{"product_id":"20-teeth-2gt-gt2-timing-pulley-bore-3-5-6-6-35-8mm-belt-width-10mm","title":"20 Teeth 2GT\/GT2 Timing Pulley Bore 3\/5\/6\/6.35\/8mm for Belt width 10mm 20 Teeth","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e20-Tooth 2GT Timing Pulley — Precise Belt Drive for 10mm GT2 Belts\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or misaligned belt drive throws off your motion system, the culprit is often an undersized or poorly toleranced pulley. Engineers, makers, and machine builders who rely on repeatable linear or rotary motion need a pulley that holds tight tolerances and fits their shaft without play. This 20-tooth 2GT\/GT2 timing pulley is machined to match the GT2 tooth profile exactly, giving you smooth, backlash-minimized power transfer every time.\u003c\/p\u003e\n\u003cp\u003eEach pulley features a 20-tooth GT2\/2GT tooth profile designed for use with 10mm-wide timing belts. The body is typically machined from aluminum alloy, offering a balance of light weight and rigidity. Bore options span 3 mm (~0.118 in), 5 mm (~0.197 in), 6 mm (~0.236 in), 6.35 mm (~0.250 in \/ ¼ in), and 8 mm (~0.315 in), with a set screw for secure shaft locking. Overall pulley outer diameter is typically 15–16 mm (~0.59–0.63 in).\u003c\/p\u003e\n\u003cp\u003eThis pulley is a go-to component for 3D printer X\/Y axis belt drive systems, CNC router gantry drives requiring precise 2GT belt timing pulley replacement, and robotics or automation rigs where a compact 20T GT2 pulley with multiple bore sizes keeps build flexibility high.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eCompatible with:\u003c\/strong\u003e 2GT \/ GT2 open-loop and closed-loop timing belts, 10mm belt width. Fits standard stepper motor shafts (3 mm, 5 mm, 6 mm, 6.35 mm, 8 mm). Commonly used with NEMA 17 and NEMA 23 stepper motors.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 2GT Timing Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦷\u003c\/span\u003e \u003cstrong\u003e20-Tooth GT2 Profile\u003c\/strong\u003e\n\u003cp\u003ePrecisely cut 2GT tooth geometry ensures full engagement with GT2 belts, minimizing backlash and maintaining positional accuracy in demanding motion control applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eMultiple Bore Sizes\u003c\/strong\u003e\n\u003cp\u003eAvailable in 3, 5, 6, 6.35, and 8 mm bore diameters to fit a wide range of motor and shaft standards — including the common ¼-inch (6.35 mm) imperial shaft size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003e10mm Belt Width Compatibility\u003c\/strong\u003e\n\u003cp\u003eFlanged pulley body is sized specifically for 10mm-wide 2GT\/GT2 timing belts, keeping the belt tracked and preventing lateral drift during operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eSet Screw Shaft Lock\u003c\/strong\u003e\n\u003cp\u003eIncludes a grub\/set screw for positive shaft retention. Prevents rotational slippage under load without requiring adhesive or press-fit assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e \u003cstrong\u003eLightweight Aluminum Construction\u003c\/strong\u003e\n\u003cp\u003eMachined aluminum body keeps rotating mass low — important for high-acceleration axes in 3D printers and CNC machines where inertia affects print or cut quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eDrop-In Replacement Fit\u003c\/strong\u003e\n\u003cp\u003eStandard 2GT tooth pitch and flange dimensions make this a direct drop-in replacement for worn or damaged pulleys on Ender, Voron, RatRig, and similar open-source machine platforms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 2GT Timing Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Profile\u003c\/th\u003e\n\u003ctd\u003e2GT \/ GT2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e20T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e10 mm (0.394 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Options\u003c\/th\u003e\n\u003ctd\u003e3 mm \/ 5 mm \/ 6 mm \/ 6.35 mm \/ 8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Pitch\u003c\/th\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003e15–16 mm (0.59–0.63 in)\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\u003eShaft Lock\u003c\/th\u003e\n\u003ctd\u003eSet screw (grub screw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlange\u003c\/th\u003e\n\u003ctd\u003eYes (both sides)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per piece, approx.)\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\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\u003eWhich bore size should I choose for my NEMA 17 stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMost NEMA 17 stepper motors have a 5 mm output shaft. Select the \u003cstrong\u003e5 mm bore\u003c\/strong\u003e variant for a direct fit. If your motor has a D-shaft, the set screw will engage the flat for a secure lock. For NEMA 23 motors, the shaft is typically 6.35 mm or 8 mm — check your motor's datasheet before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this pulley compatible with GT2 belts from other brands?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 2GT tooth profile is an open standard. This pulley is compatible with any GT2 \/ 2GT timing belt with a 2 mm pitch and 10 mm width, regardless of brand. It works with both open-loop belts and closed-loop GT2 belts of the appropriate length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this pulley on a Creality Ender 3 or similar 3D printer?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The Ender 3 and most Cartesian-style 3D printers use 20T GT2 pulleys with a 5 mm bore on their X and Y axes. This pulley is a direct replacement. Verify your belt width is 10 mm before purchasing — some machines use 6 mm belts, which require a different pulley.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the set screw connection? Will it slip under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe set screw provides reliable shaft retention for typical 3D printing and light CNC loads. For best results, tighten the set screw against the flat of a D-shaft if available, and use a small amount of thread-locking compound for high-vibration environments. For heavy industrial torque loads, a keyed shaft arrangement is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the aluminum body corrosion-resistant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum alloy naturally forms a thin oxide layer that provides good resistance to moisture and mild corrosion. For indoor workshop, 3D printer, or CNC environments this is more than adequate. If used in humid or outdoor conditions, an anodized finish variant offers additional protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between 2GT and GT2 — are they the same?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, 2GT and GT2 refer to the same tooth profile standard — a 2 mm pitch curvilinear tooth geometry. The naming convention varies by manufacturer but the dimensions are interchangeable. This pulley is fully compatible with belts labeled either GT2 or 2GT.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I select the right number of teeth for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 20-tooth pulley with 2 mm pitch moves the belt \u003cstrong\u003e40 mm per revolution\u003c\/strong\u003e (20 × 2 mm). This is the most common configuration for 3D printer axes and light CNC drives. If you need finer resolution, use a smaller pulley (e.g., 16T = 32 mm\/rev). If you need more speed or torque multiplication, pair with a larger driven pulley.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Belt Model, pulley teeth count, 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 \/ 6mm \u0026 10mm","offer_id":52444284322066,"sku":"KFCBJT00377x1","price":1.63,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 20T \/ 5mm \u0026 10mm","offer_id":52444284354834,"sku":"KFCBJT00378x1","price":2.31,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 20T \/ 6.35mm \u0026 10mm","offer_id":52444284387602,"sku":"KFCBJT00379x1","price":2.31,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 20T \/ 8mm \u0026 10mm","offer_id":52444284420370,"sku":"KFCBJT00380x1","price":2.31,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 20T \/ 3mm \u0026 10mm","offer_id":52444284453138,"sku":"KFCBJT00381x1","price":2.31,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 16T \/ 5mm \u0026 10mm","offer_id":52444284485906,"sku":"KFCBJT00382x1","price":2.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of6_5b92651a-1090-4b85-9a6e-11d5d0c9fdee.jpg?v=1783398341","url":"https:\/\/homediyer.com\/products\/20-teeth-2gt-gt2-timing-pulley-bore-3-5-6-6-35-8mm-belt-width-10mm","provider":"HomeDIYer","version":"1.0","type":"link"}