Anycubic Dual Sided Textured PEI Steel Build Plate for Kobra S1 Max

The Anycubic Dual Sided Textured PEI Steel Build Plate is a large-format flexible printing surface designed for the Anycubic Kobra S1 Max and Kobra S1 Max Combo.

Featuring textured PEI printing surfaces and a flexible spring-steel core, the plate provides reliable first-layer adhesion while allowing completed models to be removed more easily after cooling. Simply remove the plate from the magnetic heated bed and gently flex it to release the printed part.

With an overall size of approximately 360 × 369mm, the plate is designed around the Kobra S1 Max's large 350 × 350mm XY printing area and is suitable as either a replacement for the original build plate or a spare surface for frequent printing.

Key Features

• Dual-sided textured PEI printing surface

• Flexible spring-steel construction

• Designed for Anycubic Kobra S1 Max

• Approx. 360 × 369mm overall size

• Approx. 0.4mm plate thickness

• Works with the magnetic heated-bed system

• Reliable adhesion for compatible FDM materials

• Flexible design for easier model removal

Dual-Sided Textured PEI Surface

The build plate provides textured PEI printing surfaces designed to combine strong first-layer adhesion with convenient model removal.

The textured finish also creates a fine textured pattern on the bottom surface of printed parts, providing a clean appearance without requiring additional finishing.

Having usable printing surfaces on both sides also provides additional flexibility when maintaining or rotating build plates.

Designed for Large-Format Printing

The Kobra S1 Max provides a large:

350 × 350 × 350mm build volume

The 360 × 369mm physical plate is sized to cover the printer's complete usable XY printing area while fitting correctly onto the magnetic heated bed.

The large platform is particularly useful for:

• Helmets and cosplay parts

• Large functional prototypes

• Decorative models

• Production components

• Household organizers

• Signs and lettering

• Large enclosures

• Multi-part assemblies

Reliable First-Layer Adhesion

Textured PEI provides good adhesion for a wide range of common FDM materials when the surface is clean and the correct bed temperature is used.

A properly prepared build plate helps reduce issues such as:

• Warping

• Corner lifting

• First-layer separation

• Model movement

• Uneven bottom surfaces

Correct leveling, Z-offset, filament profile, and surface cleanliness are still important for consistent results.

Flexible Spring-Steel Core

The plate uses a flexible spring-steel base rather than a rigid glass platform.

After printing:

1. Allow the model and plate to cool.

2. Remove the spring-steel plate from the magnetic bed.

3. Gently flex the plate.

4. Allow the finished model to release.

This reduces the need to force a scraper underneath large prints and helps simplify part removal.

Magnetic Installation

The Kobra S1 Max uses a magnetic spring-steel build-plate system.

The 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 ensure that both the underside of the plate and the magnetic surface are clean before installation.

Even small pieces of filament or debris underneath the plate can affect flatness and first-layer consistency.

Heated Bed up to 120°C

The Kobra S1 Max heated bed supports temperatures up to:

120°C

This gives the printer flexibility for both everyday materials and engineering filaments that require higher build-plate temperatures.

Anycubic's current filament guidance lists textured PEI bed-temperature ranges such as:

Actual settings should be selected according to the filament manufacturer and print profile.

Suitable for Engineering Materials

The Kobra S1 Max is designed to print a wide range of materials, including:

• PLA

• PETG

• TPU

• PET

• PLA-CF

• PETG-CF

• PVA

• ABS

• ASA

• PC

• PA

• PA6-CF

• PC-CF

• PC-GF

• PET-CF

The textured PEI build plate provides a versatile surface for many of these materials when used with appropriate bed temperatures and release practices.

Works with the Enclosed Kobra S1 Max

The Kobra S1 Max is a fully enclosed CoreXY printer with active chamber heating.

Combined with the high-temperature heated bed, the PEI spring-steel plate can support printing workflows involving materials that benefit from a warmer and more stable environment.

Bed adhesion and release behavior vary between filament types, so use the correct material profile and adhesive or separation layer where recommended.

Easy Model Removal

Many printed parts release naturally as the PEI surface cools.

For larger parts:

• Allow the plate to cool first

• Remove it from the magnetic bed

• Flex it gently in multiple directions

• Avoid excessive bending

• Avoid using sharp tools against the PEI coating

Large prints can store significant mechanical stress, so controlled removal is preferable to forcing the part from the plate.

Useful as a Spare Build Plate

A second build plate can improve workflow for users operating the Kobra S1 Max regularly.

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

This is particularly useful for:

• Print farms

• Production environments

• Workshops

• Schools

• Rapid prototyping

• Small-batch manufacturing

Technical Specifications

Applications

• Large-format FDM printing

• PLA printing

• PETG printing

• ABS printing

• ASA printing

• TPU printing

• Engineering filament printing

• Composite filament printing

• Replacement of worn PEI plate

• Replacement of damaged spring-steel plate

• Spare printing surface

• Print farm operation

• Workshop and production use

Compatibility

Compatible with:

• Anycubic Kobra S1 Max

• Anycubic Kobra S1 Max Combo

The standalone and Combo versions use the same printer platform and build-plate format.

Do not assume compatibility with:

• Anycubic Kobra S1

• Kobra S1 Combo

• Kobra X

• Kobra 3

• Kobra 3 Max

These printers use different build-plate dimensions.

Cleaning and Maintenance

Keeping the textured PEI surface clean is important for maintaining 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 area with oily fingers

• Clean the surface when adhesion begins to decrease

• Avoid sharp metal scrapers

• Avoid damaging the textured coating

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

Installation Note

Before installing the plate:

• Clean the magnetic heated bed

• Remove any filament fragments or debris

• Align the plate correctly

• Make sure the entire surface sits flat

• Check that no edge or corner is raised

• Run leveling when required

• Verify the first layer before starting a large print

Changing or replacing a build plate can slightly affect the nozzle-to-bed relationship, so checking calibration after installation is recommended.

Package Includes

• 1 × Anycubic Dual Sided Textured PEI Spring Steel Build Plate for Kobra S1 Max

Usage Note

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

Some materials, particularly PETG and selected engineering filaments, can bond strongly to PEI. Use the appropriate adhesive or separation layer where recommended rather than forcing the model from the surface. This helps protect the textured PEI coating and extend the service life of the build plate.