Overview

The MGN12 Linear Rails X-Axis Kit is designed for the original Creality Ender 3 and Ender 3 Pro 3D Printers. It is Intended to replace the stock v-wheel rollers, offering high precision and smooth motion.

  • High Positional Accuracy
  • CNC Machined Aluminum Brackets
  • Steel core GT2 6mm Belt
  • Lightweight Modular Y Carriage

Package Contents

Required Tools

Hex Wrenches

The installation will require the 2.0, 2.5 and 3mm hex wrenches, found in the Ender 3 toolset.

Open Wrench

The installation will require the 8mm open wrench, found in the Ender 3 toolset.

Medium Threadlocker

While optional, we recommend the use of a medium strength thread locking compound, used to secure threads on all metal-to-metal connections.

1. Remove Belt

Tools Required: 3mm Hex Wrench

Loosen the belt tensioner on the right side of the X axis until the belt goes slack. This is fastened by (2) M4 x 8mm screws as pictured.

Once slack, disconnect the belt ends from the X carriage by sliding them out of the rear notches.

2. Remove Fan Shroud

Tools Required: 2mm Hex Wrench

Remove the fan shroud by loosening the (2) M3 x 6mm screws on the top and left side.

3. Remove Hotend

Tools Required: 2mm Hex Wrench

Remove the hotend by loosening the (2) M3 x 16mm screws.

4. Remove Carriage

Tools Required: 3mm Hex Wrench, 8mm Open Wrench

Remove the carriage from the X axis by loosening the (3) M4 x 40mm screws.

Place the 8mm open wrench on the eccentric nut to brace it while removing the lower screw.

5. Mount Linear Rail

Tools Required: 2.5mm Hex Wrench

To prepare the backplate (B) for installation, mount the 300mm MGN12 Linear Rail (C) using the included (6) M3 x 6mm sockethead screws.

Mount the adapter bracket (A) to the MGN12H block using the included (4) M3 x 6mm sockethead screws.

6. Prepare Backplate

Tools Required: 3mm Hex Wrench

Insert the (4) M5 screws from Package B through the lower rear backplate.

Loosely thread the (4) M5 T-nuts from Package B on from the front.

7. Install Backplate

Tools Required: 3mm Hex Wrench

Turn the (4) T-nuts so that they are horizontal, then slot them into the rear v-slot extrusion channel of the X axis.

Tighten the M5 screws from the back using the 3mm hex wrench.

8. Install Carriage

Tools Required: 3mm Hex Wrench

Attach the carriage to the MGN12H adapter block using the included (2) M5 x 8mm screws from Package A.

9. Install Hotend

Tools Required: 2mm Hex Wrench

Mount the hotend on the carriage using the original (2) M3 x 16mm screws from step 3.

10. Install Fan Shroud

Tools Required: 2mm Hex Wrench

Reattach the fan shroud using the original (2x) M3 x 6mm screws from step 2.

11. Install Belt

Reattach the belt ends to the X carriage by sliding them into the rear notches.

Tension the belt as needed before tightening down the M4 screws.

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