{"product_id":"gt2-timing-pulley-synchronous-wheel-6mm-width","title":"GT2 Timing Pulley 16\/20\/30 Teeth Bore 5\/6\/8mm Width 6mm Synchronous Wheels Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 Timing Pulley — Precision Synchronous Drive for 3D Printers, CNC \u0026amp; Robotics\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or misaligned drive pulley throws off your print accuracy or CNC repeatability, the root cause is almost always an undersized or poorly toleranced synchronous wheel. Makers, engineers, and automation builders who demand consistent motion control need a GT2 timing pulley they can trust across long run times without backlash or belt skip.\u003c\/p\u003e\n\u003cp\u003eThese GT2 timing pulleys are machined aluminum wheels designed for use with standard 6mm-wide GT2 belts. Available in 16, 20, 30, 36, and 40 tooth counts, with bore options ranging from 3.17mm to 12mm (approximately 0.125\" to 0.472\"), they cover the most common shaft sizes used in desktop motion systems. Hub height varies by variant — typically 14–16mm — providing a stable seating surface for set-screw or press-fit mounting.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include FDM 3D printer X\/Y axis drives (GT2 belt linear motion), DIY CNC router and laser engraver feed systems, and lightweight robotic arm or conveyor synchronization projects where a reliable gt2 synchronous wheel gear is essential for repeatable 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\u003eCompatible with:\u003c\/strong\u003e Standard 6mm GT2 open or closed-loop belts \u0026amp; GT2 idler pulleys. Verify bore diameter matches your motor or shaft before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These GT2 Timing Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦷\u003c\/span\u003e \u003cstrong\u003eMultiple Tooth Counts\u003c\/strong\u003e\n\u003cp\u003eChoose from 16, 20, 30, 36, or 40 teeth to match your desired gear ratio and belt speed for precise motion control.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eWide Bore Range\u003c\/strong\u003e\n\u003cp\u003eBore options from 3.17mm to 12mm accommodate NEMA 17 stepper shafts (5mm), servo shafts, and custom CNC spindle diameters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eGT2 2mm Pitch Profile\u003c\/strong\u003e\n\u003cp\u003eStandard 2mm tooth pitch ensures full compatibility with GT2 belts used across the 3D printing and CNC maker ecosystem.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e \u003cstrong\u003e6mm Belt Width\u003c\/strong\u003e\n\u003cp\u003eDesigned for 6mm-wide GT2 belts — the most widely used width in desktop motion platforms — for a secure, low-slip drive interface.\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 from aluminum alloy for a low-inertia drive that reduces motor load while maintaining dimensional stability under continuous operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eSingle or 5-Pack Quantities\u003c\/strong\u003e\n\u003cp\u003eOrder a single pulley for a quick replacement or a 5-pack for full-axis builds and workshop stock — both options available for every variant.\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 Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Type\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\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e16 \/ 20 \/ 30 \/ 36 \/ 40 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e3.17mm \/ 4mm \/ 5mm \/ 6mm \/ 6.35mm \/ 7mm \/ 8mm \/ 10mm \/ 12mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Height\u003c\/th\u003e\n\u003ctd\u003eTypically 14–16mm (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\u003eNatural anodized \/ bare machined aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eSet screw (grub screw) — contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pc or 5 pcs (see 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\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 tooth count should I choose for my 3D printer?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMost NEMA 17-driven Cartesian and CoreXY printers use 20-tooth GT2 pulleys on the motor shaft. If you are replacing a worn pulley, match the existing tooth count. For custom builds, 20T is the standard starting point; higher tooth counts (30T, 40T) increase belt speed per motor revolution and are used in high-speed motion systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I select the correct bore diameter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your motor or shaft diameter with a caliper before ordering. NEMA 17 steppers typically have a 5mm shaft. Servo motors and CNC spindles vary — common sizes are 6mm, 6.35mm (1\/4\"), 8mm, and 10mm. Choose the bore that matches your shaft for a secure fit.\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. These pulleys work with both open-ended GT2 belt rolls and closed-loop GT2 belts, provided the belt width is 6mm and the pitch is 2mm. Always verify the belt width matches the pulley flange width before assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are aluminum GT2 pulleys compared to plastic ones?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum pulleys offer significantly better dimensional stability and wear resistance than injection-molded plastic pulleys. They resist deformation under belt tension and heat generated by continuous motor operation, making them the preferred choice for long-duration print runs and CNC cutting cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these pulleys resist corrosion in humid workshop environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum alloy has natural oxidation resistance that protects against light moisture exposure typical of indoor workshops. For environments with heavy condensation or chemical exposure, consider applying a light machine oil to the bore and hub area as a precaution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys with a 9mm or 10mm wide GT2 belt?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. These pulleys are designed specifically for 6mm-wide GT2 belts. Using a wider belt will cause the belt to ride over the flanges and slip off the pulley. If you need 9mm or 10mm belt compatibility, please contact us for alternative options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the 1-piece and 5-piece packing options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBoth options contain the same pulley. The 5-pack is ideal for full-axis builds (e.g., both X and Y motors plus spares), multi-machine workshops, or anyone who wants to keep replacement stock on hand. The per-unit price is lower in the 5-pack compared to buying five singles separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Number of Teeth, Bore \u0026amp; Height, and Width \u0026amp; Packing Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"30 \/ 5mm Bore \/ 6mm \u0026 1","offer_id":52444509110546,"sku":"KFCBJT00001x1","price":4.88,"currency_code":"USD","in_stock":true},{"title":"30 \/ 5mm Bore \/ 6mm \u0026 5","offer_id":52444509143314,"sku":"KFCBJT00001x5","price":15.9,"currency_code":"USD","in_stock":true},{"title":"40 \/ 12mm Bore \/ 6mm \u0026 1","offer_id":52444509176082,"sku":"KFCBJT00002x1","price":5.43,"currency_code":"USD","in_stock":true},{"title":"40 \/ 12mm Bore \/ 6mm \u0026 5","offer_id":52444509208850,"sku":"KFCBJT00002x5","price":18.35,"currency_code":"USD","in_stock":true},{"title":"40 \/ 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