# Flap

ION Flap Wheels are designed for intakes and conveyance that need reliable performance when interacting with irregular or variable gamepieces. Similar to compliant wheels, they provide a flexible interface, but their flap-based design introduces intentional slip between the wheel and the gamepiece. 

This helps smooth out transitions, reduce jams, and improve handling consistency across a wide range of shapes and materials. Each wheel is built from a durable polypropylene core with flexible TPR flaps that can be trimmed to width using the printed cut marks, allowing teams to tailor the wheel to their specific mechanism or gamepiece requirements.

## 1/2in Hex Flap Wheels

<figure><img src="/files/Q5MQq8jNIpPqHEKLWSkx" alt="" width="375"><figcaption></figcaption></figure>

The 1/2in Hex Flap Wheels feature cut marks every 3.2mm on the flaps for consistent cutting, allowing for versatility and adaptability. These flap wheels have a solid 1/2in Hex Hub molded into the wheel.&#x20;

These wheels come in three different durometers, outlined below. As the tread durometer increases the compliant flap gets harder which will change traction, wear, and compliance of the flap.

### Specifications

<table data-header-hidden><thead><tr><th width="150"></th><th width="150"></th><th data-hidden></th><th data-hidden></th></tr></thead><tbody><tr><td><strong>Parameter:</strong></td><td><strong>Value and Units:</strong></td><td></td><td></td></tr><tr><td>Flap Length:</td><td>4in (101.6mm) (end to end)</td><td></td><td><strong>Flap Width:</strong></td></tr><tr><td>Hub Width:</td><td>0.5in (12.7mm)</td><td>.50in</td><td>Soft/Med/Hard</td></tr><tr><td>Flap Width:</td><td>0.44in (11.1mm)</td><td>1.0in</td><td>Soft/Med/Hard</td></tr></tbody></table>

### Durometer Specs

<table data-header-hidden><thead><tr><th width="150"></th><th width="150"></th><th></th><th data-hidden></th></tr></thead><tbody><tr><td><strong>Hardness:</strong></td><td><strong>Color:</strong></td><td><strong>Durometer:</strong></td><td><strong>Hardness</strong></td></tr><tr><td>Soft</td><td>Light Gray</td><td>30A</td><td>Soft/Med/Hard</td></tr><tr><td>Medium</td><td>Dark Gray</td><td>40A</td><td>Soft/Med/Hard</td></tr><tr><td>Hard</td><td>Black</td><td>60A</td><td></td></tr></tbody></table>

### Application Examples

<figure><img src="/files/QSr65s3E708MaDJCjh7u" alt=""><figcaption><p>2024 REV ION FRC Starter Bot Intake Design</p></figcaption></figure>

[2024 REV ION FRC Starter Bot Intake](https://cad.onshape.com/documents/13d6b4106d6774d042b595f2/w/19474c47606fa4f8682cf6dd/e/bc1f2c6a7090fe8998088103)&#x20;

On the 2024 REV ION FRC Starter Bot, the flap wheels on the intake aid in grabbing the CRESCENDO game pieces to be secured for the launcher. &#x20;

<figure><img src="/files/A8DSMTZ4QqReM83j6BRS" alt=""><figcaption><p>2024 REV ION Starter Bot using the flap wheels on the lowered intake</p></figcaption></figure>

The flap wheels spin while the intake is lowered to sweep game pieces into the compliant wheel rollers providing a further reach.&#x20;

## MAXSpline Flap Wheels

<figure><img src="/files/nc7pPIGwQwaicdv2nbmP" alt="" width="563"><figcaption></figcaption></figure>

The MAXSpline Flap Wheels feature a MAXSpline bore and 6 flaps for higher load applications. The increased contact area and six independent flaps allow for more aggressive engagement.&#x20;

### Specifications

<table data-header-hidden><thead><tr><th width="150"></th><th width="150"></th><th data-hidden></th><th data-hidden></th></tr></thead><tbody><tr><td><strong>Parameter:</strong></td><td><strong>Value and Units:</strong></td><td></td><td></td></tr><tr><td>Flap Length:</td><td>6.25in (158.75 mm) (end to end)</td><td></td><td><strong>Flap Width:</strong></td></tr><tr><td>Flap Width:</td><td>0.94in (23.8mm)</td><td>1.0in</td><td>Soft/Med/Hard</td></tr><tr><td>Bore:</td><td>MAXSpline</td><td>.50in</td><td>Soft/Med/Hard</td></tr></tbody></table>

### Durometer Specs

<table data-header-hidden><thead><tr><th width="150"></th><th width="150"></th><th></th><th data-hidden></th></tr></thead><tbody><tr><td><strong>Hardness:</strong></td><td><strong>Color:</strong></td><td><strong>Durometer:</strong></td><td><strong>Hardness</strong></td></tr><tr><td>Soft</td><td>Light Gray</td><td>35A</td><td>Soft/Med/Hard</td></tr><tr><td>Medium</td><td>Dark Gray</td><td>50A</td><td>Soft/Med/Hard</td></tr><tr><td>Hard</td><td>Black</td><td>75A</td><td></td></tr></tbody></table>


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