{"product_id":"mellow-rnc-nano-coated-dual-drive-gear-kit-ddg-sherpa-mini-extruder","title":"Mellow RNC Nano-Coated Dual Drive Gear Kit – DDG \u0026 Sherpa Mini","description":"\n\u003ch2\u003eMellow RNC Nitrogen-Based Chain Dual Drive Gear Kit for DDG \u0026amp; Sherpa Mini Extruders\u003c\/h2\u003e\n\u003cp\u003eUpgrade your 3D printer's extrusion system with the \u003cstrong\u003eMellow RNC Nano-Coated Dual Drive Gear Kit\u003c\/strong\u003e — engineered for precision, durability, and consistent filament control. Designed specifically for DDG and Sherpa Mini extruders, this hardened steel drive gear features an advanced RNC nitrogen-based chain nano-coating that delivers outstanding wear resistance and ultra-long service life.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose the Mellow RNC Drive Gear?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Precise Machining:\u003c\/strong\u003e Inner hole size accuracy of ±0.02mm ensures a perfect shaft fit with high concentricity, eliminating wobble and inconsistent extrusion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExceptional Grip:\u003c\/strong\u003e Arc tooth runout of just 0.03mm means filament is gripped tightly and uniformly — no slipping, with up to 15kg of driving force.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHRC60+ Hardened Steel Matrix:\u003c\/strong\u003e The hardened steel core delivers superior overall hardness for long-lasting performance, even with abrasive filaments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRNC Nano-Coating (HV3300):\u003c\/strong\u003e The surface RNC nitrogen-based chain nano-coating achieves an ultra-high hardness rating of HV3300 — dramatically extending gear life compared to uncoated alternatives.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll-Metal Design:\u003c\/strong\u003e Rated for printing temperatures up to 500°C, this fully metal construction is compatible with a wide range of filament types and high-temperature printing applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1.75mm Filament Compatible:\u003c\/strong\u003e Precision CNC-machined specifically for 1.75mm filament, guaranteeing consistent, reliable grip every print.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDDG Extruder\u003c\/li\u003e\n  \u003cli\u003eDDG WIND\u003c\/li\u003e\n  \u003cli\u003eNF Sunrise\u003c\/li\u003e\n  \u003cli\u003eSherpa Mini Extruder\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHardened Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface Coating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRNC Nitrogen-Based Chain Nano-Coating\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoating Hardness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHV3300\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Hardness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHRC60+\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInner Hole Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.02mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eArc Tooth Runout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.03mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Print Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFilament Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDriving Force\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15kg\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7RNCDG\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAssembly Required\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× RNC Nano-Coating Drive Gear\u003c\/li\u003e\n  \u003cli\u003e1× Pulley Shaft (3mm × 20mm)\u003c\/li\u003e\n  \u003cli\u003e2× Pulley Bearings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cp\u003eLooking for more tools and accessories? Check out our \u003ca href=\"\/products\/nitrile-work-gloves-anti-slip-full-finger-5-pair\"\u003e5-Pair Nitrile Work Gloves – Anti-Slip Full Finger Safety\u003c\/a\u003e for handling sharp components during assembly, or explore the \u003ca href=\"\/products\/ball-end-hex-screwdriver-bit-magnetic-reduced-shank-steel\"\u003eBall End Hex Screwdriver Bit – Magnetic Reduced Shank Steel\u003c\/a\u003e for precision fastening tasks. The \u003ca href=\"\/products\/10-pack-65mm-oscillating-multi-tool-saw-blades-high-carbon-steel\"\u003e10-Pack 65mm Oscillating Multi-Tool Saw Blades\u003c\/a\u003e are also great to have in your maker toolkit.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What extruders is the Mellow RNC Dual Drive Gear Kit compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The Mellow RNC Dual Drive Gear Kit is designed for use with the DDG Extruder, DDG WIND, NF Sunrise, and Sherpa Mini Extruder. Its precision CNC-machined design ensures a reliable fit and consistent filament drive performance across all compatible models.\u003c\/p\u003e\n\u003ch4\u003eQ: What makes the RNC nano-coating special compared to standard drive gears?\u003c\/h4\u003e\n\u003cp\u003eA: The RNC nitrogen-based chain nano-coating achieves an ultra-high surface hardness of HV3300, far exceeding standard uncoated gears. Combined with the HRC60+ hardened steel matrix, this results in a significantly longer-lasting drive gear that resists wear from abrasive filaments and heavy-duty printing cycles.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this kit require assembly?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, assembly is required. The kit includes 1× RNC nano-coated drive gear, 1× pulley shaft (3mm × 20mm), and 2× pulley bearings. It is designed as a DIY upgrade\/replacement component for compatible direct drive extruder systems.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this drive gear compatible with high-temperature filaments?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The all-metal construction is rated for printing temperatures up to 500°C, making it suitable for a wide variety of filament types including standard PLA, ABS, PETG, and high-temperature materials like PA, PC, and composites.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What extruders is the Mellow RNC Dual Drive Gear Kit compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The Mellow RNC Dual Drive Gear Kit is designed for use with the DDG Extruder, DDG WIND, NF Sunrise, and Sherpa Mini Extruder. 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The all-metal construction is rated for printing temperatures up to 500°C, making it suitable for a wide variety of filament types including standard PLA, ABS, PETG, and high-temperature materials like PA, PC, and composites.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/wb8bmu-rg.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/wb8bmu-rg.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Mellow RNC Nano-Coated Dual Drive Gear Kit – DDG \u0026 Sherpa Mini\", \"item\": \"https:\/\/wb8bmu-rg.myshopify.com\/products\/mellow-rnc-nano-coated-dual-drive-gear-kit-ddg-sherpa-mini-extruder\"}]}\u003c\/script\u003e","brand":"Xpnd","offers":[{"title":"1 Set","offer_id":67748384047341,"sku":"5:200007897#1 Set","price":55.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0840\/1269\/5789\/files\/H723a93c8b3154fd8a5e5fa16bfa42fe6L.webp?v=1791895655","url":"https:\/\/xpndservice.com\/products\/mellow-rnc-nano-coated-dual-drive-gear-kit-ddg-sherpa-mini-extruder","provider":"XPND","version":"1.0","type":"link"}