Anycubic Hardened Steel Nozzle for Kobra S1 Max

The Anycubic Hardened Steel Nozzle for Kobra S1 Max is an original replacement nozzle designed for the high-temperature quick-release hotend system used by the Anycubic Kobra S1 Max and Kobra S1 Max Combo.

Hardened steel provides substantially better wear resistance than standard brass, making these nozzles particularly suitable for abrasive composite filaments such as carbon-fiber-filled materials. The Kobra S1 Max is supplied with a 0.4mm hardened-steel nozzle as standard and supports additional 0.6mm and 0.8mm hardened-steel options for applications requiring increased material flow.

Combined with the Kobra S1 Max's 350°C hotend system, the hardened-steel nozzle provides a durable extrusion path for both everyday materials and compatible engineering filaments.

Key Features

• Original Anycubic hardened-steel nozzle

• Designed for Kobra S1 Max and Kobra S1 Max Combo

• Available in 0.4mm, 0.6mm, and 0.8mm diameters

• Higher wear resistance than standard brass nozzles

• Suitable for compatible abrasive composite filaments

• Works with the Kobra S1 Max quick-release hotend system

• Suitable for general and engineering-material printing

• Designed for the printer's high-temperature hotend platform

Hardened Steel Construction

Hardened steel is designed to resist wear caused by abrasive filament additives.

Materials containing carbon fiber, glass fiber, or other hard particles can gradually enlarge the opening of a standard brass nozzle, affecting extrusion accuracy and print quality.

A hardened-steel nozzle provides improved durability when printing these materials regularly.

Suitable for Abrasive Filaments

The Kobra S1 Max officially supports a broad range of materials including composite engineering filaments such as:

• PLA-CF

• PETG-CF

• PA6-CF

• PC-CF

• PC-GF

• PET-CF

For abrasive materials, hardened-steel nozzles are preferable to standard brass because they maintain their nozzle diameter for longer under repeated use.

Available Nozzle Sizes

Anycubic currently offers three hardened-steel nozzle diameters for the Kobra S1 Max:

Each diameter provides a different balance between detail, printing speed, flow rate, and resistance to clogging.

0.4mm Hardened Steel Nozzle

The 0.4mm hardened-steel nozzle is the standard nozzle supplied pre-installed on the Kobra S1 Max.

It offers a good balance of:

• Fine detail

• Surface quality

• Printing speed

• Layer-height flexibility

• General-purpose usability

It is suitable for users who want one nozzle for both conventional and selected abrasive materials.

0.6mm Hardened Steel Nozzle

The Kobra S1 Max package also includes a 0.6mm hardened-steel nozzle.

The larger opening allows greater material flow and can reduce printing time on larger models.

It is particularly useful for:

• Carbon-fiber-filled filament

• Large functional parts

• Faster prototyping

• Stronger thick-wall components

• Higher-flow printing

Anycubic specifically recommends 0.6mm hardened steel as the preferred size for many abrasive composite filament applications because the larger opening reduces the likelihood of clogging.

0.8mm Hardened Steel Nozzle

The optional 0.8mm version is intended for applications where maximum detail is less important than high material throughput.

It is suitable for:

• Large-format models

• Thick layers

• Large functional parts

• Rapid prototyping

• High-flow extrusion

• Selected abrasive composite materials

A larger nozzle can substantially reduce print time for large objects when used with suitable layer heights and print profiles.

Designed for the Kobra S1 Max Quick-Release Hotend

The Kobra S1 Max uses a quick-release nozzle system that allows nozzle changes without lengthy hotend disassembly.

This makes it practical to keep different nozzle sizes available for different jobs and switch between them according to the required balance of detail and printing speed.

Always allow the hotend to cool and follow the correct Anycubic replacement procedure before removing the nozzle.

High-Temperature Printing Platform

The Kobra S1 Max hotend supports temperatures up to:

350°C

This allows the printer to process a wider range of engineering materials than conventional lower-temperature desktop printers.

Nozzle temperature should always be selected according to the filament manufacturer's recommendations rather than simply using the printer's maximum temperature.

Wear Resistance for Long-Term Use

Abrasive filament can gradually wear a nozzle opening from its original diameter.

As wear increases, users may experience:

• Over-extrusion

• Reduced dimensional accuracy

• Inconsistent line width

• Poor surface quality

• Difficulty maintaining calibrated flow

Hardened steel significantly slows this wear compared with softer brass nozzles.

Technical Specifications

Recommended Applications

• General FDM printing

• Carbon-fiber filament printing

• Engineering-material printing

• Large-format models

• Functional prototypes

• Mechanical components

• High-flow printing

• Large production parts

• Nozzle replacement

• Print farm maintenance

Compatibility

Compatible with:

• Anycubic Kobra S1 Max

• Anycubic Kobra S1 Max Combo

This nozzle is designed specifically for the Kobra S1 Max hotend system.

Do not assume compatibility with:

• Anycubic Kobra S1

• Kobra S1 Combo

• Kobra X

• Kobra 4

• Kobra 3 Series

• Other Anycubic printers using different hotend systems

Hardened Steel vs Brass

Hardened Steel

• Better wear resistance

• Recommended for abrasive filament

• Longer lifespan with fiber-filled materials

• Available in 0.4 / 0.6 / 0.8mm for Kobra S1 Max

Brass

• Higher thermal conductivity

• Ideal for conventional non-abrasive filament

• Softer and wears faster with abrasive composites

• Anycubic lists a separate 0.25mm brass option for the Kobra S1 Max

For regular PLA and PETG printing, either compatible nozzle type can be suitable. For frequent carbon-fiber or other abrasive filament use, hardened steel is the better choice.

Package Includes

• 1 × Anycubic Hardened Steel Nozzle for Kobra S1 Max

Nozzle diameter depends on the selected product variant.

Installation Note

Before replacing the nozzle:

• Switch off the printer

• Allow the hotend to cool completely

• Remove the existing nozzle according to the Anycubic quick-release procedure

• Confirm the replacement nozzle diameter

• Install the new nozzle fully and securely

• Reassemble the toolhead correctly

• Update the nozzle diameter in the printer and slicer if changing sizes

• Run the appropriate printer calibration

• Check the first layer before beginning a long print

Slicer Configuration

When changing nozzle diameter, update the nozzle configuration in Anycubic Slicer Next or the selected compatible slicer.

Parameters that may need adjustment include:

• Nozzle diameter

• Layer height

• Line width

• Flow rate

• Print speed

• Maximum volumetric flow

• Retraction

• Filament profile

Using slicer settings intended for a different nozzle diameter can result in poor extrusion or print quality.

Usage Note

For abrasive carbon-fiber or glass-fiber-filled filaments, Anycubic recommends hardened-steel nozzles rather than standard brass or stainless-steel alternatives. A 0.6mm hardened-steel nozzle is particularly suitable where reducing clogging risk and maintaining durability are priorities.

Select the nozzle diameter according to the required balance between fine detail, extrusion flow, print speed, and filament type.