{"product_id":"gt2-timing-pulley-6mm-belt-synchronous-wheel-gear-3d-printer","title":"GT2 16-80T Timing Pulley 6mm Belt Synchronous Wheel Gear 3D Printer Bore 4-14mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 Timing Pulley 6mm Belt — Precise Synchronous Drive for 3D Printers \u0026amp; CNC Machines\u003c\/h2\u003e\n\u003cp\u003eWhen a skipped tooth or misaligned belt ruins a 20-hour print or throws off a CNC cut, the root cause is almost always a worn or imprecise pulley. Engineers, makers, and repair technicians who depend on repeatable motion control need a GT2 timing pulley they can trust across thousands of cycles. This listing covers the full GT2 16–80T synchronous wheel range so you can match the exact tooth count and bore diameter your build demands.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy with a natural silver finish and is designed for GT2 profile 6mm-wide open or closed timing belts. Tooth counts span 16T to 80T, and bore diameters range from 3.17mm (~0.125 in) to 14mm (~0.551 in), covering the most common motor shaft sizes used in desktop motion systems. Set-screw clamping secures the pulley to the shaft without adhesive.\u003c\/p\u003e\n\u003cp\u003eTypical applications include Cartesian and CoreXY 3D printer X\/Y axis drives, desktop CNC router feed systems, laser engraver gantry assemblies, and lightweight robotic arm joints — anywhere a GT2 6mm belt synchronous wheel gear is required for low-backlash linear or rotary 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 GT2 profile 6mm-wide timing belts (open or closed loop). Fits standard stepper motor shafts from 3.17mm to 14mm. Compatible with NEMA 17, NEMA 23, and equivalent motor frames commonly used in 3D printers, CNC routers, and laser engravers.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These GT2 Timing Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🦷\u003c\/div\u003e\n\u003cstrong\u003eWide Tooth Count Range\u003c\/strong\u003e\n\u003cp\u003eAvailable in 16T, 20T, 48T, 60T, and 80T configurations, giving you the gear ratio flexibility needed for both high-speed and high-torque motion profiles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cstrong\u003eMultiple Bore Sizes\u003c\/strong\u003e\n\u003cp\u003eBore options from 3.17mm to 14mm (including 4mm, 5mm, 6mm, 6.35mm, 8mm, 10mm, 12mm, and 14mm) cover virtually every common stepper and servo motor shaft diameter.\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 while maintaining dimensional stability under continuous belt tension — critical for accurate layer positioning in 3D printing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cstrong\u003eGT2 Profile Tooth Geometry\u003c\/strong\u003e\n\u003cp\u003eThe 2mm pitch GT2 tooth profile delivers smooth, low-noise belt engagement and minimal backlash, making it the industry standard for desktop motion control systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔧\u003c\/div\u003e\n\u003cstrong\u003eSet-Screw Shaft Clamping\u003c\/strong\u003e\n\u003cp\u003eM4 grub screws (included accessory option available) lock the pulley securely to the motor shaft without requiring adhesive or press-fit tooling, enabling quick field replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cstrong\u003eDrop-In Replacement Compatibility\u003c\/strong\u003e\n\u003cp\u003eDimensioned to match OEM pulleys on popular 3D printer platforms (Ender, Prusa-style, Voron, RatRig, and similar), reducing downtime when replacing worn synchronous wheel gears.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — GT2 Timing 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\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e16T, 20T, 48T, 60T, 80T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Options\u003c\/th\u003e\n\u003ctd\u003e3.17mm, 4mm, 5mm, 6mm, 6.35mm, 8mm, 10mm, 12mm, 14mm\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\u003eNatural anodized \/ silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft Fixing Method\u003c\/th\u003e\n\u003ctd\u003eSet screw (M4 grub screw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlange\u003c\/th\u003e\n\u003ctd\u003eSee 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 Length\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per piece)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003e3D printers, CNC routers, laser engravers, robotics\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 the right tooth count for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eTooth count determines your drive ratio and belt speed. Smaller pulleys (16T–20T) are typically used on motor shafts for high-speed, lower-torque applications like 3D printer X\/Y axes. Larger pulleys (48T–80T) are used as driven pulleys or where a speed reduction is needed. Match your tooth count to your existing belt loop length and the pulley on the opposite shaft to maintain correct belt tension.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I select 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 option. If your motor has a D-cut or flat on the shaft, the set screw will engage the flat for a more secure grip. For NEMA 23 motors, the shaft is typically 6.35mm or 8mm — check your motor datasheet before ordering.\u003c\/p\u003e\n\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\n\u003cp\u003eYes. The GT2 2mm pitch tooth profile is identical whether used with open-ended or closed-loop GT2 belts. Ensure the belt width is 6mm to match these pulleys. Using a wider or narrower belt will cause misalignment and accelerated wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the set-screw connection — will the pulley slip under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eWhen properly torqued against a clean, burr-free shaft, M4 set screws provide sufficient clamping force for typical 3D printer and light CNC loads. For higher-torque applications, select a bore with a D-flat shaft and align the set screw to the flat. Applying a small amount of thread-locking compound to the set screw threads further reduces the risk of loosening under vibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these pulleys corrode or degrade in a workshop environment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe aluminum alloy body offers good resistance to oxidation in typical indoor workshop conditions. The natural anodized finish adds a thin protective layer. Avoid prolonged exposure to cutting fluids, salt spray, or highly acidic environments, which can degrade the surface over time. For outdoor or high-humidity enclosures, consider applying a light protective coating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these as idler pulleys by removing the set screw?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are drive pulleys designed to be fixed to a rotating shaft. They are not designed as idler pulleys, which typically require a smooth bore and a bearing insert. Using a drive pulley as an idler without a bearing will cause shaft wear and inconsistent belt tension. For idler applications, use a dedicated smooth idler pulley with an integrated bearing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is included in the \"10pc M4 screws + 1pc Spanner\" variant option?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis accessory variant provides a pack of 10 M4 grub screws (set screws) and one spanner\/hex key tool — useful for replacing lost set screws or stocking spares when maintaining multiple machines. It does not include a pulley body; select a tooth count and bore variant if you need the pulley itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your tooth count and bore diameter above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"80T \/ 5mm","offer_id":52444190343442,"sku":"SSJWKKMX3266x1","price":21.6,"currency_code":"USD","in_stock":true},{"title":"80T \/ 8mm","offer_id":52444190376210,"sku":"SSJWKKMX3267x1","price":21.6,"currency_code":"USD","in_stock":true},{"title":"80T \/ 10mm","offer_id":52444190408978,"sku":"SSJWKKMX3268x1","price":21.6,"currency_code":"USD","in_stock":true},{"title":"80T \/ 12mm","offer_id":52444190441746,"sku":"SSJWKKMX3269x1","price":21.6,"currency_code":"USD","in_stock":true},{"title":"80T \/ 14mm","offer_id":52444190474514,"sku":"SSJWKKMX3270x1","price":21.6,"currency_code":"USD","in_stock":true},{"title":"60T \/ 5mm","offer_id":52444190507282,"sku":"SSJWKKMX3271x1","price":15.86,"currency_code":"USD","in_stock":true},{"title":"60T \/ 6mm","offer_id":52444190540050,"sku":"SSJWKKMX3272x1","price":15.86,"currency_code":"USD","in_stock":true},{"title":"60T \/ 6.35mm","offer_id":52444190572818,"sku":"SSJWKKMX3273x1","price":15.86,"currency_code":"USD","in_stock":true},{"title":"60T \/ 8mm","offer_id":52444190605586,"sku":"SSJWKKMX3274x1","price":15.86,"currency_code":"USD","in_stock":true},{"title":"60T \/ 10mm","offer_id":52444190638354,"sku":"SSJWKKMX3275x1","price":15.86,"currency_code":"USD","in_stock":true},{"title":"60T \/ 12mm","offer_id":52444190671122,"sku":"SSJWKKMX3276x1","price":15.86,"currency_code":"USD","in_stock":true},{"title":"48T \/ 5mm","offer_id":52444190703890,"sku":"SSJWKKMX3277x1","price":14.02,"currency_code":"USD","in_stock":true},{"title":"48T \/ 8mm","offer_id":52444190736658,"sku":"SSJWKKMX3278x1","price":14.02,"currency_code":"USD","in_stock":true},{"title":"48T \/ 10mm","offer_id":52444190769426,"sku":"SSJWKKMX3279x1","price":14.02,"currency_code":"USD","in_stock":true},{"title":"48T \/ 12mm","offer_id":52444190802194,"sku":"SSJWKKMX3280x1","price":14.02,"currency_code":"USD","in_stock":true},{"title":"20T \/ 4mm","offer_id":52444190834962,"sku":"SSJWKKMX3281x1","price":8.0,"currency_code":"USD","in_stock":true},{"title":"20T \/ 5mm","offer_id":52444190867730,"sku":"SSJWKKMX3282x1","price":8.0,"currency_code":"USD","in_stock":true},{"title":"20T \/ 6mm","offer_id":52444190900498,"sku":"SSJWKKMX3283x1","price":8.0,"currency_code":"USD","in_stock":true},{"title":"20T \/ 6.35mm","offer_id":52444190933266,"sku":"SSJWKKMX3284x1","price":8.0,"currency_code":"USD","in_stock":true},{"title":"20T \/ 8mm","offer_id":52444190966034,"sku":"SSJWKKMX3285x1","price":8.0,"currency_code":"USD","in_stock":true},{"title":"16T \/ 5mm","offer_id":52444190998802,"sku":"SSJWKKMX3286x1","price":7.92,"currency_code":"USD","in_stock":true},{"title":"20T \/ 3.17mm","offer_id":52444191031570,"sku":"SSJWKKMX3287x1","price":8.73,"currency_code":"USD","in_stock":true},{"title":"10pc * M4 screws + 1pc * Spanner \/ \/","offer_id":52444191064338,"sku":"SSJWKKMX3288x1","price":7.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-09_8fa54937-12f8-429e-8f2e-988fbe2b33c0.jpg?v=1783337461","url":"https:\/\/homediyer.com\/products\/gt2-timing-pulley-6mm-belt-synchronous-wheel-gear-3d-printer","provider":"HomeDIYer","version":"1.0","type":"link"}