MGN12 Linear Rail Precision Motion Kit for Ender 3 S1 / Pro (Y-Axis)

Regular price $119.99 | Save $-119.99 (Liquid error (sections/product-template line 234): divided by 0% off)

  • Upgrades the Ender 3 S1 / Pro Y axis linear motion system for superior performance
  • Eliminates backlash and wheel binding to improve the overall print quality
  • Supports both single and dual rail configurations for maximum bed stability
  • Steel MGN12 rails and ball bearings reduce maintenance due to low wear and tear

Estimated Delivery Time is between and .


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



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.


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



The MGN12 Linear Rail Precision Motion Kit is compatible with the following 3D printers.

  • Creality Ender 3 S1
  • Creality Ender 3 S1 Pro



Customer Reviews

Based on 10 reviews

Great service. All the ordered items came quickly and securely packaged. The different items were well labelled, and there was no confusion about which linear rail was for which mod. Outstanding purchase and upgrade experience. I thoroughly recommend Gulfcoast Robotics if you need to upgrade a printer they specialise in.

Amazing upgrade

This double Axis Y kit for my Ender 3 S1 Pro has been an outstanding upgrade for me, significantly transforming my 3D printing quality. I found it easy to install, thanks to the high-quality materials included in the kit. This upgrade has enhanced the precision and smoothness of my Y-axis, leading to more consistent and detailed prints. I've noticed a remarkable reduction in vibrations and noise, which has increased the reliability of my printer for long projects. In summary, I highly recommend this investment to any Ender 3 S1 / Pro user looking to optimize their printing experience. Thanks guys.

Anthony Eden
Linear Rail FULL HOUSE upgrade for Ender 3 S1 Pro

Linear Rail FULL HOUSE upgrade for Ender 3 S1 Pro
I have just fitted the X, Y and Z linear rail upgrade kits from Gulfcoast Robotics to my Ender 3 S1 Pro.
It now looks and performs like a machine designed by an ENGINEER, not like a machine designed by an ACCOUNTANT.
Many thanks to Brett for the support provided half a world away from me, here in Sydney Australia.
I am very tempted to repeat the exercise on my Ender 3 V2.

Christopher Dangerfield
Amazing upgrade

This is an amazing upgrade for my Ender 3 S1 Pro. I had major issues with the bed wobbling, so could never properly level for more than one print run. With these dual linear rails that wobble is completely gone. Rock solid movement and level! Highly, highly suggest this upgrade.

Another Great Kit

After installing the X axis kit and being extremely happy, I purchased the Y axis. The instructions were easy to follow and i no longer have a wabbly bed or have to wonder if the wheel is tight enough. This kit also made it quieter which is always a plus. Now having the X and the Y axis, I can see an improvement in my prints. Recommend this kit to anyone that is on the fence about getting it.



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.

MGN12 Linear Rail Precision Motion Kit for Ender 3 S1 / Pro (Y-Axis)

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