Phaetus Conch Hot End for Qidi Plus 4 (Various Nozzle Diameters) - Fully Complete with Heater and Thermistor Installed

Phaetus Conch Hotend for QIDI Plus4 — EndCoat Full-Metal Heatbreak, 30mm³/s, 370°C

The QIDI Plus4 is a capable machine with one well-documented weak point: the stock heatbreak spacer breaks under sustained high-temperature use, often requiring a full hotend replacement. The Phaetus Conch fixes that with a patent-pending EndCoat™ coated full-metal heatbreak that eliminates the spacer failure point entirely — while also pushing flow rates to 30mm³/s and handling temperatures up to 370°C. This listing includes the complete hotend with heater and thermistor pre-installed.

EndCoat™ Full-Metal Heatbreak — Solves the Plus4's Weak Point

The stock QIDI Plus4 heatbreak uses a spacer design that fractures under repeated thermal cycling and high-temperature loads — particularly when printing abrasive engineering filaments at sustained high speeds. The Phaetus Conch replaces the entire assembly with a patent-pending full-metal heatbreak coated with EndCoat™, Phaetus' precision-applied surface treatment that increases hardness and abrasion resistance on the heatbreak throat and nozzle tip. The patented rigid kinematic coupling system adds structural protection against heatbreak deformation — the failure mode the stock design is susceptible to.

30mm³/s Flow Rate — 370°C Max Temperature

The Conch's redesigned cooling fins use an inclined dendritic geometry that increases cooling surface area and accelerates heat dissipation compared to standard fin designs. The nickel-plated copper alloy heater block provides fast, uniform heat transfer. Flow channel roughness is maintained below Ra 0.2μm for smooth, consistent filament flow through the melt zone. The result is 30mm³/s volumetric flow capacity at temperatures up to 370°C — the full range of what the Plus4's hotend system is capable of handling.

EndCoat™ Nozzles — 2.5× Longer Service Life

The replaceable EndCoat™ nozzles last up to 2.5 times longer than hardened steel nozzles under abrasive filament conditions — carbon fiber, glass fiber, glow-in-the-dark, and other wear-intensive materials. The 30-second QuickNozzle system allows nozzle swaps without tools and without full disassembly. Available in 0.2mm, 0.4mm, 0.6mm, and 0.8mm.

Specifications

Installation Note — Hot Tightening Required

Always perform hot tightening when installing or replacing nozzles. Nozzles tightened cold may develop gaps when the metal expands at temperature, causing filament leakage around the nozzle seat. Heat to operating temperature, then snug the nozzle with the provided tool. Use heat-resistant gloves and never touch the heater block or nozzle directly during this process.

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