PRODUCT DETAILS
The MGN12 Linear Rail Precision Motion Kit is a complete Y-axis upgrade for the Creality Ender 3 S1 and Ender 3 S1 Pro.
Linear rails (or guides) are the preferred choice for many industrial applications. Manufactured to tight tolerances, they offer superior performance with greater precision and accuracy. The rigid stainless steel rails allow little to no flex, and with proper lubrication, the 3/32" ball bearings are remarkably smooth and quiet.
To introduce rail compatibility on the S1 series, we've developed a complete Y axis upgrade which replaces the original closed face extrusion. At the core of this product is our custom Baux Bar, a 2mm thick aluminum beam which supports multiple linear rail configurations. Factory anodized black, it seamlessly matches the S1's aesthetic and appears as though it were stock part.
MGN12 Linear Rail Precision Motion Kit for S1 / Pro - Assembly Guide
Configurations
The MGN12 Precision Motion Kit offers two possible linear rail configurations.
Single Rail
The standard choice is a single MGN12 linear rail, centered on the Baux Bar for equal weight distribution. This provides excellent stability and maximum performance, where minimal preload allows the bed assembly to move freely. This is our recommendation for most S1 and S1 Pro 3D printers.

Dual Rail
Adding a second MGN12 linear rail is optional (not included). Mounted in parallel, the weight is distributed across a wider distance for even greater stability, ideal for heavier cast aluminum heated beds and / or glass plates. However, dual rails require precise alignment or they can introduce binding and impede the movement.

CONTENTS
Package Contents
The MGN12 Linear Rail Precision Motion Kit comes with the following parts. Certain items can be removed using the provided options.
- (1x) Modular 3-Point Y carriage plate
- (1x) 300mm MGN12 linear rail
- (1x) Baux bar
- (1x) Belt tensioner bracket
- (1x) Stepper motor bracket
- Mounting hardware
COMPATIBILITY
Compatibility
The MGN12 Linear Rail Precision Motion Kit is compatible with the following 3D printers.
- Creality Ender 3 S1
- Creality Ender 3 S1 Pro
MANUAL
REVIEWS
SHIPPING
Shipping
Gulfcoast Robotics ships Monday through Friday, excluding holidays. The shipping cut-off time is 11 A.M. Eastern Standard. Orders placed after the cut-off time will be shipped the following business day. All orders are fulfilled by our warehouse located in North Port, Florida (US).
Domestic Orders
Domestic orders are shipped via USPS using the service selected at checkout. Parcels that exceed the First Class weight limit of 15.9 oz will automatically use Priority Mail. Once your package has been processed, a Tracking Number will be provided. The Shipping Confirmation is sent via e-mail and/or SMS alerts, depending on the contact information specified at checkout.
International Orders
All orders shipped to a destination outside of the United States are subject to the import duties, fees and taxes of the destination country. Delays in delivery may occur if your package is randomly selected by the Customs Department for inspection.We have no control over the process or additional charges associated with the delivery and important of your package into your country. We do not benefit in anyway from these charges and work closely with our carriers to ensure as few delays as possible.We are not responsible for any duties, fees, or taxes that are incurred during the delivery of your order/package.