{"product_id":"gt2-10mm-timing-belt-smooth-tooth-idler-drive-pulley-16t-20t","title":"GT2 10mm Timng Belt Smooth Tooth Idler Drive Pulley 16T\/20T Bore 3 5 6 6.35 8mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 10mm Timing Belt Idler Drive Pulley — Smooth Tooth, 16T \u0026amp; 20T for Precision Motion Control\u003c\/h2\u003e\n\u003cp\u003eWhen your 3D printer, CNC router, or robotics build demands consistent belt tension and zero tooth-skip, a worn or mismatched idler pulley is the silent culprit. Engineers and makers who rely on GT2 belt systems need idler and drive pulleys that hold tight tolerances across thousands of cycles — these GT2 10mm smooth-tooth idler drive pulleys are built for exactly that workload.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy with a smooth-tooth GT2 profile, designed for 10mm-wide GT2 timing belts. Available in 16-tooth (16T) and 20-tooth (20T) configurations, with bore options ranging from 3mm to 8mm (approximately 0.12 in to 0.31 in). The compact hub fits standard shaft diameters used in RepRap, CoreXY, and similar open-frame motion systems.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CoreXY and Cartesian 3D printer belt path routing, CNC laser engraver X\/Y axis drive systems, and lightweight robotic arm joint drive assemblies — all applications where a GT2 10mm idler pulley replacement or upgrade is needed for smooth, low-backlash motion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for GT2 (2mm pitch) timing belts with 10mm belt width. Fits standard shaft diameters: 3mm, 5mm, 6mm, 6.35mm (1\/4\"), and 8mm. Verify your belt width and shaft diameter before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These GT2 10mm Idler Drive Pulleys\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eGT2 2mm Pitch Profile\u003c\/strong\u003e — Matches standard GT2 timing belts precisely, ensuring consistent tooth engagement and minimal backlash in motion systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003e10mm Belt Width Compatibility\u003c\/strong\u003e — Sized specifically for 10mm-wide GT2 belts, the most common width in desktop 3D printers and compact CNC machines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eMultiple Bore Options\u003c\/strong\u003e — Available in 3mm, 5mm, 6mm, 6.35mm, and 8mm bore diameters to match a wide range of motor and idler shaft sizes without adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003e16T \u0026amp; 20T Tooth Counts\u003c\/strong\u003e — Choose 16-tooth for tighter belt wrap in compact frames, or 20-tooth for smoother belt transition and lower belt stress in longer runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e — Lightweight yet rigid aluminum body resists deformation under belt tension, maintaining dimensional accuracy over extended use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Available in packs of 1, 5, 10, 20, or 50 pieces, making it easy to stock spares or outfit a full machine build in one order.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — GT2 Timing Belt Idler Drive Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Profile\u003c\/th\u003e\n\u003ctd\u003eGT2 (2mm pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e10mm (0.39 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e16T or 20T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e3mm \/ 5mm \/ 6mm \/ 6.35mm \/ 8mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Type\u003c\/th\u003e\n\u003ctd\u003eSmooth tooth (idler compatible)\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 Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural anodized aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 5 \/ 10 \/ 20 \/ 50 pcs (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose between 16T and 20T?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 16-tooth (16T) pulley has a smaller diameter, making it ideal for compact frames where belt wrap space is limited. The 20-tooth (20T) pulley offers a larger contact arc, which reduces belt stress and is preferred for longer belt runs or higher-speed applications. Check your printer or CNC frame design to confirm which tooth count is specified.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I select for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the bore to your motor or idler shaft diameter. Common sizes: NEMA 17 motors typically use a 5mm shaft; some use 6.35mm (1\/4\"). Idler shafts in 3D printers are often M3 (3mm) or M5 (5mm). Measure your shaft with calipers before ordering to ensure a proper fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys compatible with GT2 belts from other brands?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The GT2 2mm pitch profile is an open standard. These pulleys are compatible with any GT2 timing belt that is 10mm wide, regardless of brand, as long as the belt conforms to the GT2 tooth geometry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these be used as idler pulleys without a set screw?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are smooth-tooth idler drive pulleys. When used as idlers (free-spinning on a fixed shaft), they guide belt tension without driving the belt. When used as drive pulleys (fixed to a motor shaft), a set screw or press fit is required. Check the variant listing for set screw inclusion details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow resistant are these pulleys to wear over time?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe aluminum alloy construction provides good rigidity and wear resistance for typical 3D printing and light CNC duty cycles. For high-cycle industrial applications, inspect pulleys periodically for groove wear. The smooth-tooth profile distributes belt load evenly, which helps extend service life compared to sharp-tooth designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a drive pulley and an idler pulley?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA drive pulley is attached to a motor shaft and actively moves the belt. An idler pulley spins freely on a fixed shaft and is used to redirect or tension the belt. These smooth-tooth pulleys can serve both roles depending on your setup — as a drive pulley when fixed to a shaft, or as an idler when mounted on a bearing-equipped bolt.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I buy in bulk for a workshop or repair stock?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These pulleys are available in packs of 1, 5, 10, 20, or 50 pieces. Larger pack sizes offer a lower per-unit cost and are well-suited for repair shops, makerspaces, or builders assembling multiple machines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Type, Bore Size, and Pack Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"2GT - 20T \/ Belt Widths 10mm - Bore 6mm \/ 1","offer_id":52444160393490,"sku":"GYWHLBJT00377x1","price":7.55,"currency_code":"USD","in_stock":true},{"title":"2GT - 20T \/ Belt Widths 10mm - Bore 5mm \/ 1","offer_id":52444160426258,"sku":"GYWHLBJT00378x1","price":7.55,"currency_code":"USD","in_stock":true},{"title":"2GT - 20T \/ Belt Widths 10mm - Bore 6.35mm \/ 1","offer_id":52444160459026,"sku":"GYWHLBJT00379x1","price":7.55,"currency_code":"USD","in_stock":true},{"title":"2GT - 20T \/ Belt Widths 10mm - Bore 8mm \/ 1","offer_id":52444160491794,"sku":"GYWHLBJT00380x1","price":7.55,"currency_code":"USD","in_stock":true},{"title":"2GT - 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