{"product_id":"5m-k-type-timing-belt-pulleys-10-14t-bore-4-12mm","title":"5M Pulley 10~ 14T K-type Timing Belt Pulleys Bore=4~12 mm Tooth width=11~21 mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e5M K-Type Timing Belt Pulleys — Precision Synchronous Drive Components for CNC \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or mismatched pulley causes positioning errors in your CNC router, 3D printer, or conveyor system, the entire build suffers. These 5M pitch K-type timing belt pulleys are engineered for makers, machine builders, and automation engineers who need repeatable, slip-free synchronous motion without the guesswork of sourcing mismatched components.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy with a natural silver finish. The 5M series features a 5 mm pitch profile compatible with standard 5M open-end and closed-loop timing belts. Tooth count ranges from 10 T to 14 T, tooth (belt) width options span 11 mm, 16 mm, and 21 mm (~0.43 in, 0.63 in, 0.83 in), and bore diameters cover 4 mm, 5 mm, 6 mm, 6.35 mm, 8 mm, 10 mm, and 12 mm. Optional K-type keyway widths of 3 mm or 4 mm are available on select bore sizes for positive shaft locking.\u003c\/p\u003e\n\u003cp\u003eTypical applications include desktop CNC milling machines requiring 5M synchronous belt drives, DIY laser engravers and plasma cutters needing precise X\/Y axis motion, and light-duty conveyor or pick-and-place automation systems where consistent tooth engagement and low backlash are 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 standard \u003cstrong\u003e5M pitch timing belts\u003c\/strong\u003e (5 mm tooth pitch). Verify belt width matches your selected tooth width variant (11 mm, 16 mm, or 21 mm) before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 5M K-Type Timing Belt Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eMultiple Tooth Count Options (10 T – 14 T)\u003c\/strong\u003e\n\u003cp\u003eChoose from 10, 12, 13, or 14 teeth to dial in your drive ratio. Fewer teeth increase speed; more teeth increase torque — select the count that matches your axis load and speed requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eWide Bore Range: 4 mm to 12 mm\u003c\/strong\u003e\n\u003cp\u003eCompatible with common motor shaft diameters from 4 mm up to 12 mm, covering NEMA 17, NEMA 23, and many servo motor output shafts used in CNC and robotics builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔑\u003c\/span\u003e \u003cstrong\u003eOptional K-Type Keyway for Positive Shaft Lock\u003c\/strong\u003e\n\u003cp\u003eSelect variants include a 3 mm or 4 mm keyway slot machined to K-type tolerance, preventing rotational slip under load — essential for high-torque or reversing-direction applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eThree Tooth Width Options: 11 mm, 16 mm, 21 mm\u003c\/strong\u003e\n\u003cp\u003eMatch the pulley tooth width to your belt width for full tooth engagement. Wider belts carry more load; narrower belts suit compact, lightweight axis designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e \u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from aluminum alloy for a balance of light weight and structural rigidity. Suitable for indoor automation environments and typical CNC duty cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eSingle or 2-Piece Pack Options\u003c\/strong\u003e\n\u003cp\u003eOrder as a single pulley for replacement or prototyping, or select the 2-piece pack for dual-axis builds or to keep a spare on hand — both options available across most variants.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 5M K-Type Timing Belt Pulleys\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Pitch\u003c\/th\u003e\n\u003ctd\u003e5M (5 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e10 T, 12 T, 13 T, 14 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Width Options\u003c\/th\u003e\n\u003ctd\u003e11 mm \/ 16 mm \/ 21 mm (approx. 0.43\" \/ 0.63\" \/ 0.83\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Options\u003c\/th\u003e\n\u003ctd\u003e4 mm \/ 5 mm \/ 6 mm \/ 6.35 mm \/ 8 mm \/ 10 mm \/ 12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Options\u003c\/th\u003e\n\u003ctd\u003eWithout keyway \/ 3 mm keyway \/ 4 mm keyway (K-type)\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)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e1 pc or 2 pcs (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Belt Type\u003c\/th\u003e\n\u003ctd\u003e5M open-end or closed-loop timing belt\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\u003eThe tooth count determines your drive ratio. A 10-tooth pulley paired with a 20-tooth pulley gives a 2:1 reduction (more torque, less speed). For direct-drive or 1:1 setups, use matching tooth counts on both the motor and idler\/driven shaft. For CNC routers and 3D printers, 10 T–14 T pulleys are common on the motor side when paired with longer-tooth driven pulleys or lead screws.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat tooth width should I select — 11 mm, 16 mm, or 21 mm?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth width must match your timing belt width. A 11 mm pulley is used with an 11 mm wide 5M belt, a 16 mm pulley with a 16 mm belt, and so on. Using a narrower pulley than your belt will cause the belt to overhang and wear unevenly. When in doubt, measure your existing belt width or check your machine's BOM.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need the keyway version, or is the set-screw version sufficient?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor light-duty, low-torque, or unidirectional applications (such as most 3D printer axes), a set-screw bore without a keyway is typically sufficient. For higher-torque applications, reversing loads, or where positional accuracy is critical (CNC milling, plasma cutting), the K-type keyway provides a positive mechanical lock that prevents rotational slip even under shock loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this pulley compatible with my NEMA 17 or NEMA 23 stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNEMA 17 motors typically have a 5 mm output shaft — select the 5 mm bore variant. NEMA 23 motors commonly use 6.35 mm (1\/4\") or 8 mm shafts — select the matching bore. Always verify your motor's shaft diameter in its datasheet before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow corrosion-resistant is the aluminum alloy material?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum alloy offers good natural oxidation resistance for indoor, dry environments typical of CNC workshops and electronics labs. For outdoor or high-humidity environments, consider applying a light coat of machine oil or selecting a pulley with an anodized finish. These pulleys are not rated for submersion or continuous exposure to corrosive chemicals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys with a GT2 or HTD belt instead of a 5M belt?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. These pulleys are designed specifically for the 5M trapezoidal tooth profile with a 5 mm pitch. GT2 belts use a 2 mm pitch curvilinear profile, and HTD belts use a rounded tooth profile — neither is interchangeable with 5M. Using mismatched belt-pulley profiles will cause skipping, accelerated wear, and loss of synchronization.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the 1-piece and 2-piece quantity options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe quantity option lets you order either 1 pulley or a pack of 2 pulleys of the same specification. The 2-piece option is useful when building dual-axis machines (e.g., a CoreXY 3D printer or dual-motor gantry), or when you want to keep a spare on hand. The per-unit price is reflected in the listed variant price.\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, Bore Diameter, and Keyway option above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"5M * 10 T \u0026 11 mm \/ 4 mm \/ without keyway \u0026 1","offer_id":52444806840594,"sku":"WXB5M10TC11D4KFx1","price":7.0,"currency_code":"USD","in_stock":true},{"title":"5M * 10 T \u0026 11 mm \/ 4 mm \/ without keyway \u0026 2","offer_id":52444806873362,"sku":"WXB5M10TC11D4KFx2","price":11.14,"currency_code":"USD","in_stock":true},{"title":"5M * 10 T \u0026 11 mm \/ 5 mm \/ without keyway \u0026 1","offer_id":52444806906130,"sku":"WXB5M10TC11D5KFx1","price":7.0,"currency_code":"USD","in_stock":true},{"title":"5M * 10 T \u0026 11 mm \/ 5 mm \/ without keyway \u0026 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