{"product_id":"gt2-timing-belt-pulley-30t-stepped-bore-cnc-3d-printer","title":"GT2 Timing Belt Pulleys 5mm-10mm Bore with Steps 30T 6mm\/10mm for CNC 3D Printer","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 Timing Belt Pulley 30T — Stepped Bore Precision Drive for CNC \u0026amp; 3D Printers\u003c\/h2\u003e\n\u003cp\u003eWhen a loose or mismatched pulley causes layer shifts on your 3D printer or positioning errors on your CNC router, the root cause is almost always an imprecise bore fit. Hobbyists, makers, and small-shop machinists who demand repeatable motion control need a pulley that locks onto the shaft without play — and that's exactly what these stepped-bore GT2 pulleys deliver.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy with a 30-tooth GT2 tooth profile. The stepped bore design accommodates shaft diameters ranging from 5 mm to 10 mm (approximately 0.20\" to 0.39\"), and belt widths of 6 mm or 10 mm (approximately 0.24\" or 0.39\") are available depending on your drive system. A set screw secures the pulley firmly to the shaft for zero-slip torque transmission.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include Cartesian and CoreXY 3D printer X\/Y axis drives, CNC router gantry belt drives, laser engraver motion systems, and DIY pick-and-place machines — anywhere a GT2 2 mm pitch belt is used for precise linear positioning.\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 GT2 2 mm pitch timing belts. Select your bore diameter and belt width from the variant options above to match your shaft and belt specifications.\u003c\/div\u003e\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 \u003cstrong\u003eStepped Bore Design\u003c\/strong\u003e\n\u003cp\u003eAccommodates multiple shaft diameters (5 mm, 6 mm, 6.35 mm, 8 mm, 10 mm) in a single pulley body, reducing the number of SKUs you need to stock for mixed-shaft machines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003e30-Tooth GT2 Profile\u003c\/strong\u003e\n\u003cp\u003eThe 30T tooth count and 2 mm pitch GT2 profile deliver smooth, low-backlash power transmission compatible with standard GT2 open and closed-loop belts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e \u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e\n\u003cp\u003eLightweight yet rigid aluminum alloy body resists deformation under belt tension, maintaining tooth engagement accuracy over extended print or cutting sessions.\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 set screw for positive shaft retention, preventing rotational slip during rapid direction changes common in 3D printer acceleration profiles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eDual Belt Width Options\u003c\/strong\u003e\n\u003cp\u003eAvailable in 6 mm and 10 mm belt width configurations, covering the two most common GT2 belt widths used in desktop CNC and FDM 3D printer builds.\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\u003eDimensionally consistent with standard GT2 30T pulleys used in popular open-source printer designs (Ender, Voron, RatRig, and similar platforms), making replacement straightforward.\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 — GT2 Timing Belt Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e30T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Pitch\u003c\/th\u003e\n\u003ctd\u003eGT2 (2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options (6 mm or 10 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (5 mm \/ 6 mm \/ 6.35 mm \/ 8 mm \/ 10 mm)\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 Retention\u003c\/th\u003e\n\u003ctd\u003eSet Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eApprox. 20 mm (0.79\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlange\u003c\/th\u003e\n\u003ctd\u003eFlanged (both sides)\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\u003eCompatible Belt\u003c\/th\u003e\n\u003ctd\u003eGT2 open belt \/ GT2 closed loop belt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity\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\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 bore diameter for my printer or CNC machine?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your motor shaft diameter with a caliper. Common stepper motor shaft sizes are 5 mm (NEMA 17 standard), 6.35 mm (1\/4\"), and 8 mm (larger NEMA 23 motors). Select the bore option that matches your shaft exactly — the stepped bore allows the pulley to fit snugly without an adapter sleeve.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between 6 mm and 10 mm belt width options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe belt width must match your existing GT2 belt. Most compact desktop 3D printers (Ender 3, Voron 0, etc.) use 6 mm wide GT2 belts, while larger-format machines and some CoreXY builds use 10 mm wide belts for higher load capacity. Check your belt width before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys compatible with GT2 closed-loop belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 30T GT2 tooth profile is compatible with both open-ended GT2 belts and GT2 closed-loop (loop) belts of the matching width. Ensure the loop belt's inner circumference is appropriate for your axis travel distance.\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 high acceleration?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe set screw provides firm mechanical retention suitable for typical 3D printer and light CNC router acceleration profiles (up to approximately 3,000–5,000 mm\/s²). For very high-acceleration applications, applying a small amount of thread-locking compound to the set screw is recommended for added security.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these pulleys corrode or degrade over time?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe aluminum alloy body with anodized finish offers good resistance to oxidation in normal indoor workshop environments. Avoid prolonged exposure to moisture or corrosive chemicals. The set screw is typically steel — if used in humid conditions, applying a light coat of machine oil to the screw is advisable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this pulley as a direct replacement for the stock pulley on my Ender 3 or similar printer?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The GT2 30T profile and 5 mm bore variant are dimensionally compatible with the stock X\/Y axis pulleys on Creality Ender 3, Ender 3 Pro, Ender 3 V2, and many other NEMA 17-driven printers. Select the 5 mm bore and 6 mm belt width variant for a direct drop-in fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know which variant combination to select?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYou need to match three parameters: (1) Belt Model — GT2 for all standard GT2 systems; (2) Number of pulley teeth — 30T is the most common for desktop machines; (3) Bore \u0026amp; Belt Width — select the bore that matches your motor shaft and the belt width that matches your existing belt. If unsure, contact us to confirm 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 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 \/ 30T \/ 6mm \u0026 10mm","offer_id":52444024373522,"sku":"KFCBJT00324x1","price":6.53,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 5mm \u0026 10mm","offer_id":52444024406290,"sku":"KFCBJT00325x1","price":7.89,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 6.35mm \u0026 6mm","offer_id":52444024439058,"sku":"KFCBJT00326x1","price":7.89,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 8mm \u0026 10mm","offer_id":52444024471826,"sku":"KFCBJT00327x1","price":7.89,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 6mm \u0026 6mm","offer_id":52444024504594,"sku":"KFCBJT00328x1","price":7.89,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 10mm \u0026 6mm","offer_id":52444024537362,"sku":"KFCBJT00329x1","price":7.89,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 5mm \u0026 6mm","offer_id":52444024570130,"sku":"KFCBJT00330x1","price":7.89,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 8mm \u0026 6mm","offer_id":52444024602898,"sku":"KFCBJT00331x1","price":7.89,"currency_code":"USD","in_stock":true},{"title":"2GT \/ 30T \/ 6.35mm \u0026 10mm","offer_id":52444024635666,"sku":"KFCBJT00332x1","price":7.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-03_cad065c0-f480-496a-8b0e-852581d53271.jpg?v=1783260394","url":"https:\/\/homediyer.com\/products\/gt2-timing-belt-pulley-30t-stepped-bore-cnc-3d-printer","provider":"HomeDIYer","version":"1.0","type":"link"}