> 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/rev-crossover-products/ultraplanetary/cartridge-details.md).

# Cartridge Details

## Cartridge Details 

### Actual Cartridge Gear Ratios

| Part Number | Product Name                 | Nominal Gear Ratio | Actual Gear Ratio |
| ----------- | ---------------------------- | ------------------ | ----------------- |
| REV-41-1601 | UltraPlanetary Cartridge 3:1 | 3:1                | 84:29 (2.89:1)    |
| REV-41-1602 | UltraPlanetary Cartridge 4:1 | 4:1                | 76:21 (3.61:1)    |
| REV-41-1603 | UltraPlanetary Cartridge 5:1 | 5:1                | 68:13 (5.23:1)    |

### Final Gear Reduction For Two Stage Gearboxes

Nominal gear ratios are used to reference the product name for ease of use for the following chart. For actual gear ratios please reference the [Actual Cartridge Gear Ratios Table](broken://spaces/-MCytznr1U-CkUXyncFz/pages/-ME3ywJLrX2Cn6GnRYBK#actual-cartridge-gear-ratios).

<figure><img src="/files/6fuvLheiCcvFtkOqRFA6" alt=""><figcaption></figcaption></figure>

{% hint style="warning" %}
When building your gearbox make sure the highest gear reduction is closest to the motor. Asterisked cells are omitted as they have a lower gear reduction closer to the motor.
{% endhint %}

### Final Gear Reduction For Three Stage Gearboxes

Nominal gear ratios are used to reference the product name for ease of use for the following chart. For actual gear ratios please reference the [Actual Cartridge Gear Ratios Table](broken://spaces/-MCytznr1U-CkUXyncFz/pages/-ME3ywJLrX2Cn6GnRYBK#actual-cartridge-gear-ratios).

<figure><img src="/files/GT1WPxFqYFEPOfSbH1vy" alt=""><figcaption></figcaption></figure>