{"product_id":"mellow-gt2-idler-gates-6mm-belt-kit-20t-timing-pulley-vzbot-3d-printer","title":"Mellow GT2 Idler \u0026 Gates 6mm Belt Kit – 20T VzBoT Pulley","description":"\n\u003ch2\u003eMellow Aluminium GT2 Idler Pulley \u0026amp; Gates 2GT 6mm Belt Kit for VzBoT 3D Printer\u003c\/h2\u003e\n\u003cp\u003eUpgrade your VzBoT 3D printer with this precision-engineered \u003cstrong\u003eMellow GT2 Idler and Gates Belt Kit\u003c\/strong\u003e. Developed in close collaboration with the VzBoT team, this kit pairs custom-machined aluminium toothed and smooth idler pulleys with genuine Gates (UNITTA) 2GT rubber belts — delivering the accuracy and consistency that high-performance CoreXY printing demands.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This Kit?\u003c\/h3\u003e\n\u003cp\u003eStandard pulleys are typically cut with general-purpose tooling, leaving tolerances that can cause belt skip and inconsistent motion. Mellow's toothed idlers are produced with \u003cstrong\u003eGates-supplied specialist tooling\u003c\/strong\u003e, ensuring teeth geometry perfectly matches the Gates 2GT belt profile. The result is minimal backlash, ultra-low vibration, and outstanding print quality.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Precision Surface Finish:\u003c\/strong\u003e Machined to a surface roughness of Ra 0.4 µm for exceptionally smooth belt travel.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenuine Gates 2GT Belt:\u003c\/strong\u003e 5 metres of authentic Gates (UNITTA) 6mm rubber belt — compatible tooth profile, high tensile strength, black colour.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eToothed Idlers:\u003c\/strong\u003e Allow the belt to glide freely while gently engaging belt teeth, preventing tooth damage through bends and curves.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmooth (Toothless) Idlers:\u003c\/strong\u003e Precision-flanged for constant belt tension across the full stroke — outperforming bare bearings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecial Tooth Surface Treatment:\u003c\/strong\u003e Reduces dust build-up during initial transmission and improves belt-to-pulley meshing for lower vibration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAluminium Alloy Construction:\u003c\/strong\u003e Lightweight yet rigid silver-anodised aluminium body, 5mm bore, 6.5mm gear width.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTeeth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20T (GT2 \/ 2GT profile)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGear Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBelt Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBelt Length Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 metres\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePulley Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminium Alloy (silver)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBelt Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRubber (Gates\/UNITTA)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBelt Colour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Printer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVzBoT 3D Printer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20TIBVZK\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  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSet 1:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6 × Toothed Idler Pulleys\u003c\/li\u003e\n  \u003cli\u003e2 × Smooth (Toothless) Idler Pulleys\u003c\/li\u003e\n  \u003cli\u003e5 × 1-Metre Gates 6mm Belt (5M total)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSet 2:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e4 × Toothed Idler Pulleys\u003c\/li\u003e\n  \u003cli\u003e4 × Smooth (Toothless) Idler Pulleys\u003c\/li\u003e\n  \u003cli\u003e5 × 1-Metre Gates 6mm Belt (5M total)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\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 — ideal for assembly work\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/ball-end-hex-screwdriver-bit-magnetic-reduced-shank-steel\"\u003eBall End Hex Screwdriver Bit – Magnetic Reduced Shank Steel\u003c\/a\u003e — perfect for precision fastening\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/10-pack-65mm-oscillating-multi-tool-saw-blades-high-carbon-steel\"\u003e10-Pack 65mm Oscillating Multi-Tool Saw Blades | Carbon Steel\u003c\/a\u003e — useful in your workshop toolkit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Are these idler pulleys compatible with all GT2 \/ 2GT 3D printers, or only the VzBoT?\u003c\/h4\u003e\n\u003cp\u003eA: While this kit is specifically designed and customised for the VzBoT CoreXY 3D printer, the 20-tooth GT2 idler pulleys with a 5mm bore and 6mm belt width are a standard GT2 specification. They can be used on other 3D printers that accept 20T GT2 pulleys with a 5mm bore and 6mm wide belts, provided the mechanical layout is compatible.\u003c\/p\u003e\n\u003ch4\u003eQ: What makes the Mellow toothed idlers better than standard bearing-based idlers?\u003c\/h4\u003e\n\u003cp\u003eA: Standard bearings do not engage the belt teeth, which can cause uneven tension and belt wear over time. Mellow's toothed idlers are produced using specialist Gates-supplied tooling, resulting in teeth that mesh precisely with the Gates 2GT belt profile. This minimises backlash, reduces vibration, and helps maintain consistent motion — critical for high-quality 3D prints.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the Gates belt included genuine Gates (UNITTA) brand?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The belt included in this kit is a genuine Gates (UNITTA) GT2 \/ 2GT rubber belt, 6mm wide. Gates and UNITTA are the same brand (UNITTA is Gates' Japanese division), and this belt is made to the same exacting standard used in industrial automation applications.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between Set 1 and Set 2?\u003c\/h4\u003e\n\u003cp\u003eA: Both sets include 5 metres of Gates 6mm belt and 8 idler pulleys total. Set 1 contains 6 toothed idlers and 2 smooth idlers. Set 2 contains 4 toothed idlers and 4 smooth idlers. Choose the set that matches your VzBoT build's specific idler placement requirements.\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\": \"Are these idler pulleys compatible with all GT2 \/ 2GT 3D printers, or only the VzBoT?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"While this kit is specifically designed and customised for the VzBoT CoreXY 3D printer, the 20-tooth GT2 idler pulleys with a 5mm bore and 6mm belt width are a standard GT2 specification. They can be used on other 3D printers that accept 20T GT2 pulleys with a 5mm bore and 6mm wide belts, provided the mechanical layout is compatible.\"}}, {\"@type\": \"Question\", \"name\": \"What makes the Mellow toothed idlers better than standard bearing-based idlers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Standard bearings do not engage the belt teeth, which can cause uneven tension and belt wear over time. Mellow's toothed idlers are produced using specialist Gates-supplied tooling, resulting in teeth that mesh precisely with the Gates 2GT belt profile. This minimises backlash, reduces vibration, and helps maintain consistent motion — critical for high-quality 3D prints.\"}}, {\"@type\": \"Question\", \"name\": \"Is the Gates belt included genuine Gates (UNITTA) brand?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The belt included in this kit is a genuine Gates (UNITTA) GT2 \/ 2GT rubber belt, 6mm wide. 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Choose the set that matches your VzBoT build's specific idler placement requirements.\"}}]}\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 GT2 Idler \u0026 Gates 6mm Belt Kit – 20T VzBoT Pulley\", \"item\": \"https:\/\/wb8bmu-rg.myshopify.com\/products\/mellow-gt2-idler-gates-6mm-belt-kit-20t-timing-pulley-vzbot-3d-printer\"}]}\u003c\/script\u003e","brand":"Xpnd","offers":[{"title":"AWD","offer_id":67748320870637,"sku":"14:350853#AWD","price":120.04,"currency_code":"USD","in_stock":true},{"title":"2WD","offer_id":67748320903405,"sku":"14:193#2WD","price":120.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0840\/1269\/5789\/files\/Ha013eddf03504b0196c6b6846233d684V.webp?v=1791895107","url":"https:\/\/xpndservice.com\/products\/mellow-gt2-idler-gates-6mm-belt-kit-20t-timing-pulley-vzbot-3d-printer","provider":"XPND","version":"1.0","type":"link"}