For Prusa MK4 24V 40W Thermometer Line Wire Heating Block Kit Thermistor Cartridge Heater Tungsten Carbide Nozzle for Prusa MK4 3D Printer Extruder

Note: This product is only suitable for MK4 kit.  It does not fit MK4 XL kit

Applicable to: Prusa MK4 kit（not use for MK4 XL kit）

Parameter: 24V 40W Heat Carrier

Packaging list: depending on your choice

1. Name: MK4 tungsten carbide nozzle

2. Scope of application: Suitable for PRUSA MK4 model extrusion head, upgrade and replace the original nozzle

3. Processing technology and color: CNC precision turning, electroplating tungsten carbide.

4. nozzle
features:

1) The nozzle is made of hardened steel with an overall hardness of 50 degrees (surface hardness 55-60 degrees) and is processed by high-quality thermoforming. It is treated with high-temperature carburizing and hardening, and has super wear resistance, heat resistance, high hardness and high toughness. Two characteristics, long service life, and compatible with most high-temperature printing materials on the market.

2) Use tungsten carbide surface coating, which is composed of tungsten carbide and hardened steel. It has super hardness and excellent conductivity, and the maximum printing temperature can reach 550°C.

3) High thermal performance, keeping the nozzle tip temperature uniform during the printing process, thereby ensuring stable extrusion.

4) Since nozzles typically have very high thermal properties, printing speeds can be further increased without sacrificing quality.

5) The entire nozzle is coated with DLC coating. The surface friction coefficient is as low as 0.05, allowing the nozzle to print cleanly without sticking to plastic.

6) From traditional PLA printing to PEEK and even carbon fiber reinforced materials, tungsten carbide nozzles can easily handle long printing periods on any material.

5. nozzle
features

Nozzle diameter: 0.4 mm

Filament diameter: 1.75 mm

Thread: M6

Color: black

Material: The nozzle is made of hardened steel. Tungsten carbide coating, titanium alloy throat, brass sleeve

Minimum orifice diameter: φ0.25

Tolerance: ±0.01mm

Inner hole roughness: ≤Ra0.4μm

Concentricity: ≤0.02mm

Hardness (Mohs): 9

Maximum printing temperature: 550°C

Thermal conductivity: 130W/mk

Expansion coefficient: 4.5μm/m°C

6.DLC coating

The friction coefficient is only 0.05, effectively preventing molten plastic from sticking to the nozzle;

Coating thickness 0.01mm, no impact on dimensional accuracy;

 Maintains good lubrication and wear resistance at temperatures up to 300°C;

Strong adsorption capacity, coating hardness HV2200;

Chemically stable, non-toxic, non-corrosive, insoluble in other solvents.