{"product_id":"3m-timing-belt-pulley-af-type-40-45-48t-15mm-belt","title":"3M Timing Belt Pulley AF-Type 40\/45\/48T Bore:5mm-25mm Applicable Belt Width:15mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e3M Timing Belt Pulley AF-Type — Precise Synchronous Drive for Compact Motion Systems\u003c\/h2\u003e\n\u003cp\u003eWhen your CNC router, 3D printer, or automation rig demands slip-free, low-backlash power transmission, a mismatched or worn pulley becomes the weakest link in the entire drive train. Engineers and makers who work with 3M pitch synchronous belts need a pulley that holds tight tolerances on tooth profile and bore concentricity — every time. These 3M Timing Belt Pulleys in AF-Type configuration are designed for exactly that demand.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy, offering a balance of light weight and structural rigidity. The AF-Type flange design keeps the belt tracking reliably on the pulley face. Available in three tooth counts — 40T, 45T, and 48T — with bore diameters ranging from 5 mm (0.20 in) to 25 mm (0.98 in), and a fixed applicable belt width of 15 mm (0.59 in). Keyway bore options (e.g., 8mm 3×1.4mm, 10mm 4×1.8mm, 12mm 5×2.3mm) are available for shaft-locking applications.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include desktop CNC milling machines requiring 3M synchronous drive pulleys with AF-type flanges, RepRap-style 3D printers upgrading to wider 15mm belt systems, and light industrial conveyor or indexing table builds where a 40-tooth or 48-tooth 3M pulley with a specific bore-to-shaft fit is critical.\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 3M pitch synchronous timing belts with 15 mm width. Verify your belt pitch (3 mm tooth-to-tooth), belt width (15 mm), and shaft diameter before ordering. AF-Type flanges are fixed; confirm flange clearance in your housing.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 3M AF-Type Timing Belt Pulleys\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eThree Tooth Count Options\u003c\/strong\u003e — 40T, 45T, and 48T available; select the ratio that matches your drive speed and torque requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Bore Range\u003c\/strong\u003e — Bore diameters from 5 mm to 25 mm (0.20–0.98 in) cover most standard motor and shaft sizes; keyway bores also available.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\u003cstrong\u003eAF-Type Flange Design\u003c\/strong\u003e — Integrated flanges on both sides of the pulley face keep the 15 mm belt centered and prevent lateral drift during operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e — Lightweight yet rigid material reduces rotational inertia, suitable for high-cycle motion control applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003e3M Pitch Tooth Profile\u003c\/strong\u003e — Tooth geometry machined to 3 mm pitch specification for accurate meshing with standard 3M synchronous belts, minimizing backlash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eKeyway Bore Variants Available\u003c\/strong\u003e — Select bore options include keyway cuts (e.g., 3×1.4 mm, 4×1.8 mm, 5×2.3 mm) for positive shaft engagement without set-screw slip.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 3M AF-Type Timing Belt Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Pitch\u003c\/th\u003e\n\u003ctd\u003e3M (3 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePulley Type\u003c\/th\u003e\n\u003ctd\u003eAF-Type (double-flanged)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e40T \/ 45T \/ 48T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplicable Belt Width\u003c\/th\u003e\n\u003ctd\u003e15 mm (0.59 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e5 mm – 25 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Bore Options\u003c\/th\u003e\n\u003ctd\u003e8mm (3×1.4mm), 10mm (4×1.8mm), 12mm (4×1.8mm \/ 5×2.3mm), 12.7mm (5×2.3mm), 14mm (5×2.3mm), 15mm (5×2.3mm), 19mm (5×2.3mm)\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\u003eFlange Configuration\u003c\/th\u003e\n\u003ctd\u003eDouble-flanged (AF-Type)\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\u003ctr\u003e\n\u003cth\u003eSurface Finish\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 between 40T, 45T, and 48T?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth count determines your drive ratio and pitch diameter. A 40T pulley has a smaller pitch diameter than a 48T, so it produces a higher belt speed for the same shaft RPM when paired with a smaller driven pulley. Choose 40T for compact, faster-moving axes; 45T or 48T for slightly larger pitch diameters or when you need a specific gear ratio with your driven pulley. Calculate pitch diameter as: PD = (Teeth × Pitch) ÷ π.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size should I select for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your motor or drive shaft diameter precisely with calipers. Select the bore that matches your shaft — a bore that is too large will cause runout and vibration. For shafts requiring positive locking, choose a keyway bore variant (e.g., 8mm 3×1.4mm) that matches your shaft's keyway dimensions. Standard round bores are typically secured with a set screw.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this pulley compatible with any 3M timing belt, or only specific brands?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese pulleys are machined to the standard 3M pitch tooth profile (3 mm pitch, trapezoidal tooth form), so they are compatible with any 3M synchronous timing belt from any manufacturer that conforms to the 3M standard. Confirm your belt is 15 mm wide to match the applicable belt width of this pulley.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill the aluminum construction handle my application's load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum alloy pulleys are well-suited for light-to-medium duty motion control applications such as 3D printers, CNC routers, laser cutters, and small conveyor systems. For heavy industrial loads with high shock or continuous high-torque operation, contact us to confirm suitability. The AF-type flanges add lateral belt retention, which reduces edge wear under moderate side loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the AF-Type flange prevent belt derailment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The AF-Type designation means the pulley has flanges on both sides of the belt contact face. These flanges act as guides that keep the 15 mm belt centered on the pulley, preventing it from walking off the edge during operation — particularly important in vertical or angled drive configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I verify the keyway dimensions match my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eKeyway dimensions are listed in the variant name in the format: bore diameter (key width × key depth), e.g., \"12mm (5×2.3mm)\" means a 12 mm bore with a 5 mm wide × 2.3 mm deep keyway. Measure your shaft's keyway with a caliper or refer to your motor's datasheet. The key and keyway must match for a proper interference-free fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this pulley on both the drive and driven side of a belt system?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These pulleys can be used on either the driving (motor) shaft or the driven (load) shaft. When used as a pair, the ratio of teeth between the two pulleys determines your speed and torque multiplication. Ensure both pulleys share the same 3M pitch and that the belt width matches the 15 mm specification of both pulleys.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your 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":"AF-Type \/ 40T \/ 5mm \u0026 15mm","offer_id":52444110094610,"sku":"GLFBBYWGLBZSJ068302x1","price":17.35,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 6mm \u0026 15mm","offer_id":52444110127378,"sku":"GLFBBYWGLBZSJ068303x1","price":16.86,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 6.35mm \u0026 15mm","offer_id":52444110160146,"sku":"GLFBBYWGLBZSJ068304x1","price":16.86,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 8mm \u0026 15mm","offer_id":52444110192914,"sku":"GLFBBYWGLBZSJ068305x1","price":16.86,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 10mm \u0026 15mm","offer_id":52444110225682,"sku":"GLFBBYWGLBZSJ068306x1","price":16.86,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 12mm \u0026 15mm","offer_id":52444110258450,"sku":"GLFBBYWGLBZSJ068307x1","price":16.86,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 12.7mm \u0026 15mm","offer_id":52444110291218,"sku":"GLFBBYWGLBZSJ068308x1","price":16.86,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 14mm \u0026 15mm","offer_id":52444110323986,"sku":"GLFBBYWGLBZSJ068309x1","price":17.35,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 15mm \u0026 15mm","offer_id":52444110356754,"sku":"GLFBBYWGLBZSJ068310x1","price":17.35,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 16mm \u0026 15mm","offer_id":52444110389522,"sku":"GLFBBYWGLBZSJ068311x1","price":17.35,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 17mm \u0026 15mm","offer_id":52444110422290,"sku":"GLFBBYWGLBZSJ068312x1","price":17.35,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 19mm \u0026 15mm","offer_id":52444110455058,"sku":"GLFBBYWGLBZSJ068313x1","price":17.35,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 20mm \u0026 15mm","offer_id":52444110487826,"sku":"GLFBBYWGLBZSJ068314x1","price":17.35,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 8mm(3x1.4mm) \u0026 15mm","offer_id":52444110520594,"sku":"GLFBBYWGLBZSJ068315x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 10mm(4x1.8mm) \u0026 15mm","offer_id":52444110553362,"sku":"GLFBBYWGLBZSJ068316x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 12mm(4x1.8mm) \u0026 15mm","offer_id":52444110586130,"sku":"GLFBBYWGLBZSJ068317x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 12mm(5x2.3mm) \u0026 15mm","offer_id":52444110618898,"sku":"GLFBBYWGLBZSJ068318x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 12.7mm(5x2.3mm) \u0026 15mm","offer_id":52444110651666,"sku":"GLFBBYWGLBZSJ068319x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 14mm(5x2.3mm) \u0026 15mm","offer_id":52444110684434,"sku":"GLFBBYWGLBZSJ068320x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 40T \/ 15mm(5x2.3mm) \u0026 15mm","offer_id":52444110717202,"sku":"GLFBBYWGLBZSJ068321x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 5mm \u0026 15mm","offer_id":52444110749970,"sku":"GLFBBYWGLBZSJ068322x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 6mm \u0026 15mm","offer_id":52444110782738,"sku":"GLFBBYWGLBZSJ068323x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 6.35mm \u0026 15mm","offer_id":52444110815506,"sku":"GLFBBYWGLBZSJ068324x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 8mm \u0026 15mm","offer_id":52444110848274,"sku":"GLFBBYWGLBZSJ068325x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 10mm \u0026 15mm","offer_id":52444110881042,"sku":"GLFBBYWGLBZSJ068326x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 12mm \u0026 15mm","offer_id":52444110913810,"sku":"GLFBBYWGLBZSJ068327x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 12.7mm \u0026 15mm","offer_id":52444110946578,"sku":"GLFBBYWGLBZSJ068328x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 15mm \u0026 15mm","offer_id":52444110979346,"sku":"GLFBBYWGLBZSJ068329x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 16mm \u0026 15mm","offer_id":52444111012114,"sku":"GLFBBYWGLBZSJ068330x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 17mm \u0026 15mm","offer_id":52444111044882,"sku":"GLFBBYWGLBZSJ068331x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 19mm \u0026 15mm","offer_id":52444111077650,"sku":"GLFBBYWGLBZSJ068332x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 20mm \u0026 15mm","offer_id":52444111110418,"sku":"GLFBBYWGLBZSJ068333x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 12mm(5x2.3mm) \u0026 15mm","offer_id":52444111143186,"sku":"GLFBBYWGLBZSJ068334x1","price":20.29,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 12.7mm(5x2.3mm) \u0026 15mm","offer_id":52444111175954,"sku":"GLFBBYWGLBZSJ068335x1","price":20.29,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 14mm(5x2.3mm) \u0026 15mm","offer_id":52444111208722,"sku":"GLFBBYWGLBZSJ068336x1","price":20.29,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 15mm(5x2.3mm) \u0026 15mm","offer_id":52444111241490,"sku":"GLFBBYWGLBZSJ068337x1","price":20.29,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 45T \/ 19mm(5x2.3mm) \u0026 15mm","offer_id":52444111274258,"sku":"GLFBBYWGLBZSJ068338x1","price":20.29,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 5mm \u0026 15mm","offer_id":52444111307026,"sku":"GLFBBYWGLBZSJ068339x1","price":20.45,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 6mm \u0026 15mm","offer_id":52444111339794,"sku":"GLFBBYWGLBZSJ068340x1","price":19.2,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 6.35mm \u0026 15mm","offer_id":52444111372562,"sku":"GLFBBYWGLBZSJ068341x1","price":19.2,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 8mm \u0026 15mm","offer_id":52444111405330,"sku":"GLFBBYWGLBZSJ068342x1","price":19.2,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 10mm \u0026 15mm","offer_id":52444111438098,"sku":"GLFBBYWGLBZSJ068343x1","price":19.2,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 12mm \u0026 15mm","offer_id":52444111470866,"sku":"GLFBBYWGLBZSJ068344x1","price":19.2,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 12.7mm \u0026 15mm","offer_id":52444111503634,"sku":"GLFBBYWGLBZSJ068345x1","price":19.2,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 14mm \u0026 15mm","offer_id":52444111536402,"sku":"GLFBBYWGLBZSJ068346x1","price":20.45,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 15mm \u0026 15mm","offer_id":52444111569170,"sku":"GLFBBYWGLBZSJ068347x1","price":20.45,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 16mm \u0026 15mm","offer_id":52444111601938,"sku":"GLFBBYWGLBZSJ068348x1","price":20.45,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 17mm \u0026 15mm","offer_id":52444111634706,"sku":"GLFBBYWGLBZSJ068349x1","price":20.45,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 19mm \u0026 15mm","offer_id":52444111667474,"sku":"GLFBBYWGLBZSJ068350x1","price":20.45,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 20mm \u0026 15mm","offer_id":52444111700242,"sku":"GLFBBYWGLBZSJ068351x1","price":20.45,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 22mm \u0026 15mm","offer_id":52444111733010,"sku":"GLFBBYWGLBZSJ068352x1","price":21.11,"currency_code":"USD","in_stock":true},{"title":"AF-Type \/ 48T \/ 25mm \u0026 15mm","offer_id":52444111765778,"sku":"GLFBBYWGLBZSJ068353x1","price":21.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-04_25bbb1a9-cff6-4523-8ca7-6b8f4f98e160.jpg?v=1783312194","url":"https:\/\/homediyer.com\/products\/3m-timing-belt-pulley-af-type-40-45-48t-15mm-belt","provider":"HomeDIYer","version":"1.0","type":"link"}