{"product_id":"htd-5m-80t-120t-timing-belt-pulley-pitch-5mm-with-keyway-drive-pulley-width-16mm","title":"HTD-5M 80T-120T Timing Belt Pulley Pitch 5mm With Keyway Drive Pulley Width 16mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eHTD-5M Timing Belt Pulley with Keyway — Precision Synchronous Drive for CNC \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eEngineers and builders working on CNC routers, 3D printers, and robotic actuators know the frustration of slipping or misaligned drive pulleys that throw off positioning accuracy. These HTD-5M timing belt pulleys with keyway are designed for makers, machine builders, and automation integrators who need a reliable, zero-slip synchronous drive component that installs securely and stays put under load.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy with an anodized finish, featuring an HTD-5M tooth profile (5mm pitch) and a 16mm belt width. Bore sizes range from 10mm to 25mm (approx. 0.39\" to 0.98\"), with tooth counts of 80T, 90T, 100T, and 120T. A precision-cut keyway and set-screw bore ensure positive shaft engagement with no rotational slip.\u003c\/p\u003e\n\u003cp\u003eTypical applications include CNC axis drives requiring HTD-5M 80T pulley ratios, robotic arm joint synchronization using a 5mm pitch timing pulley with keyway, and small-batch automation conveyor drives where a 16mm wide timing pulley provides the right belt contact width for torque transmission.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e Compatible with standard \u003cstrong\u003eHTD-5M timing belts\u003c\/strong\u003e (5mm pitch, 16mm width). Verify shaft diameter and keyway dimensions against your variant selection before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These HTD-5M 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\u003ePrecision Keyway \u0026amp; Set-Screw Bore\u003c\/strong\u003e\n\u003cp\u003eEach pulley includes a machined keyway (3×1.4mm up to 8×3.3mm depending on bore) for positive shaft locking — eliminates rotational slip under dynamic loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eHTD-5M Tooth Profile, 5mm Pitch\u003c\/strong\u003e\n\u003cp\u003eThe rounded HTD tooth form distributes belt load across a larger contact area, reducing tooth shear stress and extending belt life compared to trapezoidal profiles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eWide Tooth Count Range: 80T to 120T\u003c\/strong\u003e\n\u003cp\u003eFour tooth count options (80T, 90T, 100T, 120T) let you dial in the exact drive ratio needed for your CNC axis, conveyor, or robotic joint without custom machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eMultiple Bore Sizes: 10mm to 25mm\u003c\/strong\u003e\n\u003cp\u003eAvailable in 10, 12, 14, 15, 19, 20, and 25mm bore diameters to match common motor and gearbox shaft sizes used in servo, stepper, and BLDC drive systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e \u003cstrong\u003e16mm Belt Width, Aluminum Alloy Body\u003c\/strong\u003e\n\u003cp\u003eThe 16mm face width provides solid belt engagement for moderate torque applications. The aluminum alloy construction keeps rotating mass low while maintaining structural rigidity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eDrop-In Replacement for Standard HTD-5M Systems\u003c\/strong\u003e\n\u003cp\u003eDimensionally compatible with industry-standard HTD-5M belt drives — fits existing belt widths and center distances without redesigning your drive layout.\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 — HTD-5M Timing Belt Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Profile\u003c\/th\u003e\n\u003ctd\u003eHTD-5M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch\u003c\/th\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e80T \/ 90T \/ 100T \/ 120T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e10mm \/ 12mm \/ 14mm \/ 15mm \/ 19mm \/ 20mm \/ 25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Dimensions\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (80T)\u003c\/th\u003e\n\u003ctd\u003eapprox. 127.3mm (5.01\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (90T)\u003c\/th\u003e\n\u003ctd\u003eapprox. 143.2mm (5.64\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (100T)\u003c\/th\u003e\n\u003ctd\u003eapprox. 159.2mm (6.27\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (120T)\u003c\/th\u003e\n\u003ctd\u003eapprox. 190.9mm (7.52\")\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\u003eAnodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlange\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\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 (80T, 90T, 100T, or 120T)?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth count determines the pitch diameter and, combined with your mating pulley's tooth count, sets your drive ratio. A higher tooth count gives a larger pulley diameter and a lower output speed (higher torque) for a given input speed. Calculate your required ratio first, then select the tooth count pair that achieves it within your available center distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I select for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the bore diameter to your motor or gearbox output shaft diameter. Common stepper motor shafts are 5–8mm, servo motors typically run 10–20mm, and larger BLDC or gearbox outputs may be 19–25mm. Always measure your shaft with calipers before ordering. The keyway dimensions are listed per variant — confirm they match your shaft's key specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat keyway sizes are available, and how do I match them to my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eKeyway dimensions are paired with bore size: 3×1.4mm (10mm bore), 4×1.8mm (10–12mm bore), 5×2.3mm (14–15mm bore), 6×2.8mm (19–20mm bore), and 8×3.3mm (25mm bore). These follow standard DIN 6885 key dimensions. Match the keyway width and depth to the key already cut on your shaft, or have a machinist cut a matching key slot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this pulley compatible with my existing HTD-5M timing belt?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — these pulleys are designed for standard HTD-5M timing belts with a 5mm pitch and 16mm width. If your belt is a different width (e.g., 10mm or 20mm), the pulley face width will not match and you should select a pulley with the correct belt width instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the aluminum alloy body — can it handle high-torque applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe aluminum alloy construction is well-suited for light-to-medium torque synchronous drive applications such as CNC routers, 3D printer axes, and small robotic joints. For heavy industrial drives with sustained high torque or shock loads, a steel pulley may be more appropriate. The keyway and set-screw bore provide positive shaft engagement that prevents slippage under normal operating conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill the anodized finish resist corrosion in humid or outdoor environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAnodizing provides a hard oxide layer that significantly improves corrosion resistance compared to bare aluminum. These pulleys are suitable for indoor automation environments and light-duty outdoor use. For prolonged exposure to moisture, salt spray, or aggressive chemicals, additional protective measures or a stainless steel alternative should be considered.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this pulley as both a drive pulley and an idler?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The keyed bore makes it ideal as a driven or driving pulley on a shaft. It can also function as a guided idler if mounted on a bearing-supported shaft, though a flanged idler pulley without a keyway is typically preferred for pure idler applications to reduce unnecessary weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Number of Teeth, Bore, and Keyway \u0026amp; Amount above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"5M80T \/ 10mm \/ 3x1.4mm \u0026 1Pcs","offer_id":52445838803218,"sku":"FXL5M80TC16D10K3AFx1","price":67.25,"currency_code":"USD","in_stock":true},{"title":"5M80T \/ 10mm \/ 4x1.8mm \u0026 1Pcs","offer_id":52445838835986,"sku":"FXL5M80TC16D10K4AFx1","price":67.25,"currency_code":"USD","in_stock":true},{"title":"5M80T \/ 12mm \/ 4x1.8mm \u0026 1Pcs","offer_id":52445838868754,"sku":"FXL5M80TC16D12K4AFx1","price":67.17,"currency_code":"USD","in_stock":true},{"title":"5M80T \/ 15mm 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