{"product_id":"gt2-timing-belt-pulley-16-20-24-25-26-teeth-6mm-10mm-cnc","title":"K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eGT2 Timing Belt Pulley — Precise Motion Control for CNC \u0026amp; Stepper Motor Builds\u003c\/h2\u003e\n    \u003cp\u003eWhen a slipping or mismatched pulley throws off your CNC router, 3D printer, or laser engraver, every axis move becomes unreliable. Makers, engineers, and automation hobbyists who need repeatable, low-backlash motion depend on a GT2 timing belt pulley that fits their belt width and bore exactly — without having to machine a custom part.\u003c\/p\u003e\n    \u003cp\u003eThese K-type GT2 timing belt pulleys are machined from aluminum alloy with a natural silver finish. They are available in 16, 20, 24, 25, and 26 tooth counts, compatible with both 6mm and 10mm wide GT2 belts, and offered in bore diameters ranging from 4mm to 8mm (approximately 5\/32\" to 5\/16\"). Each pulley features a set-screw bore for secure shaft clamping.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include GT2 belt-driven CNC router axis drives, RepRap and cartesian 3D printer X\/Y motion systems, and DIY laser engraver gantry builds where consistent tooth engagement and low-backlash GT2 pulley performance are critical to cut quality and dimensional accuracy.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for standard GT2 (2mm pitch) open or closed-loop timing belts in 6mm or 10mm widths. Verify your shaft diameter matches the selected bore size before ordering.\n  \u003c\/div\u003e\n\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\n        \u003cstrong\u003eMultiple Tooth Counts\u003c\/strong\u003e\n        \u003cp\u003eAvailable in 16, 20, 24, 25, and 26 teeth to match your drive ratio requirements for CNC, 3D printing, and automation projects.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n        \u003cstrong\u003eDual Belt Width Support\u003c\/strong\u003e\n        \u003cp\u003eCompatible with both 6mm and 10mm wide GT2 timing belts — select the width that matches your existing belt for a secure, rattle-free fit.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eWide Bore Range\u003c\/strong\u003e\n        \u003cp\u003eBore options from 4mm to 8mm (approx. 5\/32\" to 5\/16\") cover the most common stepper motor shaft diameters, including 5mm NEMA 17 and 6.35mm (1\/4\") shafts.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\n        \u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e\n        \u003cp\u003eMachined from aluminum alloy for a lightweight yet rigid build that resists deformation under continuous belt tension in high-cycle automation applications.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n        \u003cstrong\u003eSet-Screw Bore Clamping\u003c\/strong\u003e\n        \u003cp\u003eEach pulley includes a set-screw bore for positive shaft locking, preventing rotational slip during direction reversals and rapid acceleration moves.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eGT2 2mm Pitch Standard\u003c\/strong\u003e\n        \u003cp\u003eConforms to the GT2 (2mm pitch) tooth profile standard, ensuring consistent meshing with GT2 belts and interchangeability across common open-source motion platforms.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\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\u003eBelt Profile\u003c\/th\u003e\n\u003ctd\u003eGT2 (2mm pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e16 \/ 20 \/ 24 \/ 25 \/ 26 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBelt Width Compatibility\u003c\/th\u003e\n\u003ctd\u003e6mm \/ 10mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4mm \/ 5mm \/ 6mm \/ 6.35mm \/ 7mm \/ 8mm (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 silver (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Type\u003c\/th\u003e\n\u003ctd\u003eSet-screw clamping bore\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 Style\u003c\/th\u003e\n\u003ctd\u003eK-type (flanged)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right number of teeth for my build?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe tooth count determines your drive ratio. For 3D printers and CNC routers using NEMA 17 motors, 20 teeth is the most common choice and gives a good balance of speed and resolution. Use a higher tooth count (24–26) if you need faster travel speed, or a lower count (16) for finer resolution at the cost of top speed. Match the tooth count on both the motor pulley and idler\/driven pulley to your motion system's design.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich bore size fits a standard NEMA 17 stepper motor shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStandard NEMA 17 stepper motors have a 5mm output shaft. Select the 5mm bore variant for a direct fit. If your motor has a D-cut shaft, the set-screw will lock against the flat for a secure, slip-free connection.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between 6mm and 10mm belt width versions?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe belt width must match the pulley groove width. A 6mm belt pulley is standard for most desktop 3D printers and light CNC builds. A 10mm belt pulley is used in heavier-duty or wider-format machines where greater belt contact area and load capacity are needed. Check your existing belt width before selecting a variant.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these pulleys compatible with both open-loop and closed-loop GT2 belts?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. These pulleys are compatible with standard GT2 2mm-pitch timing belts in both open-ended (cut-to-length) and closed-loop configurations, provided the belt width matches the pulley groove (6mm or 10mm).\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill aluminum pulleys wear out faster than steel ones?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor typical DIY CNC, 3D printing, and light automation duty cycles, aluminum pulleys offer a practical service life. Aluminum is significantly lighter than steel, which reduces rotational inertia and benefits high-acceleration stepper motor systems. In very high-load or abrasive industrial environments, steel pulleys may be preferred, but for maker and hobbyist applications aluminum is the standard choice.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use a 6.35mm bore pulley on a 1\/4-inch shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. 6.35mm is the metric equivalent of 1\/4 inch (exactly 0.250\"). The 6.35mm bore variant is specifically suited for imperial-sized shafts commonly found in North American CNC routers and some servo motor platforms.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I secure the pulley to the shaft so it does not slip?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach pulley has a set-screw bore. Insert the shaft to the correct depth, align any D-flat or keyway if present, then tighten the set screw with an appropriate hex key (typically M3 or M4). For smooth round shafts, applying a small amount of thread-locking compound to the set screw is recommended to prevent loosening under vibration.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Number of Teeth, Belt Width, and Bore Width above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right number of teeth for my build?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The tooth count determines your drive ratio. For 3D printers and CNC routers using NEMA 17 motors, 20 teeth is the most common choice and gives a good balance of speed and resolution. Use a higher tooth count (24–26) if you need faster travel speed, or a lower count (16) for finer resolution at the cost of top speed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which bore size fits a standard NEMA 17 stepper motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard NEMA 17 stepper motors have a 5mm output shaft. Select the 5mm bore variant for a direct fit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between 6mm and 10mm belt width versions?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The belt width must match the pulley groove width. A 6mm belt pulley is standard for most desktop 3D printers and light CNC builds. A 10mm belt pulley is used in heavier-duty machines where greater belt contact area and load capacity are needed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these pulleys compatible with both open-loop and closed-loop GT2 belts?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. These pulleys are compatible with standard GT2 2mm-pitch timing belts in both open-ended and closed-loop configurations, provided the belt width matches the pulley groove (6mm or 10mm).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will aluminum pulleys wear out faster than steel ones?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For typical DIY CNC, 3D printing, and light automation duty cycles, aluminum pulleys offer a practical service life. Aluminum is lighter than steel, which reduces rotational inertia and benefits high-acceleration stepper motor systems.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use a 6.35mm bore pulley on a 1\/4-inch shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. 6.35mm is the metric equivalent of 1\/4 inch (exactly 0.250 inch). The 6.35mm bore variant is specifically suited for imperial-sized shafts commonly found in North American CNC routers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I secure the pulley to the shaft so it does not slip?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each pulley has a set-screw bore. Insert the shaft, align any D-flat if present, then tighten the set screw with a hex key. For smooth round shafts, applying thread-locking compound to the set screw is recommended to prevent loosening under vibration.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"16 Teeth \/ 6mm \/ 4mm \u0026 1 pcs","offer_id":52446645518610,"sku":"WSS065314x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"16 Teeth \/ 6mm \/ 5mm \u0026 1 pcs","offer_id":52446645551378,"sku":"WSS065315x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"16 Teeth \/ 6mm \/ 6mm \u0026 1 pcs","offer_id":52446645584146,"sku":"WSS065316x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"16 Teeth \/ 10mm \/ 5mm \u0026 1 pcs","offer_id":52446645616914,"sku":"WSS065317x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 6mm \/ 4mm \u0026 1 pcs","offer_id":52446645649682,"sku":"WSS065318x1","price":4.94,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 6mm \/ 5mm \u0026 1 pcs","offer_id":52446645682450,"sku":"WSS065319x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 6mm \/ 6mm \u0026 1 pcs","offer_id":52446645715218,"sku":"WSS065320x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 6mm \/ 6.35mm \u0026 1 pcs","offer_id":52446645747986,"sku":"WSS065321x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 6mm \/ 8mm \u0026 1 pcs","offer_id":52446645780754,"sku":"WSS065322x1","price":4.66,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 10mm \/ 4mm \u0026 1 pcs","offer_id":52446645813522,"sku":"WSS065323x1","price":6.02,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 10mm \/ 5mm \u0026 1 pcs","offer_id":52446645846290,"sku":"WSS065324x1","price":5.92,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 10mm \/ 6mm \u0026 1 pcs","offer_id":52446645879058,"sku":"WSS065325x1","price":5.92,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 10mm \/ 6.35mm \u0026 1 pcs","offer_id":52446645911826,"sku":"WSS065326x1","price":5.92,"currency_code":"USD","in_stock":true},{"title":"20 Teeth \/ 10mm \/ 8mm \u0026 1 pcs","offer_id":52446645944594,"sku":"WSS065327x1","price":5.92,"currency_code":"USD","in_stock":true},{"title":"24 Teeth \/ 6mm \/ 7mm \u0026 1 pcs","offer_id":52446645977362,"sku":"WSS065334x1","price":6.26,"currency_code":"USD","in_stock":true},{"title":"24 Teeth \/ 6mm \/ 8mm \u0026 1 pcs","offer_id":52446646010130,"sku":"WSS065335x1","price":6.26,"currency_code":"USD","in_stock":true},{"title":"24 Teeth \/ 10mm \/ 5mm \u0026 1 pcs","offer_id":52446646042898,"sku":"WSS065336x1","price":6.26,"currency_code":"USD","in_stock":true},{"title":"24 Teeth \/ 10mm \/ 6mm \u0026 1 pcs","offer_id":52446646075666,"sku":"WSS065337x1","price":6.26,"currency_code":"USD","in_stock":true},{"title":"24 Teeth \/ 10mm \/ 7mm \u0026 1 pcs","offer_id":52446646108434,"sku":"WSS065338x1","price":6.26,"currency_code":"USD","in_stock":true},{"title":"24 Teeth \/ 10mm \/ 8mm \u0026 1 pcs","offer_id":52446646141202,"sku":"WSS065339x1","price":6.26,"currency_code":"USD","in_stock":true},{"title":"25 Teeth \/ 6mm \/ 7mm \u0026 1 pcs","offer_id":52446646173970,"sku":"WSS065348x1","price":6.46,"currency_code":"USD","in_stock":true},{"title":"25 Teeth \/ 6mm \/ 8mm \u0026 1 pcs","offer_id":52446646206738,"sku":"WSS065349x1","price":6.46,"currency_code":"USD","in_stock":true},{"title":"25 Teeth \/ 10mm \/ 7mm \u0026 1 pcs","offer_id":52446646239506,"sku":"WSS065350x1","price":6.46,"currency_code":"USD","in_stock":true},{"title":"25 Teeth \/ 10mm \/ 8mm \u0026 1 pcs","offer_id":52446646272274,"sku":"WSS065351x1","price":6.46,"currency_code":"USD","in_stock":true},{"title":"26 Teeth \/ 6mm \/ 8mm \u0026 1 pcs","offer_id":52446646305042,"sku":"WSS065362x1","price":6.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of8_191c766e-3ad2-426e-880a-1ad43eaa2ef6.jpg?v=1784079628","url":"https:\/\/homediyer.com\/products\/gt2-timing-belt-pulley-16-20-24-25-26-teeth-6mm-10mm-cnc","provider":"HomeDIYer","version":"1.0","type":"link"}