---
layout: default
title: Stage 3
nav_order: 3
parent: Stages
permalink: docs/stages/stage-3
---

{% capture preface %}
> The purpose of this stage is to add a linear rail on the X axis. We'll basically be trading the weight from the original steel printhead carriage and its wheels for an MGN9 rail of similar weight. Thus, the benefits of this stage aren't as much weight removal as the ability to use a modern printhead such as the Ratrig EVA or the Vz Printhead, plus complete liberation from those frustrating v-slot wheels.
{: .fs-5 .fw-300 .text-grey-dk-100 .text-justify }
{% endcapture %}
{% include docs-preface.html
  title="# Stage 3: Linear X Rail"
  image="/assets/images/docs/stages/stage-3/stage-3-render-lg.png"
  alt="Endorphin stage 3"
  content=preface
%}

---

## Bill Of Materials

#### Linear Rails

| Size         | Length | Quantity | Link                                                   |
| :----------- | :----- | :------- | :----------------------------------------------------- |
| MGN9H Rail   | 400mm  | 1        | [Amazon](https://www.amazon.com/gp/product/B09XQ7YWPT) |

#### Bolts

| Part             | Type              | Quantity | Link                                                   |
| :--------------- | :---------------- | :------- | :----------------------------------------------------- |
| M3x8 socket head | ISO 4762, DIN 912 | 8        | [Amazon](https://www.amazon.com/gp/product/B08R3GJGWT) |

#### T-Nuts

| Size           | Quantity | Link                                                   |
| :------------- | :------- | :----------------------------------------------------- |
| M3 2020 T-nuts | 8        | [Amazon](https://www.amazon.com/gp/product/B08NZMD2BJ) |

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