Anycubic Kobra 2 neo linear rod mod - Y axis

Kobra 2 Neo mods!

Materials Required

• LM12UU linear bearings — 4 pcs
• 12 mm × 350 mm linear rods — 2 pcs
• M3 screws — 8 pcs (you could use m4 or m5 screws too, just make sure you have a t nuts for that size)
• M3 T‑nuts (for 2020 aluminum extrusion)
• Filament (ABS or PETG strongly recommended)
• Tape (optional, for rod shimming)
• Superglue (for limit switch mount)

Use heat‑resistant materials such as ABS or PETG. PLA is not recommended due to heat deformation.

🔧 Assembly Instructions

0. Preparation

• Ensure all printed parts are complete and dimensionally accurate.
• Power off and unplug the printer before starting.

1. Remove the Heated Bed

• Unscrew and lift off the heated bed to expose the Y‑axis carriage.

2. Remove the V‑Wheels

• Unscrew the V‑wheels from the Y‑axis bed frame.
• Keep the screws and nuts — they will be reused.

3. Install the Linear Bearings

• Slide one LM12UU bearing into each printed bearing adapter.
• Ensure they are fully seated and aligned.

4. Mount the Bearing Adapters

• Using the original V‑wheel screws and nuts, attach the bearing adapters to the bed frame.
• Refer to the images for correct orientation.

5. Remove the Y‑Axis Extrusion Screws

• Flip the printer over.
• Remove the four screws in the center that secure the Y‑axis aluminum extrusion to the frame.

6. Prepare the Rod Mounts

• Pre‑install M3 screws(or m4 or m5 size) and T‑nuts sideways into the:
  • Linear Rod Back Mount
  • Linear Rod Front Mount
• Ensure the T‑nuts can rotate and lock into the extrusion when tightened.

7. Install the Back Rod Mount

• Slide the Linear Rod Back Mount into the extrusion first.
• Push it fully to the rear.
• Tighten all M3 screws to lock the T‑nuts in place.(or m4 or m5 would work too as long as you have the t nuts)

8. Install the Front Rod Mount and Belt Tensioner

• Slide the Linear Rod Front Mount into the extrusion but do not tighten yet.
• Install Belt Tensioner 1 onto the front mount.
• Slide the front mount forward to the correct position, then tighten the screws to secure it.

9. Install the Limit Switch Mount

• Superglue the Limit Switch Mount onto the Linear Rod Back Mount as shown in the images.
• Once cured, screw the limit switch into place.
• If the linear rods feel loose, wrap a thin layer of tape around the ends to improve fit.