Anycubic Dual Sided Textured PEI Steel Build Plate for Kobra 3 Max

The Anycubic Dual Sided Textured PEI Steel Build Plate is a large-format flexible printing surface designed for the Anycubic Kobra 3 Max and Kobra 3 Max Combo.

With textured PEI coating on both sides and a flexible spring-steel core, the plate provides reliable first-layer adhesion while allowing finished models to be removed more easily after cooling. Its approximately 430 × 429mm overall size is designed around the Kobra 3 Max's large 420 × 420mm printing area.

Both sides can be used for printing, extending the usable life of the plate and making it a practical replacement or spare surface for users regularly producing large-format models.

Key Features

• Dual-sided textured PEI printing surface

• Flexible spring-steel construction

• Designed for Anycubic Kobra 3 Max

• Approx. 430 × 429mm overall plate size

• 0.6mm spring-steel plate thickness

• Works with the Kobra 3 Max magnetic heated bed

• Flexible design for easier model removal

• Suitable as a replacement or spare build plate

Dual-Sided Textured PEI

Both sides of the build plate feature a micro-textured PEI surface.

This allows either face to be used for printing and provides a second usable surface when one side becomes worn or damaged.

The textured coating also transfers a fine textured finish to the bottom surface of printed models.

Designed for Large-Format Printing

The Kobra 3 Max provides a large:

420 × 420 × 500mm build volume

and requires a correspondingly large build plate.

The approximately 430 × 429mm spring-steel plate provides the physical surface required to cover the printer's 420 × 420mm usable XY printing area.

This makes it suitable for large projects such as:

• Functional prototypes

• Large decorative models

• Cosplay components

• Furniture prototypes

• Signs and lettering

• Large organizers

• Production parts

• Multi-part assemblies

Reliable First-Layer Adhesion

Textured PEI provides good adhesion for many commonly used FDM materials when the build surface is clean and the correct bed temperature is selected.

A properly prepared PEI surface helps reduce common first-layer problems including:

• Warping

• Corner lifting

• First-layer separation

• Model movement during printing

• Uneven bottom surfaces

Correct bed leveling, Z-offset, filament temperature, and surface cleanliness remain important.

Flexible Spring-Steel Core

The build plate uses a flexible spring-steel core rather than a rigid glass surface.

After the print has cooled, the plate can be removed from the magnetic bed and gently flexed.

This helps release large printed models without requiring excessive scraping or force.

The spring steel then returns to its normal flat shape for the next print.

Magnetic Installation

The Kobra 3 Max uses a magnetic PEI spring-steel build plate system.

The replacement plate attaches directly to the printer's magnetic heated bed, allowing it to be:

• Installed without tools

• Removed quickly

• Repositioned easily

• Swapped with another compatible plate

Always make sure the underside of the plate and the magnetic surface are clean before installation.

Rear Alignment Features

The Kobra 3 Max build plate includes rear alignment features designed to match the locating arrangement on the heated bed.

Correct positioning helps the plate sit consistently in the intended location when it is removed and reinstalled.

Always verify that the plate is fully seated and not resting on debris before starting a print.

Heated Bed up to 90°C

The Anycubic Kobra 3 Max heated bed supports temperatures up to:

90°C

The PEI spring-steel plate is designed to operate with this heated magnetic platform.

Select bed temperature according to the filament being used rather than automatically operating at the maximum temperature.

Suitable for Common FDM Materials

The textured PEI surface can be used with a range of compatible materials including:

• PLA

• PLA+

• PETG

• TPU

• ABS

• ASA

• Silk PLA

• Wood-filled PLA

• Other compatible FDM filaments

Adhesion behavior varies between materials.

Some filaments can bond strongly to PEI, so an appropriate release layer may be useful depending on the filament and printing conditions.

Easier Model Removal

After printing:

1. Allow the build plate and model to cool.

2. Remove the plate from the magnetic bed.

3. Gently flex the spring steel.

4. Allow the model to release from the textured PEI surface.

Large prints often release significantly more easily after the plate has cooled.

Avoid aggressively bending the plate or forcing parts off with sharp tools.

Useful as a Spare Build Plate

A second plate can improve workflow for users who print frequently.

One plate can remain with a completed model while it cools, while another plate is installed for the next print.

This is useful for:

• Print farms

• Small-batch manufacturing

• Workshops

• Schools

• Prototyping

• Continuous large-format printing

Technical Specifications

Applications

• Large-format FDM printing

• PLA printing

• PETG printing

• TPU printing

• ABS and ASA printing where suitable

• Replacement of worn PEI build plate

• Replacement of damaged spring-steel plate

• Spare printing surface

• High-volume printing

• Print farm operation

• Workshop and production use

Compatibility

Compatible with:

• Anycubic Kobra 3 Max

• Anycubic Kobra 3 Max Combo

The plate should not automatically be assumed compatible with other Anycubic printers simply because they have similar build volumes.

Correct plate dimensions and rear alignment geometry should always be confirmed.

Cleaning and Maintenance

Keeping the PEI surface clean is important for reliable adhesion.

For routine maintenance:

• Allow the plate to cool before cleaning

• Remove filament residue after printing

• Handle the plate mainly by the edges

• Avoid touching the printing surface with oily fingers

• Clean the surface when adhesion begins to decrease

• Avoid sharp metal scrapers

• Avoid highly aggressive solvents

Surface contamination is one of the most common causes of reduced PEI adhesion.

Installation Note

Before installing the build plate:

• Clean the magnetic bed

• Remove any filament fragments or debris

• Align the plate with the rear locating points

• Make sure the complete plate sits flat

• Check that no corner is lifted

• Run bed leveling if required

• Verify the first layer before starting a long print

Replacing a build plate can slightly change the nozzle-to-bed relationship, so checking the first layer after installation is recommended.

Package Includes

• 1 × Dual Sided Textured PEI Spring Steel Build Plate for Anycubic Kobra 3 Max

Usage Note

Allow the plate to cool before removing large printed models whenever possible.

For materials that bond very strongly to PEI, use appropriate filament-specific release practices rather than forcing the model from the surface. This helps extend the life of the textured coating and reduces the risk of damaging the spring-steel plate.