{"product_id":"3m-timing-belt-drive-pulley-bf-type-pitch-3mm-for-cnc-step-motor-15-100-teeth","title":"3M Timing Belt Drive Pulley BF-Type Pitch 3mm For CNC Step Motor 15~100 Teeth","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e3M BF-Type Timing Belt Drive Pulley — Precision 3mm Pitch for CNC \u0026amp; Stepper Motor Drives\u003c\/h2\u003e\n\u003cp\u003eWhen belt slip or misalignment is costing you accuracy on your CNC router, 3D printer, or motion-control rig, the root cause is often an undersized or poorly toleranced pulley. These 3M BF-Type timing belt drive pulleys are engineered for makers, machine builders, and automation engineers who need repeatable, slip-free power transmission without the guesswork of sourcing industrial surplus.\u003c\/p\u003e\n\u003cp\u003eEach 3M timing belt drive pulley features a 3mm pitch (distance between tooth centers), a BF-Type flange profile, and a 10mm belt slot width. Tooth counts span 15T through 100T, covering a wide range of reduction ratios. The bore diameter varies by tooth count — select your variant above to confirm the bore size for your shaft. Overall pulley diameter scales proportionally with tooth count, ranging from approximately 14mm (0.55 in) for 15T up to approximately 95mm (3.74 in) for 100T.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CNC router X\/Y axis drives requiring 3M GT2-compatible belt systems, stepper motor pulley replacements on laser engravers and plasma tables, and custom gantry or conveyor builds where a specific tooth count is needed to hit a target linear speed or torque ratio.\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 (3mm tooth spacing) synchronous timing belts with 10mm width. Verify your belt profile (3M \/ GT2-3M) and bore diameter against your shaft before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 3M BF-Type Timing Belt Drive Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eBF-Type Flanged Profile\u003c\/strong\u003e — Dual-flange design keeps the belt tracking on-center under load, reducing lateral drift on long-span drives.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e3mm Pitch Tooth Geometry\u003c\/strong\u003e — Matches standard 3M synchronous belts for positive, slip-free engagement across the full 15T–100T tooth range.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eWide Tooth Count Selection\u003c\/strong\u003e — 38 variants from 15T to 100T let you dial in your exact drive ratio without custom machining.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔧\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e10mm Slot Width\u003c\/strong\u003e — Consistent 10mm belt slot across all variants simplifies belt sourcing and system design.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚖️\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eMachined Bore \u0026amp; Set Screw\u003c\/strong\u003e — Each pulley includes a machined bore sized to the tooth count and a set screw flat for secure shaft mounting. See variant options for bore diameter.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🏭\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eBroad Application Range\u003c\/strong\u003e — Suited for CNC routers, laser engravers, stepper motor drives, conveyor systems, and DIY automation projects requiring 3M belt compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 3M BF-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\u003e3mm (3M)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePulley Type\u003c\/th\u003e\n\u003ctd\u003eBF-Type (flanged)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e15T – 100T (38 variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Slot Width\u003c\/th\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter Range\u003c\/th\u003e\n\u003ctd\u003eApprox. 14mm – 95mm (0.55 in – 3.74 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eSet screw with flat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Belt Profile\u003c\/th\u003e\n\u003ctd\u003e3M synchronous timing belt (10mm width)\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\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 drive system?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth count determines your drive ratio. Divide the driven pulley teeth by the drive pulley teeth to get the reduction ratio. For example, a 20T drive pulley paired with a 40T driven pulley gives a 2:1 reduction — halving speed and doubling torque. Use a smaller tooth count on the motor shaft for speed reduction, or match tooth counts for a 1:1 direct drive.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat belt profile is compatible with these pulleys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese pulleys are designed for 3M pitch synchronous timing belts — belts with a 3mm tooth-to-tooth spacing and 10mm width. Many GT2-3M belts are dimensionally compatible, but confirm your belt's tooth profile matches the 3M standard before ordering. Standard GT2 (2mm pitch) belts are \u003cem\u003enot\u003c\/em\u003e compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I confirm the bore diameter fits my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBore diameter varies by tooth count. Select your specific tooth count variant on this page to see the bore size listed in the variant details. Common stepper motor shaft diameters are 5mm, 6.35mm (1\/4 in), and 8mm — measure your shaft with calipers before ordering to ensure a proper fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys strong enough for high-torque CNC applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese pulleys are machined to handle the torque loads typical of NEMA 17 and NEMA 23 stepper motor drives used in CNC routers, laser engravers, and similar machines. For very high-torque servo-driven systems, confirm the material specification of your selected variant and consult your system's torque requirements against the pulley's rated load capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill the flanges keep the belt from slipping off?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The BF-Type designation means the pulley has flanges on both sides of the belt groove. These flanges act as lateral guides, preventing the belt from walking off the pulley during operation — particularly important on long-span or high-speed drives where belt tracking can be an issue.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys corrosion-resistant for use in humid or outdoor environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCorrosion resistance depends on the material and finish of the specific variant. Check the variant details for material information. For humid or outdoor environments, consider selecting an anodized aluminum or stainless variant if available, and apply a light machine oil to the bore and set screw area after installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys with a servo motor instead of a stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, provided the bore diameter matches your servo shaft and the pulley's load rating suits your servo's output torque. The 3M belt system is used in both stepper and servo-driven motion control applications. Verify shaft diameter, keyway requirements (if any), and torque load before finalizing your selection.\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 (Numbers Of Teeth) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"BF-Type \/ 3M 15T \/ 10mm","offer_id":52445147627794,"sku":"GLFBBYWGLBZSJ069019x1","price":9.18,"currency_code":"USD","in_stock":true},{"title":"BF-Type \/ 3M 16T \/ 10mm","offer_id":52445147660562,"sku":"GLFBBYWGLBZSJ069020x1","price":9.29,"currency_code":"USD","in_stock":true},{"title":"BF-Type \/ 3M 17T \/ 10mm","offer_id":52445147693330,"sku":"GLFBBYWGLBZSJ069021x1","price":9.29,"currency_code":"USD","in_stock":true},{"title":"BF-Type \/ 3M 18T \/ 10mm","offer_id":52445147726098,"sku":"GLFBBYWGLBZSJ069022x1","price":9.18,"currency_code":"USD","in_stock":true},{"title":"BF-Type \/ 3M 19T \/ 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