{"product_id":"gt2-timing-belt-pulley-16-20-tooth-6mm-synchronous-wheel","title":"GT2 Timing Belt Pulley 16-20 Tooth Synchronous Wheel for 6mm Width Drive Belts","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 Timing Belt Pulley — Reliable Synchronous Drive for 6mm Belts\u003c\/h2\u003e\n\u003cp\u003eWhen your 3D printer skips steps, your CNC router loses position, or your DIY automation project demands repeatable motion, the weak link is almost always the drive pulley. These GT2 timing belt pulleys are engineered for makers, hobbyists, and small-workshop builders who need consistent, slip-free power transmission without overengineering their budget.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined to GT2 tooth profile standards and fits 6mm wide GT2 timing belts. Available in 16-tooth and 20-tooth configurations, with bore sizes of 5mm (~0.197 in) or 8mm (~0.315 in). Three material options are offered: aluminum alloy (standard and upgraded versions with set-screw retention) and iron material for higher-load applications. Outer diameter ranges typically from 10–14mm (~0.39–0.55 in) depending on tooth count.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include GT2 belt-driven 3D printer X\/Y axes, CNC router stepper motor drives, robotic arm joint actuators, and custom linear motion systems requiring precise synchronous timing.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for standard GT2 timing belts, 6mm width. Bore sizes 5mm and 8mm fit common NEMA 17 and NEMA 23 stepper motor shafts. Verify your shaft diameter and belt width before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These GT2 Timing Belt Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦷\u003c\/span\u003e\n\u003cstrong\u003e16 \u0026amp; 20 Tooth Options\u003c\/strong\u003e\n\u003cp\u003eChoose 16T for higher torque and slower linear speed, or 20T for faster travel — both machined to GT2 tooth profile for zero-slip synchronous drive.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eMultiple Bore Sizes\u003c\/strong\u003e\n\u003cp\u003eAvailable in 5mm and 8mm bore diameters to fit the most common stepper motor shaft sizes used in 3D printers, CNC machines, and robotics platforms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\n\u003cstrong\u003eThree Material Variants\u003c\/strong\u003e\n\u003cp\u003eAluminum Standard Edition for lightweight builds, Aluminum Upgraded Version with enhanced set-screw grip, and Iron Material for applications requiring greater load capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n\u003cstrong\u003eGT2 Profile Precision\u003c\/strong\u003e\n\u003cp\u003eTooth geometry conforms to GT2 belt standards, ensuring smooth meshing, reduced backlash, and consistent step accuracy across your motion system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\n\u003cp\u003eOrder as a single unit for prototyping or in 5-packs and 10-packs for production builds and spare-parts inventory — all at a consistent per-unit spec.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n\u003cstrong\u003e6mm Belt Width Compatibility\u003c\/strong\u003e\n\u003cp\u003ePrecisely sized for standard 6mm GT2 open-loop and closed-loop timing belts, the most widely used belt width in desktop CNC and 3D printing applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — GT2 Timing Belt Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eGT2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e16T \/ 20T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e5 mm \/ 8 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminum Alloy \/ Iron (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub \/ Flange\u003c\/th\u003e\n\u003ctd\u003eFlanged (belt retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSet Screw\u003c\/th\u003e\n\u003ctd\u003eIncluded (upgraded version: dual set screw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 PCS \/ 5 PCS \/ 10 PCS (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per unit)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich tooth count should I choose — 16T or 20T?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eChoose 16T if you need more torque and can accept slower linear belt speed — common in heavier gantry or high-force applications. Choose 20T for faster travel speeds with the same motor RPM, which is the standard choice for most desktop 3D printer X\/Y axes. Both use the same GT2 belt profile and 6mm belt width.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the Standard Edition and Upgraded Version?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBoth are aluminum alloy pulleys. The Upgraded Version features an enhanced set-screw configuration (typically dual set screws or a larger grub screw) for a more secure shaft grip, reducing the risk of slippage under higher acceleration or load. The Standard Edition is suitable for typical 3D printing and light CNC use.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen should I choose the Iron Material variant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe Iron Material variant is heavier than aluminum but offers greater strength and wear resistance under sustained high-load or high-torque conditions. It is a good choice for industrial-style CNC routers, heavier robotic joints, or any application where the pulley is subject to significant radial or axial forces.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these pulleys fit my NEMA 17 stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNEMA 17 stepper motors typically have a 5mm output shaft. Select the 5mm bore variant for a direct fit. If your motor has a 8mm shaft (common on some NEMA 23 motors), select the 8mm bore variant. Always verify your motor's shaft diameter in its datasheet before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys compatible with closed-loop GT2 belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. These pulleys are compatible with both open-ended GT2 timing belts and closed-loop GT2 belts, provided the belt width is 6mm. The GT2 tooth profile is standardized, so any GT2-profile belt of 6mm width will mesh correctly with these pulleys.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I secure the pulley to the motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach pulley includes a set screw (grub screw) that tightens against the motor shaft to lock the pulley in place. For the Upgraded Version, the enhanced set-screw design provides additional holding force. Use a hex key (Allen key) of the appropriate size to tighten. Ensure the set screw aligns with the flat of the motor shaft if one is present, for maximum grip.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys for a CoreXY or H-bot 3D printer build?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. GT2 6mm pulleys are the standard component for CoreXY, H-bot, and Cartesian 3D printer motion systems. The 20T variant is the most commonly specified tooth count for these architectures. Order the 5mm bore to match standard NEMA 17 motor shafts used in these builds.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Tooth count, Bore size, and Pack quantity above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which tooth count should I choose — 16T or 20T?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Choose 16T if you need more torque and can accept slower linear belt speed. Choose 20T for faster travel speeds, which is the standard choice for most desktop 3D printer X\/Y axes. Both use the same GT2 belt profile and 6mm belt width.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the Standard Edition and Upgraded Version?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Both are aluminum alloy pulleys. The Upgraded Version features an enhanced set-screw configuration for a more secure shaft grip, reducing slippage under higher acceleration or load.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"When should I choose the Iron Material variant?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Iron Material variant offers greater strength and wear resistance under sustained high-load or high-torque conditions, suitable for industrial CNC routers, heavier robotic joints, or high-force applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will these pulleys fit my NEMA 17 stepper motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"NEMA 17 stepper motors typically have a 5mm output shaft. Select the 5mm bore variant for a direct fit. Always verify your motor's shaft diameter before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these pulleys compatible with closed-loop GT2 belts?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. These pulleys are compatible with both open-ended and closed-loop GT2 timing belts of 6mm width. The GT2 tooth profile is standardized.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I secure the pulley to the motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each pulley includes a set screw that tightens against the motor shaft. Use a hex key to tighten. Align the set screw with the flat of the motor shaft if present for maximum grip.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these pulleys for a CoreXY or H-bot 3D printer build?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. GT2 6mm pulleys are the standard component for CoreXY, H-bot, and Cartesian 3D printer motion systems. The 20T variant with 5mm bore is the most commonly specified configuration for these builds.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"16 Tooth \/ 6 mm \/ 5 mm \u0026 1 PCS","offer_id":52446689853714,"sku":"GYJLTBJT00718x1","price":6.79,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Standard Edition \/ 6 mm \/ 5 mm \u0026 1 PCS","offer_id":52446689886482,"sku":"GYJLTBJT00722x1","price":7.14,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Upgraded Version \/ 6 mm \/ 5 mm \u0026 1 PCS","offer_id":52446689919250,"sku":"GYJLTBJT00720x1","price":8.09,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Iron Material \/ 6 mm \/ 5 mm \u0026 1 PCS","offer_id":52446689952018,"sku":"GYJLTBJT00719x1","price":7.19,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Standard Edition \/ 6 mm \/ 8 mm \u0026 1 PCS","offer_id":52446689984786,"sku":"GYJLTBJT00717x1","price":7.14,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Upgraded Version \/ 6 mm \/ 8 mm \u0026 1 PCS","offer_id":52446690017554,"sku":"GYJLTBJT00721x1","price":8.09,"currency_code":"USD","in_stock":true},{"title":"16 Tooth \/ 6 mm \/ 5 mm \u0026 5 PCS","offer_id":52446690050322,"sku":"GYJLTBJT00718x5","price":12.58,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Standard Edition \/ 6 mm \/ 5 mm \u0026 5 PCS","offer_id":52446690083090,"sku":"GYJLTBJT00722x5","price":12.58,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Upgraded Version \/ 6 mm \/ 5 mm \u0026 5 PCS","offer_id":52446690115858,"sku":"GYJLTBJT00720x5","price":21.88,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Iron Material \/ 6 mm \/ 5 mm \u0026 5 PCS","offer_id":52446690148626,"sku":"GYJLTBJT00719x5","price":14.35,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Standard Edition \/ 6 mm \/ 8 mm \u0026 5 PCS","offer_id":52446690181394,"sku":"GYJLTBJT00717x5","price":12.58,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Upgraded Version \/ 6 mm \/ 8 mm \u0026 5 PCS","offer_id":52446690214162,"sku":"GYJLTBJT00721x5","price":21.88,"currency_code":"USD","in_stock":true},{"title":"16 Tooth \/ 6 mm \/ 5 mm \u0026 10 PCS","offer_id":52446690246930,"sku":"GYJLTBJT00718x10","price":23.11,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Standard Edition \/ 6 mm \/ 5 mm \u0026 10 PCS","offer_id":52446690279698,"sku":"GYJLTBJT00722x10","price":23.11,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Upgraded Version \/ 6 mm \/ 5 mm \u0026 10 PCS","offer_id":52446690312466,"sku":"GYJLTBJT00720x10","price":41.68,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Iron Material \/ 6 mm \/ 5 mm \u0026 10 PCS","offer_id":52446690345234,"sku":"GYJLTBJT00719x10","price":26.59,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Standard Edition \/ 6 mm \/ 8 mm \u0026 10 PCS","offer_id":52446690378002,"sku":"GYJLTBJT00717x10","price":23.11,"currency_code":"USD","in_stock":true},{"title":"20 Tooth Upgraded Version \/ 6 mm \/ 8 mm \u0026 10 PCS","offer_id":52446690410770,"sku":"GYJLTBJT00721x10","price":41.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-02_2de517d2-545d-4f22-8c79-7be69014c9a3.jpg?v=1784084870","url":"https:\/\/homediyer.com\/products\/gt2-timing-belt-pulley-16-20-tooth-6mm-synchronous-wheel","provider":"HomeDIYer","version":"1.0","type":"link"}