.revrobotics.com/1in-extrusion/) has slots on on all four sides that accept standard #10 Hardware, including low-profile nylock nuts. Rather than using a T-nut, which is more expensive,  slide a #10 hex head screw along the slot and adjust brackets and other build materials as needed. All holes in the 1in Extrusion can be tapped with a 10-32 tap, consistent with the REV ION Standards. The corners can also accept 1/16in thick flat stock.&#x20;

The flexibility of T-Slot Extrusion makes using it a great option for builds that won’t fit on the pattern of your patterned extrusion. Teams are not locked into a pitch, so there are virtually infinite options for mounting other components. T-Slot Extrusion is also a great option for adding linear motion to your robot.