{"product_id":"gt2-40-tooth-timing-belt-pulley-10mm-width","title":"40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 40 Tooth Timing Belt Pulley — Precise Synchronous Drive for 10 mm Width Belts\u003c\/h2\u003e\n\u003cp\u003eWhen your 3D printer skips steps, your CNC router loses position, or your DIY automation project demands repeatable accuracy, the weak link is almost always the drive pulley. Makers, engineers, and workshop builders who rely on GT2 belt systems need a 40-tooth synchronous wheel that holds tight tolerances without slop or wobble — every single cycle.\u003c\/p\u003e\n\u003cp\u003eThis GT2 timing belt pulley is machined for 10 mm wide GT2 drive belts and is available in bore diameters ranging from 5 mm to 12 mm (approximately 0.20 in to 0.47 in). Each pulley features 40 evenly spaced teeth with a 2 mm GT2 tooth pitch, a flanged rim to keep the belt tracking true, and a set-screw hub for secure shaft mounting. Packs of 1, 2, 5, or 10 pieces let you stock exactly what your build requires.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CoreXY and Cartesian 3D printer motion systems requiring consistent belt tension, CNC router axis drives where positional accuracy is non-negotiable, and lightweight robotic arm or conveyor automation projects that depend on synchronous torque transfer without belt slip.\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 open-loop and closed-loop timing belts with 10 mm width and 2 mm pitch. 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 40 Tooth 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\u003e40-Tooth GT2 Profile\u003c\/strong\u003e\n\u003cp\u003eForty evenly spaced 2 mm-pitch GT2 teeth deliver smooth, low-backlash power transmission — ideal for motion systems where positional repeatability matters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n\u003cstrong\u003e10 mm Belt Width Compatibility\u003c\/strong\u003e\n\u003cp\u003eFlanged rim keeps your 10 mm GT2 belt centered and prevents lateral drift during high-speed or high-cycle operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eMultiple Bore Sizes Available\u003c\/strong\u003e\n\u003cp\u003eChoose from 5 mm, 6 mm, 6.35 mm (1\/4 in), 8 mm, 10 mm, or 12 mm bore diameters to match your motor shaft or drive shaft without adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n\u003cstrong\u003eSet-Screw Hub Mounting\u003c\/strong\u003e\n\u003cp\u003eIntegrated set-screw secures the pulley firmly to the shaft, preventing rotational slip under load and simplifying installation without special tooling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\n\u003cp\u003eAvailable in 1, 2, 5, or 10-piece packs — order a single replacement or stock up for multi-axis builds and production runs at a lower per-unit cost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\n\u003cstrong\u003eLightweight Aluminum Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from aluminum alloy, these pulleys keep rotating mass low — reducing motor load and improving acceleration response in fast-moving motion systems.\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\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e40 Teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Profile\u003c\/th\u003e\n\u003ctd\u003eGT2\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\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (5 \/ 6 \/ 6.35 \/ 8 \/ 10 \/ 12 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\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eSet-screw hub\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\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003eSee variant options (1 \/ 2 \/ 5 \/ 10 PCS)\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\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\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right bore size for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or drive shaft diameter with a caliper. Common stepper motor shaft sizes are 5 mm and 6.35 mm (1\/4 in); larger servo or NEMA 23 motors often use 8 mm or 10 mm shafts. Select the bore that matches your shaft exactly — the set-screw will secure it in place. If your shaft is between sizes, choose the next size up and use a shaft collar or shim.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs a 40-tooth pulley the right tooth count for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eTooth count determines the pulley's pitch diameter and, combined with your belt length and the driven pulley's tooth count, sets your gear ratio. A 40-tooth GT2 pulley has a pitch diameter of approximately 25.46 mm (1.00 in). For 3D printers and CNC routers, 40-tooth pulleys are commonly paired with 20-tooth pulleys to achieve a 2:1 reduction, or used in matched pairs for a 1:1 direct drive. Check your machine's motion design to confirm compatibility.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this pulley fit standard GT2 open-loop and closed-loop belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. This pulley is machined to the GT2 tooth profile with a 2 mm pitch, which is compatible with both open-loop GT2 timing belts and closed-loop GT2 drive belts that are 10 mm wide. It is not compatible with GT3, HTD, or T2.5 belt profiles.\u003c\/p\u003e\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\u003cp\u003eThe set-screw hub provides a firm mechanical lock when tightened to the recommended torque using an appropriate hex key. For most 3D printer and light CNC applications, this connection is more than adequate. For high-torque or high-vibration environments, ensure the shaft has a flat (D-cut) for the set-screw to bear against, which significantly increases holding force and prevents rotational slip.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the pulley have flanges to keep the belt from slipping off?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. This pulley includes flanges on both sides of the tooth section. The flanges guide the 10 mm GT2 belt and prevent it from walking off the pulley edge during operation, which is especially important in high-speed or vertically oriented belt runs.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I order 1 PCS or a multi-pack?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eIf you are replacing a single failed pulley on an existing machine, the 1 PCS option is the most economical choice. For new multi-axis builds (such as CoreXY 3D printers that use two X\/Y pulleys), the 2 PCS pack ensures matched parts from the same batch. The 5 PCS and 10 PCS packs offer a lower per-unit cost and are ideal for workshop stock, classroom labs, or production of multiple machines.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this pulley compatible with NEMA 17 stepper motors?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNEMA 17 stepper motors typically have a 5 mm shaft diameter. Select the 5 mm bore variant for a direct fit. The 6.35 mm (1\/4 in) bore variant is commonly used with NEMA 23 motors. Always verify your specific motor's shaft diameter in its datasheet before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Bore \u0026amp; Amount 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 bore size for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor or drive shaft diameter with a caliper. Common stepper motor shaft sizes are 5 mm and 6.35 mm (1\/4 in); larger servo or NEMA 23 motors often use 8 mm or 10 mm shafts. Select the bore that matches your shaft exactly — the set-screw will secure it in place.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is a 40-tooth pulley the right tooth count for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A 40-tooth GT2 pulley has a pitch diameter of approximately 25.46 mm (1.00 in). For 3D printers and CNC routers, 40-tooth pulleys are commonly paired with 20-tooth pulleys for a 2:1 reduction, or used in matched pairs for 1:1 direct drive.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this pulley fit standard GT2 open-loop and closed-loop belts?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. This pulley is machined to the GT2 tooth profile with a 2 mm pitch, compatible with both open-loop and closed-loop GT2 timing belts that are 10 mm wide. It is not compatible with GT3, HTD, or T2.5 belt profiles.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is the set-screw connection — will it slip under load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The set-screw hub provides a firm mechanical lock when tightened correctly. For high-torque environments, ensure the shaft has a D-cut flat for the set-screw to bear against, which significantly increases holding force.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the pulley have flanges to keep the belt from slipping off?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. This pulley includes flanges on both sides of the tooth section to guide the 10 mm GT2 belt and prevent it from walking off the pulley edge during operation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Should I order 1 PCS or a multi-pack?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For a single replacement, the 1 PCS option is most economical. For multi-axis builds like CoreXY 3D printers, the 2 PCS pack ensures matched parts. The 5 and 10 PCS packs offer lower per-unit cost for workshop stock or production of multiple machines.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this pulley compatible with NEMA 17 stepper motors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"NEMA 17 stepper motors typically have a 5 mm shaft. Select the 5 mm bore variant for a direct fit. The 6.35 mm bore variant suits NEMA 23 motors. Always verify your motor's shaft diameter in its datasheet.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"40 Tooth \/ 10 mm \/ 5 mm \u0026 1 PCS","offer_id":52446690771218,"sku":"GYJLTBJT02382x1","price":9.93,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6 mm \u0026 1 PCS","offer_id":52446690803986,"sku":"GYJLTBJT02380x1","price":10.46,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6.35 mm \u0026 1 PCS","offer_id":52446690836754,"sku":"GYJLTBJT02385x1","price":10.46,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 8 mm \u0026 1 PCS","offer_id":52446690869522,"sku":"GYJLTBJT02381x1","price":10.46,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 10 mm \u0026 1 PCS","offer_id":52446690902290,"sku":"GYJLTBJT02383x1","price":10.46,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 12 mm \u0026 1 PCS","offer_id":52446690935058,"sku":"GYJLTBJT02384x1","price":10.46,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 5 mm \u0026 2 PCS","offer_id":52446690967826,"sku":"GYJLTBJT02382x2","price":18.07,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6 mm \u0026 2 PCS","offer_id":52446691000594,"sku":"GYJLTBJT02380x2","price":18.07,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6.35 mm \u0026 2 PCS","offer_id":52446691033362,"sku":"GYJLTBJT02385x2","price":18.07,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 8 mm \u0026 2 PCS","offer_id":52446691066130,"sku":"GYJLTBJT02381x2","price":18.07,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 10 mm \u0026 2 PCS","offer_id":52446691098898,"sku":"GYJLTBJT02383x2","price":18.07,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 12 mm \u0026 2 PCS","offer_id":52446691131666,"sku":"GYJLTBJT02384x2","price":18.07,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 5 mm \u0026 5 PCS","offer_id":52446691164434,"sku":"GYJLTBJT02382x5","price":42.01,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6 mm \u0026 5 PCS","offer_id":52446691197202,"sku":"GYJLTBJT02380x5","price":42.01,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6.35 mm \u0026 5 PCS","offer_id":52446691229970,"sku":"GYJLTBJT02385x5","price":42.01,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 8 mm \u0026 5 PCS","offer_id":52446691262738,"sku":"GYJLTBJT02381x5","price":42.01,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 10 mm \u0026 5 PCS","offer_id":52446691295506,"sku":"GYJLTBJT02383x5","price":42.01,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 12 mm \u0026 5 PCS","offer_id":52446691328274,"sku":"GYJLTBJT02384x5","price":42.01,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 5 mm \u0026 10 PCS","offer_id":52446691361042,"sku":"GYJLTBJT02382x10","price":81.94,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6 mm \u0026 10 PCS","offer_id":52446691393810,"sku":"GYJLTBJT02380x10","price":81.94,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 6.35 mm \u0026 10 PCS","offer_id":52446691426578,"sku":"GYJLTBJT02385x10","price":81.94,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 8 mm \u0026 10 PCS","offer_id":52446691459346,"sku":"GYJLTBJT02381x10","price":81.94,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 10 mm \u0026 10 PCS","offer_id":52446691492114,"sku":"GYJLTBJT02383x10","price":81.94,"currency_code":"USD","in_stock":true},{"title":"40 Tooth \/ 10 mm \/ 12 mm \u0026 10 PCS","offer_id":52446691524882,"sku":"GYJLTBJT02384x10","price":81.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-03_7cbef7d7-a355-4096-b260-95e0deeef02e.jpg?v=1784085733","url":"https:\/\/homediyer.com\/products\/gt2-40-tooth-timing-belt-pulley-10mm-width","provider":"HomeDIYer","version":"1.0","type":"link"}