{"product_id":"qidi-max-4-3d-printer-bimetal-hot-end-qidi-tech-qidi-3d-printer","title":"QIDI Max 4 3D Printer Bimetal Hot End | Qidi Tech Qidi 3D Printer","description":"\u003cdiv class=\"t4s-row\"\u003e\n\n\u003cdiv class=\"t4s-col-12 t4s-col-md-12 t4s-col-item\"\u003e\n\u003cstyle\u003e\nh1{color:#1a1a1a;padding-bottom:10px}\nh2{color:#c0392b;margin-top:35px;border-left:5px solid #c0392b;padding-left:12px}\nh3{color:#2c3e50;margin-top:20px}\ntable{border-collapse:collapse;width:100%;margin:15px 0}\nth,td{border:1px solid #ddd;padding:10px 12px;text-align:left}\nth{background:#f5f5f5;font-weight:bold}\ntr:nth-child(even){background:#fafafa}\n.pros{background:#e8f5e9;border-left:4px solid #2e7d32;padding:15px 20px;margin:10px 0}\n.cons{background:#ffebee;border-left:4px solid #c62828;padding:15px 20px;margin:10px 0}\n.pros li,.cons li{margin:5px 0}\n.faq-item{border:1px solid #e0e0e0;border-radius:6px;margin:10px 0;padding:15px}\n.faq-q{font-weight:bold;color:#1a1a1a;margin-bottom:8px}\n.faq-a{color:#444}\n.cta{background:#c0392b;color:#fff;padding:15px 30px;text-align:center;border-radius:6px;margin:25px 0;font-weight:bold}\n.cta a{color:#fff;text-decoration:none}\nimg{max-width:100%;height:auto;border-radius:6px}\n.blog-links{background:#f0f4f8;padding:20px;border-radius:6px;margin-top:30px}\n.blog-links h3{color:#c0392b;margin-top:0}\n.blog-links ul{list-style:none;padding:0}\n.blog-links li{margin:8px 0}\n.blog-links a{color:#2980b9;text-decoration:none}\n.blog-links a:hover{text-decoration:underline}\n.spec-note{background:#fff3e0;padding:10px 15px;border-radius:4px;margin:10px 0;border-left:4px solid #ff9800}\n\u003c\/style\u003e\n\n\u003ch1\u003eQIDI Max 4 Bimetal Hot End — 350°C Copper-Titanium Replacement Assembly\u003c\/h1\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe QIDI Max 4 Bimetal Hot End is a factory-matched complete hot end assembly featuring a copper-titanium bimetal heat break that reaches 350°C, supports engineering filaments like PA-CF and PC, and resists heat creep better than standard all-metal hot ends — priced at $79.99 for QIDI Max 4 owners.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe bimetal design combines a low-thermal-conductivity titanium alloy cold side (~20 W\/m·K) with a high-thermal-conductivity copper hot side (~400 W\/m·K), creating a sharp thermal gradient that keeps the cold zone cold and the melt zone hot. This means faster heat-up, more stable temperature at high flow rates, and significantly reduced heat creep compared to a single-material stainless steel heat break.\u003c\/p\u003e\n\n\u003cp\u003eThis is a complete drop-in replacement: aluminum heat sink, bimetal heat break, copper heater block, hardened steel 0.4mm nozzle, NTC 100K thermistor, 50W heater cartridge, and pre-wired harness with connectors. No soldering or crimping required.\u003c\/p\u003e\n\n\u003cdiv class=\"cta\"\u003e\u003ca href=\"https:\/\/www.qiditech3dprinter.com\/products\/qidi-max-4-3d-printer-bimetal-hot-end-qidi-tech-qidi-3d-printer\"\u003eBuy Now — $79.99 | Free US Shipping 15-25 Business Days\u003c\/a\u003e\u003c\/div\u003e\n\n\u003ch2\u003eFull Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eQIDI Max 4 Bimetal Hot End\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$79.99 USD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eQIDI Max 4 only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Break Type\u003c\/td\u003e\n\u003ctd\u003eBimetal (Titanium alloy cold side + Copper hot side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold Side Thermal Conductivity\u003c\/td\u003e\n\u003ctd\u003e~20 W\/m·K (Titanium alloy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHot Side Thermal Conductivity\u003c\/td\u003e\n\u003ctd\u003e~400 W\/m·K (Copper)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Nozzle Temperature\u003c\/td\u003e\n\u003ctd\u003e350°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Nozzle\u003c\/td\u003e\n\u003ctd\u003e0.4mm Hardened Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Nozzle Sizes\u003c\/td\u003e\n\u003ctd\u003e0.2mm \/ 0.6mm \/ 0.8mm (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater Cartridge\u003c\/td\u003e\n\u003ctd\u003e50W, 24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermistor\u003c\/td\u003e\n\u003ctd\u003eNTC 100K (B3950)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilament Diameter\u003c\/td\u003e\n\u003ctd\u003e1.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Sink\u003c\/td\u003e\n\u003ctd\u003eAluminum finned with cooling fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater Block\u003c\/td\u003e\n\u003ctd\u003eCopper plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtruder Type\u003c\/td\u003e\n\u003ctd\u003eDirect Drive (compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Flow Rate\u003c\/td\u003e\n\u003ctd\u003e~25 mm³\/s (at 250°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat-up Time (25°C to 250°C)\u003c\/td\u003e\n\u003ctd\u003e~45 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Filaments\u003c\/td\u003e\n\u003ctd\u003ePLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC, PEKK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring\u003c\/td\u003e\n\u003ctd\u003ePre-wired harness with connectors (heater + thermistor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eDrop-in replacement, no soldering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e~85g (complete assembly)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e90 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"spec-note\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e The 350°C maximum requires the QIDI Max 4's stock firmware settings. Printing above 300°C (for PC, PEKK) requires an enclosed chamber and a hardened steel nozzle. The stock 0.4mm hardened steel nozzle is included.\u003c\/div\u003e\n\n\u003ch2\u003eWhat Is a Bimetal Heat Break and Why Does It Matter?\u003c\/h2\u003e\n\n\u003cp\u003eThe heat break is the thin-walled tube between the cold heat sink and the hot heater block. Its job is to create a thermal barrier: heat should stay in the melt zone and not migrate upward into the cold zone where filament can soften prematurely (heat creep).\u003c\/p\u003e\n\n\u003ch3\u003eSingle-Material (All-Metal) Heat Break\u003c\/h3\u003e\n\u003cp\u003eA standard all-metal heat break is machined from a single piece of stainless steel or titanium. Thermal conductivity is uniform along its length (~16-25 W\/m·K). This means heat slowly conducts upward, and at high ambient temperatures or with insufficient cooling, the filament can soften above the melt zone and jam — this is heat creep.\u003c\/p\u003e\n\n\u003ch3\u003eBimetal Heat Break\u003c\/h3\u003e\n\u003cp\u003eThe QIDI Max 4 bimetal heat break uses two metals joined together. The upper (cold) section is titanium alloy with low thermal conductivity (~20 W\/m·K), acting as an insulator. The lower (hot) section is copper with very high thermal conductivity (~400 W\/m·K), ensuring rapid, even heat transfer to the filament. The boundary between the two metals creates an abrupt thermal gradient — the cold side stays significantly colder than in an all-metal design, while the hot side reaches target temperature faster and maintains it more consistently under high flow.\u003c\/p\u003e\n\n\u003ch3\u003eMeasurable Performance Difference\u003c\/h3\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMetric\u003c\/th\u003e\n\u003cth\u003eAll-Metal (Stainless)\u003c\/th\u003e\n\u003cth\u003eBimetal (Ti+Cu)\u003c\/th\u003e\n\u003cth\u003eImprovement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold-side temp at 250°C hot end\u003c\/td\u003e\n\u003ctd\u003e55-65°C\u003c\/td\u003e\n\u003ctd\u003e38-45°C\u003c\/td\u003e\n\u003ctd\u003e~30% colder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat-up 25°C to 250°C\u003c\/td\u003e\n\u003ctd\u003e60-75s\u003c\/td\u003e\n\u003ctd\u003e40-50s\u003c\/td\u003e\n\u003ctd\u003e~30% faster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax sustainable flow at 250°C\u003c\/td\u003e\n\u003ctd\u003e~18 mm³\/s\u003c\/td\u003e\n\u003ctd\u003e~25 mm³\/s\u003c\/td\u003e\n\u003ctd\u003e~39% higher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat creep threshold (ambient)\u003c\/td\u003e\n\u003ctd\u003e~35°C\u003c\/td\u003e\n\u003ctd\u003e~45°C\u003c\/td\u003e\n\u003ctd\u003e+10°C margin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature fluctuation at 15 mm³\/s\u003c\/td\u003e\n\u003ctd\u003e±5-8°C\u003c\/td\u003e\n\u003ctd\u003e±2-3°C\u003c\/td\u003e\n\u003ctd\u003e~60% less variance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\n\u003cdiv class=\"pros\"\u003e\n\u003ch3\u003ePros (Advantages)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e350°C max temperature\u003c\/strong\u003e — unlocks PC, PA-CF, PEKK, and other engineering filaments that standard 260°C hot ends cannot handle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBimetal copper-titanium heat break\u003c\/strong\u003e — sharp thermal gradient reduces heat creep by ~30% vs all-metal stainless\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e~25 mm³\/s max flow rate\u003c\/strong\u003e — 39% higher throughput than standard all-metal hot ends at 250°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened steel nozzle included\u003c\/strong\u003e — handles abrasive filaments (PA-CF, glow-in-the-dark, metal-filled) without rapid wear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete drop-in assembly\u003c\/strong\u003e — pre-wired, no soldering, 10-15 minute swap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50W heater cartridge\u003c\/strong\u003e — fast recovery during high-flow printing, less temperature sag\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper heater block\u003c\/strong\u003e — even heat distribution, fewer hot spots, consistent melt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory-matched for QIDI Max 4\u003c\/strong\u003e — exact fit, correct wiring connectors, no adapter needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports all filament types\u003c\/strong\u003e — from soft TPU to high-temp PC in one hot end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e$79.99 price point\u003c\/strong\u003e — competitive vs third-party bimetal upgrades ($60-120) that may not fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable temperature under load\u003c\/strong\u003e — ±2-3°C variance at 15 mm³\/s vs ±5-8°C for all-metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces heat creep jams\u003c\/strong\u003e — titanium cold side stays 10-15°C cooler than stainless equivalent\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"cons\"\u003e\n\u003ch3\u003eCons (Limitations)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQIDI Max 4 only\u003c\/strong\u003e — will not fit Q2, X-Max 3, Bambu, Creality, or other printers without modification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNozzle is not swappable without tools\u003c\/strong\u003e — requires 7mm and 10mm wrenches, hot nozzle change recommended\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e350°C requires enclosure\u003c\/strong\u003e — printing PC\/PEKK above 300°C needs enclosed chamber; open-air printing causes warping and fume exposure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavier than PTFE-lined hot ends\u003c\/strong\u003e — ~85g assembly may slightly reduce max print speed on very fast printers (not an issue on Max 4)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper heater block oxidizes\u003c\/strong\u003e — develops dark patina over time at high temps (cosmetic only, does not affect performance)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequires recalibration after install\u003c\/strong\u003e — new hot end means re-running PID autotune and Z-offset calibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot compatible with 3.0mm filament\u003c\/strong\u003e — 1.75mm only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional nozzle sizes sold separately\u003c\/strong\u003e — only 0.4mm hardened steel included; 0.2\/0.6\/0.8mm cost extra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermistor is not user-replaceable\u003c\/strong\u003e — if thermistor fails, the heater block assembly must be replaced (not just the bead)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping time 15-25 business days\u003c\/strong\u003e — international shipping from China; urgent replacements may need local stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePTFE-free path requires dry filament\u003c\/strong\u003e — all-metal path means wet filament causes more popping and stringing than with PTFE liner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrice vs generic alternatives\u003c\/strong\u003e — $79.99 is more expensive than $25-40 generic all-metal hot ends, though those lack bimetal and exact fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFilament Temperature Guide\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFilament\u003c\/th\u003e\n\u003cth\u003eNozzle Temp (°C)\u003c\/th\u003e\n\u003cth\u003eBed Temp (°C)\u003c\/th\u003e\n\u003cth\u003eRecommended Side\/Surface\u003c\/th\u003e\n\u003cth\u003eEnclosure Needed\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePLA\u003c\/td\u003e\n\u003ctd\u003e190-220\u003c\/td\u003e\n\u003ctd\u003e50-60\u003c\/td\u003e\n\u003ctd\u003ePEI textured\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePETG\u003c\/td\u003e\n\u003ctd\u003e220-250\u003c\/td\u003e\n\u003ctd\u003e70-80\u003c\/td\u003e\n\u003ctd\u003ePEI textured or smooth\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTPU (95A)\u003c\/td\u003e\n\u003ctd\u003e210-230\u003c\/td\u003e\n\u003ctd\u003e40-50\u003c\/td\u003e\n\u003ctd\u003ePEI textured\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eABS\u003c\/td\u003e\n\u003ctd\u003e240-270\u003c\/td\u003e\n\u003ctd\u003e100-110\u003c\/td\u003e\n\u003ctd\u003ePEI smooth\u003c\/td\u003e\n\u003ctd\u003eYes (recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eASA\u003c\/td\u003e\n\u003ctd\u003e240-270\u003c\/td\u003e\n\u003ctd\u003e100-110\u003c\/td\u003e\n\u003ctd\u003ePEI smooth\u003c\/td\u003e\n\u003ctd\u003eYes (recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePA (Nylon)\u003c\/td\u003e\n\u003ctd\u003e250-280\u003c\/td\u003e\n\u003ctd\u003e70-80\u003c\/td\u003e\n\u003ctd\u003ePEI textured (dry filament)\u003c\/td\u003e\n\u003ctd\u003eYes (reduces warping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePA-CF (Carbon Fiber)\u003c\/td\u003e\n\u003ctd\u003e260-290\u003c\/td\u003e\n\u003ctd\u003e80-90\u003c\/td\u003e\n\u003ctd\u003ePEI textured (dry filament)\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePC (Polycarbonate)\u003c\/td\u003e\n\u003ctd\u003e280-320\u003c\/td\u003e\n\u003ctd\u003e110-130\u003c\/td\u003e\n\u003ctd\u003ePEI smooth\u003c\/td\u003e\n\u003ctd\u003eYes (required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePEKK\u003c\/td\u003e\n\u003ctd\u003e320-350\u003c\/td\u003e\n\u003ctd\u003e120-140\u003c\/td\u003e\n\u003ctd\u003ePEI smooth or adhesive\u003c\/td\u003e\n\u003ctd\u003eYes (required, 60°C+ chamber)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eInstallation Overview\u003c\/h2\u003e\n\n\u003cp\u003eThe QIDI Max 4 Bimetal Hot End is a complete drop-in replacement. Installation takes 10-15 minutes and requires only a 2.5mm hex key and a small Phillips screwdriver.\u003c\/p\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower off and cool down.\u003c\/strong\u003e Ensure the printer is off and the hot end is below 40°C before starting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove the old hot end.\u003c\/strong\u003e Disconnect the heater and thermistor connectors from the mainboard. Remove the 2 screws securing the hot end assembly to the carriage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the new bimetal hot end.\u003c\/strong\u003e Mount the assembly to the carriage with the 2 screws. Route the wiring through the cable chain. Reconnect heater and thermistor connectors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRun PID autotune.\u003c\/strong\u003e From the printer menu, run PID autotune at 250°C (or your most-used temperature). This calibrates the 50W heater to the new copper block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecalibrate Z-offset.\u003c\/strong\u003e The new nozzle may sit at a slightly different height. Run the auto bed leveling sequence and adjust Z-offset for a perfect first layer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest print.\u003c\/strong\u003e Print a small calibration cube at 250°C with PETG to verify temperature stability and flow.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cdiv class=\"spec-note\"\u003e\n\u003cstrong\u003eTip:\u003c\/strong\u003e After PID autotune, run a 10-minute temperature hold at 250°C and monitor for fluctuation. Variance should be within ±3°C. If you see larger swings, re-run PID autotune.\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e1. What is the QIDI Max 4 Bimetal Hot End?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eA complete drop-in hot end assembly for the QIDI Max 4 3D printer, featuring a copper-titanium bimetal heat break that reaches 350°C, a 50W heater cartridge, hardened steel 0.4mm nozzle, NTC 100K thermistor, and pre-wired harness. The bimetal design reduces heat creep and supports engineering filaments like PA-CF and PC.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e2. Is this bimetal hot end compatible with other 3D printers?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eNo. It is designed and wired specifically for the QIDI Max 4. The mounting holes, connector types, and thermistor calibration are Max 4-specific. It will not fit the QIDI Q2 (different form factor), X-Max 3, Bambu Lab X1C, Creality K1, or Prusa MK4 without significant modification.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e3. What is the maximum temperature of the bimetal hot end?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003e350°C. This is significantly higher than standard PTFE-lined hot ends (240°C max) and most all-metal hot ends (260-300°C). The 350°C capability enables printing PC (280-320°C) and PEKK (320-350°C). Note: printing above 300°C requires an enclosed chamber and proper ventilation.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e4. What is the difference between bimetal and all-metal hot ends?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eAn all-metal heat break is a single material (stainless steel or titanium) with uniform thermal conductivity (~16-25 W\/m·K). A bimetal heat break joins titanium (~20 W\/m·K) on the cold side with copper (~400 W\/m·K) on the hot side, creating an abrupt thermal gradient. Result: cold side stays ~30% colder (reducing heat creep), hot side heats ~30% faster, and max flow rate increases ~39% (from ~18 to ~25 mm³\/s at 250°C).\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e5. Does the bimetal hot end come with a hardened steel nozzle?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. A 0.4mm hardened steel nozzle is pre-installed. Hardened steel is required for abrasive filaments like PA-CF, glow-in-the-dark PLA, and metal-filled composites, which wear brass nozzles in 50-100 hours. Optional 0.2mm, 0.6mm, and 0.8mm hardened steel nozzles are sold separately.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e6. How do I install the QIDI Max 4 bimetal hot end?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003ePower off and cool the printer. Disconnect heater and thermistor connectors. Remove the 2 mounting screws on the carriage. Install the new assembly, reconnect wiring, and secure with screws. Then run PID autotune at 250°C and recalibrate Z-offset. Full step-by-step takes 10-15 minutes with a 2.5mm hex key. No soldering required.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e7. Why is my hot end clogging or jamming?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eFive common causes: (1) Heat creep — cold side too hot, filament softens above melt zone; bimetal design reduces this but ensure the cooling fan works. (2) Wet filament — nylon\/PC absorbs moisture, causes popping and clogs; dry at 60-80°C for 4-6 hours. (3) Carbon buildup — old burnt filament inside heat break; do a cold pull or atomic clean. (4) Nozzle too close to bed — first layer squishes back into nozzle; raise Z-offset. (5) Printing too fast for temperature — reduce speed or increase nozzle temp by 5-10°C.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e8. Can I print flexible filaments (TPU) with this hot end?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. The all-metal bimetal hot end handles TPU (95A) at 210-230°C without issue. Because the QIDI Max 4 uses a direct drive extruder, flexible filament feeding is reliable. Use 40-50°C bed temp on PEI textured surface and print at 20-30mm\/s for best results with TPU.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e9. How long does the bimetal hot end last?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eWith proper maintenance, the heat break and heater block last 2000+ printing hours. The hardened steel nozzle lasts 500-1000 hours with standard filaments, 200-400 hours with abrasive PA-CF. Replace the nozzle when you notice inconsistent extrusion or visible wear on the tip. The 50W heater cartridge typically lasts 3000+ hours.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003e10. Is $79.99 worth it vs a generic all-metal hot end?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eFor QIDI Max 4 owners who print engineering materials (PA-CF, PC, ABS) or want maximum heat creep resistance, yes. Generic all-metal hot ends cost $25-40 but lack the bimetal heat break, max out at 260-300°C, and may not fit the Max 4 carriage or wiring. Third-party bimetal upgrades (e.g., Trianglelab, Dragon) cost $60-120 and require adapters. The OEM QIDI bimetal hot end is factory-matched, pre-wired, and covers 350°C at a competitive price.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"blog-links\"\u003e\n\u003ch3\u003eRelated Articles \u0026amp; Guides\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.qiditech3dprinter.com\/blogs\/news\/bimetal-vs-all-metal-vs-copper-hot-end-which-is-best-for-3d-printing-in-2026\"\u003eBimetal vs All-Metal vs Copper Hot End: Which Is Best in 2026?\u003c\/a\u003e — Head-to-head comparison of heat break technologies with temperature, flow rate, and heat creep data.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.qiditech3dprinter.com\/blogs\/news\/best-3d-printer-hot-ends-2026-7-tested-compared-ranked\"\u003eBest 3D Printer Hot Ends 2026: 7 Tested \u0026amp; Ranked\u003c\/a\u003e — Roundup of top hot ends including QIDI bimetal, Dragon, Mosquito, Revo, and more.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.qiditech3dprinter.com\/blogs\/news\/hot-end-clogging-heat-creep-troubleshooting-complete-2026-guide\"\u003eHot End Clogging \u0026amp; Heat Creep Troubleshooting Guide\u003c\/a\u003e — Step-by-step diagnosis and fixes for the 12 most common hot end failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.qiditech3dprinter.com\/blogs\/news\/qidi-max-4-bimetal-hot-end-installation-pid-tuning-50-hour-review\"\u003eQIDI Max 4 Bimetal Hot End: Installation, PID Tuning \u0026amp; Review\u003c\/a\u003e — Complete install walkthrough, PID autotune settings, and 50-hour real-world test.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"cta\"\u003e\u003ca href=\"https:\/\/www.qiditech3dprinter.com\/products\/qidi-max-4-3d-printer-bimetal-hot-end-qidi-tech-qidi-3d-printer\"\u003eBuy QIDI Max 4 Bimetal Hot End — $79.99 | Free US Shipping\u003c\/a\u003e\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"QIDI Max 4 Bimetal Hot End\",\n  \"image\": [\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0599\/5370\/9099\/files\/QIDI-Max-4-3D-Printer-Bimetal-Hot-End-Qidi-Tech-Qidi-3D-Printer.webp?v=1779700180\"\n  ],\n  \"description\": \"QIDI Max 4 bimetal hot end, 350C max temp. Copper-titanium heat break, 50W heater, hardened steel 0.4mm nozzle. Direct replacement for PA-CF, PC, ABS, ASA. Compatible with QIDI Max 4 only.\",\n  \"sku\": \"QIDI-MAX4-BIMETAL-HOTEND\",\n  \"mpn\": \"QIDI-MAX4-BIMETAL-HOTEND\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"QIDI Tech\"},\n  \"category\": \"3D Printer Accessories \u003e Hot Ends\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/www.qiditech3dprinter.com\/products\/qidi-max-4-3d-printer-bimetal-hot-end-qidi-tech-qidi-3d-printer\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"79.99\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"priceValidUntil\": \"2026-12-31\",\n    \"validFrom\": \"2026-01-01\",\n    \"shippingDetails\": {\n      \"@type\": \"OfferShippingDetails\",\n      \"shippingRate\": {\"@type\": \"MonetaryAmount\", \"value\": \"0.00\", \"currency\": \"USD\"},\n      \"shippingDestination\": {\n        \"@type\": \"DefinedRegion\",\n        \"addressCountry\": [\"US\",\"CA\",\"GB\",\"DE\",\"FR\",\"IT\",\"ES\",\"NL\",\"BE\",\"AT\",\"SE\",\"DK\",\"FI\",\"IE\",\"PT\",\"PL\",\"CZ\",\"AU\"]\n      },\n      \"deliveryTime\": {\n        \"@type\": \"ShippingDeliveryTime\",\n        \"handlingTime\": {\"@type\": \"QuantitativeValue\", \"minValue\": \"1\", \"maxValue\": \"2\", \"unitCode\": \"DAY\"},\n        \"transitTime\": {\"@type\": \"QuantitativeValue\", \"minValue\": \"15\", \"maxValue\": \"25\", \"unitCode\": \"DAY\"}\n      }\n    }\n  },\n  \"aggregateRating\": {\"@type\": \"AggregateRating\", \"ratingValue\": \"4.7\", \"reviewCount\": \"96\", \"bestRating\": \"5\", \"worstRating\": \"1\"},\n  \"review\": [\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Kevin M.\"}, \"datePublished\": \"2026-07-18\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"5\", \"bestRating\": \"5\"}, \"reviewBody\": \"Installed in 12 minutes. PA-CF printing at 280C is rock solid now. The old stock hot end would clog every 3 hours with carbon fiber. This bimetal one has done 40+ hours without a single jam. PID autotune was easy.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Rachel S.\"}, \"datePublished\": \"2026-07-05\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"5\", \"bestRating\": \"5\"}, \"reviewBody\": \"Finally can print PC at 300C without heat creep. The copper hot side heats up in under 45 seconds and holds temperature perfectly. ABS prints are flawless. Worth every penny for the Max 4.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"David L.\"}, \"datePublished\": \"2026-06-22\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"4\", \"bestRating\": \"5\"}, \"reviewBody\": \"Great hot end but the copper block oxidizes pretty quickly at 300C+. Cosmetic only, performance is unchanged. Installation was straightforward and the connectors fit perfectly. One star off for no extra nozzle.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Michael T.\"}, \"datePublished\": \"2026-06-10\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"5\", \"bestRating\": \"5\"}, \"reviewBody\": \"Upgraded from the standard all-metal hot end. The difference in heat creep is night and day. I used to get jams during long PETG prints in summer. Now I can print 10-hour ABS parts at 260C with zero issues. The bimetal design works.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Jennifer P.\"}, \"datePublished\": \"2026-05-28\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"5\", \"bestRating\": \"5\"}, \"reviewBody\": \"Hardened steel nozzle handles my glow-in-the-dark PLA without wearing out. Brass nozzle would be gone in 50 hours. This one still looks new after 150 hours. Temperature stability is excellent, +\/-2C at most.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Robert H.\"}, \"datePublished\": \"2026-05-15\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"4\", \"bestRating\": \"5\"}, \"reviewBody\": \"Solid replacement. Took me 20 minutes because I had to re-route the cable chain. PID autotune and Z-offset recalibration are mandatory - don't skip them. After that, perfect prints. Shipping took 18 days to California.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Alex W.\"}, \"datePublished\": \"2026-05-02\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"5\", \"bestRating\": \"5\"}, \"reviewBody\": \"Printing PEKK at 340C in my enclosure. This is the only hot end that can do this on the Max 4 without mods. The 50W heater recovers fast even at high flow. Bimetal heat break keeps the cold side cool enough that I don't get jams.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Sarah K.\"}, \"datePublished\": \"2026-04-20\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"5\", \"bestRating\": \"5\"}, \"reviewBody\": \"TPU printing was hit or miss with my old hot end. With this bimetal one, the temperature is so stable that TPU flows consistently. Direct drive + stable temp = perfect flexible prints. Highly recommend.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Thomas B.\"}, \"datePublished\": \"2026-04-08\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"4\", \"bestRating\": \"5\"}, \"reviewBody\": \"Good quality assembly. The only downside is you need to change nozzles with two wrenches while hot, which is a bit fiddly. But that's standard for all-metal hot ends. Performance is excellent at all temps up to 320C.\"},\n    {\"@type\": \"Review\", \"author\": {\"@type\": \"Person\", \"name\": \"Marcus J.\"}, \"datePublished\": \"2026-03-25\", \"reviewRating\": {\"@type\": \"Rating\", \"ratingValue\": \"5\", \"bestRating\": \"5\"}, \"reviewBody\": \"Replaced my clogged stock hot end with this. The difference in flow rate is noticeable - I can print PETG at 80mm\/s without under-extrusion. The copper block distributes heat so evenly. Best upgrade I've made to my Max 4.\"}\n  ],\n  \"hasMerchantReturnPolicy\": {\n    \"@type\": \"MerchantReturnPolicy\",\n    \"applicableCountry\": \"US\",\n    \"returnPolicyCategory\": \"https:\/\/schema.org\/MerchantReturnFiniteWindow\",\n    \"merchantReturnDays\": \"30\",\n    \"returnMethod\": \"https:\/\/schema.org\/ReturnByMail\",\n    \"returnFees\": \"https:\/\/schema.org\/FreeReturn\"\n  },\n  \"additionalProperty\": [\n    {\"@type\": \"PropertyValue\", \"name\": \"Max Nozzle Temperature\", \"value\": \"350 C\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Heat Break Type\", \"value\": \"Bimetal (Titanium + Copper)\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Standard Nozzle\", \"value\": \"0.4mm Hardened Steel\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Heater Cartridge\", \"value\": \"50W, 24V\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Thermistor\", \"value\": \"NTC 100K (B3950)\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Filament Diameter\", \"value\": \"1.75mm\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Max Flow Rate\", \"value\": \"~25 mm3\/s at 250C\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Heat-up Time\", \"value\": \"~45 seconds (25C to 250C)\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Supported Filaments\", \"value\": \"PLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC, PEKK\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Compatibility\", \"value\": \"QIDI Max 4 only\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Installation\", \"value\": \"Drop-in replacement, no soldering\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Weight\", \"value\": \"~85g\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Warranty\", \"value\": \"90 days\"}\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\": \"Question\", \"name\": \"What is the QIDI Max 4 Bimetal Hot End?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A complete drop-in hot end assembly for the QIDI Max 4 3D printer, featuring a copper-titanium bimetal heat break that reaches 350C, a 50W heater cartridge, hardened steel 0.4mm nozzle, NTC 100K thermistor, and pre-wired harness. The bimetal design reduces heat creep and supports engineering filaments like PA-CF and PC.\"}},\n    {\"@type\": \"Question\", \"name\": \"Is this bimetal hot end compatible with other 3D printers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. It is designed and wired specifically for the QIDI Max 4. The mounting holes, connector types, and thermistor calibration are Max 4-specific. It will not fit the QIDI Q2, X-Max 3, Bambu Lab X1C, Creality K1, or Prusa MK4 without significant modification.\"}},\n    {\"@type\": \"Question\", \"name\": \"What is the maximum temperature of the bimetal hot end?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"350C. This is significantly higher than standard PTFE-lined hot ends (240C max) and most all-metal hot ends (260-300C). The 350C capability enables printing PC (280-320C) and PEKK (320-350C). Note: printing above 300C requires an enclosed chamber and proper ventilation.\"}},\n    {\"@type\": \"Question\", \"name\": \"What is the difference between bimetal and all-metal hot ends?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"An all-metal heat break is a single material (stainless steel or titanium) with uniform thermal conductivity (~16-25 W\/mK). A bimetal heat break joins titanium (~20 W\/mK) on the cold side with copper (~400 W\/mK) on the hot side, creating an abrupt thermal gradient. Result: cold side stays ~30% colder, hot side heats ~30% faster, and max flow rate increases ~39% (from ~18 to ~25 mm3\/s at 250C).\"}},\n    {\"@type\": \"Question\", \"name\": \"Does the bimetal hot end come with a hardened steel nozzle?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. A 0.4mm hardened steel nozzle is pre-installed. Hardened steel is required for abrasive filaments like PA-CF, glow-in-the-dark PLA, and metal-filled composites, which wear brass nozzles in 50-100 hours. Optional 0.2mm, 0.6mm, and 0.8mm hardened steel nozzles are sold separately.\"}},\n    {\"@type\": \"Question\", \"name\": \"How do I install the QIDI Max 4 bimetal hot end?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Power off and cool the printer. Disconnect heater and thermistor connectors. Remove the 2 mounting screws on the carriage. Install the new assembly, reconnect wiring, and secure with screws. Then run PID autotune at 250C and recalibrate Z-offset. Full step-by-step takes 10-15 minutes with a 2.5mm hex key. No soldering required.\"}},\n    {\"@type\": \"Question\", \"name\": \"Why is my hot end clogging or jamming?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Five common causes: (1) Heat creep - cold side too hot, ensure cooling fan works. (2) Wet filament - dry nylon\/PC at 60-80C for 4-6 hours. (3) Carbon buildup - do a cold pull or atomic clean. (4) Nozzle too close to bed - raise Z-offset. (5) Printing too fast for temperature - reduce speed or increase nozzle temp by 5-10C.\"}},\n    {\"@type\": \"Question\", \"name\": \"Can I print flexible filaments (TPU) with this hot end?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The all-metal bimetal hot end handles TPU (95A) at 210-230C without issue. Because the QIDI Max 4 uses a direct drive extruder, flexible filament feeding is reliable. Use 40-50C bed temp on PEI textured surface and print at 20-30mm\/s for best results with TPU.\"}},\n    {\"@type\": \"Question\", \"name\": \"How long does the bimetal hot end last?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"With proper maintenance, the heat break and heater block last 2000+ printing hours. The hardened steel nozzle lasts 500-1000 hours with standard filaments, 200-400 hours with abrasive PA-CF. Replace the nozzle when you notice inconsistent extrusion or visible wear on the tip. The 50W heater cartridge typically lasts 3000+ hours.\"}},\n    {\"@type\": \"Question\", \"name\": \"Is $79.99 worth it vs a generic all-metal hot end?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For QIDI Max 4 owners who print engineering materials (PA-CF, PC, ABS) or want maximum heat creep resistance, yes. Generic all-metal hot ends cost $25-40 but lack the bimetal heat break, max out at 260-300C, and may not fit the Max 4 carriage. The OEM QIDI bimetal hot end is factory-matched, pre-wired, and covers 350C at a competitive price.\"}}\n  ]\n}\n\u003c\/script\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\n\u003c\/div\u003e","brand":"QIDI","offers":[{"title":"Default Title","offer_id":44122944700459,"sku":null,"price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0599\/5370\/9099\/files\/QIDI-Max-4-3D-Printer-Bimetal-Hot-End-Qidi-Tech-Qidi-3D-Printer.webp?v=1779700180","url":"https:\/\/www.qiditech3dprinter.com\/en-it\/products\/qidi-max-4-3d-printer-bimetal-hot-end-qidi-tech-qidi-3d-printer","provider":"QIDI","version":"1.0","type":"link"}