{"product_id":"gt2-timing-belt-pulley-16-20-teeth-6mm-width","title":"GT2 Timing Belt Pulley 16\/20 Teeth 6mm Teeth Width Bore 3mm-8mm For 3D Printer","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 Timing Belt Pulley — Precise Motion Control for 3D Printers \u0026amp; CNC Builds\u003c\/h2\u003e\n\u003cp\u003eWhen a skipped tooth or misaligned pulley ruins a print or throws off a CNC cut, the root cause is almost always a low-tolerance drive component. Makers, engineers, and 3D printer builders who demand repeatable, backlash-free motion need a GT2 timing belt pulley they can trust across thousands of cycles.\u003c\/p\u003e\n\u003cp\u003eThese GT2 timing belt pulleys are machined from aluminum alloy with a smooth anodized finish, available in 16-tooth (2GT-16T) and 20-tooth (2GT-20T) configurations. Belt width is 6mm (0.24 in), matching standard GT2 open-loop and closed-loop belts. Bore sizes range from 3mm to 8mm (0.12–0.31 in), with both with-hole (set-screw) and without-hole styles to suit different shaft retention methods.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include Cartesian and CoreXY 3D printer X\/Y axis drives, DIY CNC router gantry systems, and lightweight robotics or automation projects requiring low-backlash GT2 belt drive pulleys for stepper motors.\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 Fits standard GT2 (2mm pitch) open and closed timing belts, 6mm width. Compatible with NEMA 17 stepper motor shafts (5mm bore) and common 3D printer motion systems including Ender, Voron, RatRig, and similar platforms. Verify your shaft diameter before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These GT2 Timing Belt Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🦷\u003c\/div\u003e\n\u003cstrong\u003e16T \u0026amp; 20T Options\u003c\/strong\u003e\n\u003cp\u003eChoose 16-tooth for higher torque and slower linear speed, or 20-tooth for faster travel — both use the same 2mm GT2 pitch for interchangeability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📏\u003c\/div\u003e\n\u003cstrong\u003e6mm Belt Width\u003c\/strong\u003e\n\u003cp\u003ePrecisely machined flanges keep the GT2 belt tracking straight under load, reducing edge wear and maintaining consistent tension over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cstrong\u003eWith or Without Set-Screw Hole\u003c\/strong\u003e\n\u003cp\u003eWith-hole variants include a radial set-screw port for positive shaft locking; without-hole variants suit press-fit or keyed shaft applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n\u003cstrong\u003eBore Range 3–8mm\u003c\/strong\u003e\n\u003cp\u003eAvailable in 3mm, 5mm, and 8mm bore diameters to fit a wide range of stepper motor and servo shaft sizes without adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🏗️\u003c\/div\u003e\n\u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e\n\u003cp\u003eLightweight yet rigid aluminum body keeps rotational inertia low — critical for fast direction changes in CoreXY and delta printer architectures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cstrong\u003eLow-Backlash GT2 Profile\u003c\/strong\u003e\n\u003cp\u003eThe GT2 tooth profile delivers smooth, low-noise power transmission with minimal backlash, making these pulleys suitable for precision positioning applications in 3D printing and CNC routing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — GT2 Timing Belt Pulley\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\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\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\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e6mm (0.24 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e3mm \/ 5mm \/ 8mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStyle\u003c\/th\u003e\n\u003ctd\u003eWith Hole (set-screw) \/ Without Hole (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\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eAnodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlange\u003c\/th\u003e\n\u003ctd\u003eDual flange for belt retention\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (16T)\u003c\/th\u003e\n\u003ctd\u003eApprox. 10.2mm (0.40 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (20T)\u003c\/th\u003e\n\u003ctd\u003eApprox. 12.7mm (0.50 in)\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\u003eCompatible Belt\u003c\/th\u003e\n\u003ctd\u003eGT2 6mm open\/closed loop timing belt\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\u003eWhat is the difference between 16T and 20T pulleys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth count determines the linear distance traveled per motor revolution. A 16-tooth pulley moves the belt approximately 32mm per revolution, while a 20-tooth pulley moves it 40mm. Use 16T for more torque and finer resolution, or 20T for faster travel speed with the same stepper motor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I choose for a NEMA 17 stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStandard NEMA 17 stepper motors have a 5mm output shaft diameter. Select the 5mm bore variant. If your motor has a D-shaped shaft, choose the \"With Hole\" style so the set screw can lock against the flat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between \"With Hole\" and \"Without Hole\" styles?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e\"With Hole\" pulleys have a radial set-screw port that lets you lock the pulley firmly to the motor shaft using an Allen key — ideal for most 3D printer and CNC applications. \"Without Hole\" pulleys are designed for press-fit, keyed, or bonded shaft installations where a set screw is not required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys compatible with standard GT2 belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These pulleys use the GT2 (2mm pitch) tooth profile and are compatible with any standard GT2 open-loop or closed-loop timing belt with 6mm width. They work with belts from common 3D printer suppliers and motion system kits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill aluminum pulleys wear out faster than steel ones?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor 3D printing and light CNC use, aluminum GT2 pulleys offer an excellent balance of weight and durability. The anodized surface resists wear under normal belt tension. Steel pulleys are typically only necessary in heavy industrial applications with very high belt loads or continuous high-speed operation beyond typical hobbyist use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys as idler pulleys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are drive pulleys designed to mount on a motor shaft. For idler applications (free-spinning belt guides), you would typically use a smooth idler pulley or a toothed idler with a bearing insert. The \"Without Hole\" variant can be adapted with a bearing in some custom builds, but this is not the primary intended use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know if this pulley will fit my 3D printer?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCheck your printer's motion system documentation for the belt pitch (should be GT2 \/ 2mm), belt width (6mm), and motor shaft diameter. Popular printers such as Creality Ender series, Voron 2.4, RatRig V-Core, and many others use GT2 6mm belts with NEMA 17 motors (5mm shaft). Confirm your specific model's BOM before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Model, Style, and Bore \u0026amp; Belt Width above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"2GT-20T \/ With Hole \/ 3mm \u0026 6mm","offer_id":52444024668434,"sku":"KFCBJT00388x1","price":5.85,"currency_code":"USD","in_stock":true},{"title":"2GT-16T \/ Without Hole \/ 5mm \u0026 6mm","offer_id":52444024701202,"sku":"KFCBJT00389x1","price":7.24,"currency_code":"USD","in_stock":true},{"title":"2GT-20T \/ Without Hole \/ 8mm \u0026 6mm","offer_id":52444024733970,"sku":"KFCBJT00390x1","price":7.24,"currency_code":"USD","in_stock":true},{"title":"2GT-20T \/ With Hole \/ 5mm \u0026 6mm","offer_id":52444024766738,"sku":"KFCBJT00391x1","price":7.24,"currency_code":"USD","in_stock":true},{"title":"2GT-16T \/ With Hole \/ 3mm \u0026 6mm","offer_id":52444024799506,"sku":"KFCBJT00392x1","price":7.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-05_ffe54162-7b18-429f-9ebd-d8f3c58067e4.jpg?v=1783260478","url":"https:\/\/homediyer.com\/products\/gt2-timing-belt-pulley-16-20-teeth-6mm-width","provider":"HomeDIYer","version":"1.0","type":"link"}