{"product_id":"gt2-timing-belt-pulley-bf-type-30-60-teeth-bore-5-12mm-6mm-belt","title":"GT2 Timing Belt Pulley BF-Type 30-60 Teeth Bore 5-12mm For 6mm Wide Timing Belt","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGT2 Timing Belt Pulley BF-Type — Precise Motion Control for 6mm GT2 Belts\u003c\/h2\u003e\n\u003cp\u003eWhen your 3D printer skips steps or your CNC axis loses position, the culprit is often a poorly fitted pulley. Engineers, makers, and automation builders who demand repeatable, backlash-free motion need a GT2 timing belt pulley BF-type that fits exactly right — every time. This listing covers the full range of BF-type (flanged, no-teeth-on-hub) pulleys designed specifically for 6mm wide GT2 timing belts.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy with a natural anodized or silver finish, featuring a flanged body to keep the belt tracking true. Tooth counts range from 30T to 60T, and bore diameters span 5mm to 12mm (approximately 0.197\" to 0.472\"), accommodating the most common motor shaft sizes used in desktop motion systems. Set-screw retention is included to lock the pulley securely onto the shaft.\u003c\/p\u003e\n\u003cp\u003eTypical applications include FDM 3D printer X\/Y axis drives (GT2 belt-driven CoreXY and Cartesian systems), desktop CNC router feed axes, laser engraver gantry drives, and lightweight robotic arm joints requiring low-backlash GT2 belt transmission.\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 Designed for 6mm wide GT2 (2mm pitch) open-loop or closed-loop timing belts. Verify your motor shaft diameter before selecting a bore size. BF-type pulleys are non-toothed on the hub face — confirm your application does not require a toothed hub (B-type).\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 class=\"hdiy-icon\"\u003e🦷\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e30–60 Tooth Range\u003c\/strong\u003e\u003cbr\u003eCover a wide gear-ratio spectrum — from the compact 30T for high-speed, low-torque runs to the 60T for torque-multiplying, slower-speed drives. Select the tooth count that matches your motion profile.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMulti-Bore Options (5–12mm)\u003c\/strong\u003e\u003cbr\u003eBore sizes of 5mm, 6mm, 6.35mm, 7mm, 8mm, 10mm, and 12mm cover NEMA 17, NEMA 23, and common servo motor shaft diameters without requiring custom machining.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🏗️\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e\u003cbr\u003eLightweight yet rigid aluminum body keeps rotational inertia low while maintaining dimensional stability under continuous cyclic loading — critical for high-cycle 3D printing and CNC applications.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBF-Type Flanged Design\u003c\/strong\u003e\u003cbr\u003eIntegrated flanges on both sides of the pulley body prevent lateral belt walk, eliminating the need for separate belt guides and reducing assembly complexity.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔐\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSet-Screw Shaft Lock\u003c\/strong\u003e\u003cbr\u003eIncludes one or two M3 set screws (depending on variant) for positive shaft retention. Pair with a flat on the motor shaft for maximum torque transfer without slippage.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGT2 2mm Pitch Tooth Profile\u003c\/strong\u003e\u003cbr\u003eConforms to the GT2 (Gates Tooth 2) profile standard, ensuring smooth, low-noise meshing with GT2 belts and minimizing tooth jump under load.\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\u003eBelt Type\u003c\/th\u003e\n\u003ctd\u003eGT2 (2mm pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width Compatibility\u003c\/th\u003e\n\u003ctd\u003e6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePulley Type\u003c\/th\u003e\n\u003ctd\u003eBF-Type (Flanged, smooth hub face)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e30T, 36T, 40T, 48T, 60T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Options\u003c\/th\u003e\n\u003ctd\u003e5mm, 6mm, 6.35mm, 7mm, 8mm, 10mm, 12mm\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 Retention\u003c\/th\u003e\n\u003ctd\u003eM3 set screw(s)\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\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 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. A 30T pulley paired with a 60T pulley gives a 2:1 reduction, halving speed and doubling torque. For most 3D printer X\/Y axes, 20T–40T pulleys are standard. If you are replacing an existing pulley, match the tooth count exactly to maintain your steps-per-mm calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size fits 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. Select the 5mm bore variant. Some NEMA 17 motors with a D-shaft flat will benefit from a set-screw lock against the flat for zero-slip performance. NEMA 23 motors typically use an 8mm or 6.35mm (1\/4\") shaft — select accordingly.\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. BF-type GT2 pulleys are compatible with both open-loop GT2 timing belts and closed-loop GT2 belt loops, provided the belt width is 6mm and the pitch is 2mm. Confirm the inner circumference of your closed-loop belt matches the pulley tooth count and center distance of your system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between BF-type and B-type pulleys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBF-type pulleys have a smooth (non-toothed) hub face with flanges on both sides of the toothed section. B-type pulleys have a toothed hub face. BF-type is the most common choice for standard belt-drive motion systems where the belt wraps around the toothed section only. If your design requires teeth on the hub face for a specific engagement geometry, you would need a B-type pulley instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill aluminum pulleys corrode or wear out quickly?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum alloy pulleys with an anodized finish offer good corrosion resistance in typical indoor workshop and machine environments. For high-humidity or outdoor applications, periodic inspection is recommended. The GT2 tooth profile distributes belt load evenly across multiple teeth, which significantly reduces localized wear compared to V-belt or flat-belt systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I install the set screw correctly?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSlide the pulley onto the motor shaft and position it at the correct axial location. Use a 1.5mm or 2mm hex key (Allen key) to tighten the M3 set screw against the shaft. If your shaft has a D-flat, align the set screw with the flat before tightening for maximum torque transfer. Do not overtighten — snug is sufficient to prevent slippage without damaging the shaft.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys for a CoreXY 3D printer build?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. BF-type GT2 pulleys are widely used in CoreXY, HBot, and Cartesian 3D printer builds. For CoreXY systems, 20T pulleys are most common for the driven pulleys, while idler pulleys (smooth bore) handle belt redirection. This listing covers driven pulleys with teeth — confirm your tooth count matches your firmware steps-per-mm setting after installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Model (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":"GT2 - 30T \/ 6mm \/ 8mm","offer_id":52444136702226,"sku":"QTLJBJT00160x1","price":10.04,"currency_code":"USD","in_stock":true},{"title":"GT2 - 60T \/ 6mm \/ 10mm","offer_id":52444136734994,"sku":"QTLJBJT00161x1","price":12.21,"currency_code":"USD","in_stock":true},{"title":"GT2 - 36T \/ 6mm \/ 6.35mm","offer_id":52444136767762,"sku":"QTLJBJT00162x1","price":10.17,"currency_code":"USD","in_stock":true},{"title":"GT2 - 60T \/ 6mm \/ 6.35mm","offer_id":52444136800530,"sku":"QTLJBJT00163x1","price":12.21,"currency_code":"USD","in_stock":true},{"title":"GT2 - 40T \/ 6mm \/ 5mm","offer_id":52444136833298,"sku":"QTLJBJT00164x1","price":11.06,"currency_code":"USD","in_stock":true},{"title":"GT2 - 40T \/ 6mm \/ 8mm","offer_id":52444136866066,"sku":"QTLJBJT00165x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 60T \/ 6mm \/ 7mm","offer_id":52444136898834,"sku":"QTLJBJT00166x1","price":12.21,"currency_code":"USD","in_stock":true},{"title":"GT2 - 60T \/ 6mm \/ 5mm","offer_id":52444136931602,"sku":"QTLJBJT00167x1","price":12.21,"currency_code":"USD","in_stock":true},{"title":"GT2 - 40T \/ 6mm \/ 6mm","offer_id":52444136964370,"sku":"QTLJBJT00168x1","price":11.06,"currency_code":"USD","in_stock":true},{"title":"GT2 - 30T \/ 6mm \/ 6mm","offer_id":52444136997138,"sku":"QTLJBJT00169x1","price":10.04,"currency_code":"USD","in_stock":true},{"title":"GT2 - 30T \/ 6mm \/ 5mm","offer_id":52444137029906,"sku":"QTLJBJT00170x1","price":9.7,"currency_code":"USD","in_stock":true},{"title":"GT2 - 40T \/ 6mm \/ 6.35mm","offer_id":52444137062674,"sku":"QTLJBJT00171x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 48T \/ 6mm \/ 12mm","offer_id":52444137095442,"sku":"QTLJBJT00172x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 40T \/ 6mm \/ 12mm","offer_id":52444137128210,"sku":"QTLJBJT00173x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 48T \/ 6mm \/ 10mm","offer_id":52444137160978,"sku":"QTLJBJT00174x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 36T \/ 6mm \/ 5mm","offer_id":52444137193746,"sku":"QTLJBJT00175x1","price":10.17,"currency_code":"USD","in_stock":true},{"title":"GT2 - 48T \/ 6mm \/ 8mm","offer_id":52444137226514,"sku":"QTLJBJT00176x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 40T \/ 6mm \/ 10mm","offer_id":52444137259282,"sku":"QTLJBJT00177x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 60T \/ 6mm \/ 8mm","offer_id":52444137292050,"sku":"QTLJBJT00178x1","price":12.21,"currency_code":"USD","in_stock":true},{"title":"GT2 - 48T \/ 6mm \/ 6.35mm","offer_id":52444137324818,"sku":"QTLJBJT00179x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 48T \/ 6mm \/ 6mm","offer_id":52444137357586,"sku":"QTLJBJT00180x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 36T \/ 6mm \/ 8mm","offer_id":52444137390354,"sku":"QTLJBJT00181x1","price":10.17,"currency_code":"USD","in_stock":true},{"title":"GT2 - 48T \/ 6mm \/ 5mm","offer_id":52444137423122,"sku":"QTLJBJT00182x1","price":11.19,"currency_code":"USD","in_stock":true},{"title":"GT2 - 36T \/ 6mm \/ 10mm","offer_id":52444137455890,"sku":"QTLJBJT00183x1","price":12.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-05_a4231bb9-465f-4f35-8d58-8271444deeda.jpg?v=1783314329","url":"https:\/\/homediyer.com\/products\/gt2-timing-belt-pulley-bf-type-30-60-teeth-bore-5-12mm-6mm-belt","provider":"HomeDIYer","version":"1.0","type":"link"}