50.204.0063, ELEGOO Neptune 4 MAX Extruder Kit, Complete dual-gear direct-drive replacement printhead assembly

The ELEGOO Assembled Extruder Kit (50.204.0063) is a fully drop-in replacement toolhead engineered specifically for the high-speed, large-format Neptune 4 Plus and Neptune 4 Max FDM 3D printers. Weighing just 290 grams, this compact assembly integrates the entire feed mechanism, thermal hotend, and primary part cooling architecture into a unified system.

By utilizing a short, direct filament path paired with aggressive mechanical gear reduction, it maximizes extrusion force while eliminating the stringing and lag common to Bowden setups. It ships fully assembled and wired, serving as an identical OEM swap to instantly recover from severe filament clogs ("the blob of death"), thermal sensor failures, or gear teeth degradation without requiring custom splicing or firmware alterations.

Key Features

• High-Torque Dual-Gear Direct Drive: Utilizes dual stainless steel drive gears spinning at an optimal 5.2:1 reduction ratio, supplying powerful filament traction that prevents slipping or grinding—especially when feeding soft, flexible TPUs.
• 300°C High-Temperature Hotend: Equipped with an extended melting zone featuring a high-capacity 60W ceramic heating element and a copper heating block, engineered to thoroughly liquify plastics during ultra-high-speed printing.
• Copper-Titanium Bi-Metal Throat Pipe: Built with a specialized bi-metal heat break that isolates heat rapidly to prevent thermal creep, drastically minimizing mid-print structural jams and nozzle clogs.
• Dual 4015 Layer-Cooling Fans: Outfitted with twin, high-volume 4015 ball-bearing cooling blowers that sit on either side of the nozzle to quickly freeze fresh filament layers in place during rapid toolpaths.
• Ribbon-Cable Interface Ready: Outfitted with the exact electrical pin matching and terminal layout needed to receive the standard factory ribbon-cable harness for true plug-and-play installation.
• Fully Pre-Assembled Package: Ships with the extruder motor, hotend assembly, breakout board, structural carriage shroud, and cooling fans pre-bolted together for a fast installation window.