{"product_id":"s4-5m-timing-belt-10mm-wide-closed-loop-synchronous-belt","title":"S4.5M Timing Belt 10mm Wide Closed Loop Synchronous Belt for Pulleys — 180mm to 905mm","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eS4.5M Closed Loop Timing Belt 10mm Wide — Precise Synchronous Drive for Pulleys\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or mismatched drive belt throws off your machine's positioning accuracy, the entire project suffers. Whether you're maintaining a 3D printer, building a CNC router, or servicing a light industrial conveyor, this S4.5M closed loop synchronous belt gives you the repeatable, slip-free motion control that hobbyists, makers, and small-shop engineers depend on.\u003c\/p\u003e\n\u003cp\u003eEach belt is a fully closed loop synchronous belt with an S4.5M tooth profile (4.5mm pitch) and a uniform width of 10mm (≈3\/8\"). Available lengths range from 180mm (≈7.1\") to 905mm (≈35.6\"), sold individually (1 pc) or as a pair (2 pcs). The toothed inner surface mates precisely with standard S4.5M pulleys for zero-slip power transmission.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include axis drive systems on desktop CNC machines and laser cutters, feed mechanisms on 3D printers requiring consistent layer positioning, and light-duty conveyor or automation rigs where a synchronous closed loop timing belt for pulleys keeps cycle times consistent.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eConfirm your size before ordering:\u003c\/strong\u003e Measure your existing belt's inner circumference and tooth count, or calculate from your pulley center distance. See the FAQ below for the formula.\u003c\/div\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\u003eS4.5M tooth profile\u003c\/strong\u003e synchronous pulleys. Belt width: \u003cstrong\u003e10mm\u003c\/strong\u003e. Verify your pulley's groove width and tooth profile before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These S4.5M Closed Loop Synchronous Timing Belts\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eS4.5M Tooth Profile\u003c\/strong\u003e — 4.5mm pitch tooth geometry meshes with standard S4.5M pulleys for accurate, repeatable positioning in CNC and automation applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Length Selection\u003c\/strong\u003e — Available in 31 sizes from 180mm (≈7.1\") to 905mm (≈35.6\"), making it straightforward to find a direct replacement closed loop timing belt without custom cutting.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e↔️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eConsistent 10mm Width\u003c\/strong\u003e — Uniform 10mm (≈3\/8\") belt width across all lengths ensures compatibility with standard 10mm-groove S4.5M pulleys and sprockets.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eClosed Loop Construction\u003c\/strong\u003e — Fully joined loop with no splice point means even tension distribution around the drive path, reducing vibration in high-cycle applications like 3D printer axis drives.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔇\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLow-Noise Synchronous Drive\u003c\/strong\u003e — Toothed synchronous design eliminates the slip and squeal of flat or V-belts, keeping operation quieter in workshop and light industrial environments.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛒\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSingle or Pair Quantity Options\u003c\/strong\u003e — Order 1 pc for a single-axis replacement or 2 pcs for dual-axis machines (e.g., CoreXY 3D printers or dual-drive conveyors) in one transaction.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — S4.5M Synchronous Timing Belt\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Type\u003c\/th\u003e\n\u003ctd\u003eClosed Loop Synchronous Timing Belt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eS4.5M (4.5mm pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width\u003c\/th\u003e\n\u003ctd\u003e10mm (≈3\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e180mm (≈7.1\") — 905mm (≈35.6\"); see variant options for all 31 sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoop Type\u003c\/th\u003e\n\u003ctd\u003eFully closed loop (no open ends)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Pulley Profile\u003c\/th\u003e\n\u003ctd\u003eS4.5M synchronous pulleys\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensile Strength\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm for your application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc or 2 pcs (select via Qty option)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003e3D printers, CNC routers, laser engravers, light conveyor systems\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 belt length for my machine?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the inner circumference of your existing belt, or calculate using the center-to-center distance formula: \u003cstrong\u003eBelt Length ≈ 2 × C + π × (D1 + D2) \/ 2\u003c\/strong\u003e, where C is the center distance and D1\/D2 are the pulley pitch diameters. The listed size (e.g., 450mm) is the total inner loop circumference. For reference: 450mm ≈ 17.7\", 180mm ≈ 7.1\", 905mm ≈ 35.6\". When in doubt, go slightly longer — most drives allow tension adjustment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does S4.5M pitch mean, and will it fit my pulley?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eS4.5M means the tooth pitch is 4.5mm — the distance from one tooth center to the next. This belt is designed to mesh with \u003cstrong\u003eS4.5M synchronous pulleys\u003c\/strong\u003e. Check your pulley's label or datasheet for the tooth profile designation. It will not fit GT2, HTD, or other pitch profiles even if the width matches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is this belt — what load or torque can it handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eS4.5M belts at 10mm width are generally suited for light-to-medium power transmission. Typical tensile load capacity for this class is in the range of 200–400 N, though actual ratings vary by material and construction. For applications with specific load requirements, contact us to confirm suitability before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this belt outdoors or in a wet\/oily environment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNeoprene-based synchronous belts are generally resistant to oil splash and incidental moisture. However, they are not typically rated for continuous UV exposure or full submersion. For outdoor or chemically aggressive environments, verify the belt material against your operating conditions, or contact us to confirm compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this a standard replacement belt for 3D printers and CNC machines?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eS4.5M is a less common pitch than GT2 in consumer 3D printers, but it is widely used in industrial CNC equipment, laser systems, and automation machinery. Check your machine's drive specification — if it calls for S4.5M with 10mm width, this belt is typically a direct replacement. If your machine uses GT2 or HTD, this belt will not be compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I convert the belt length from mm to inches?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eDivide the millimeter value by 25.4 to get inches. Quick reference: 180mm ≈ 7.1\", 315mm ≈ 12.4\", 450mm ≈ 17.7\", 630mm ≈ 24.8\", 905mm ≈ 35.6\". All sizes are listed in mm in the variant selector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I order 1 pc or 2 pcs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eOrder \u003cstrong\u003e1 pc\u003c\/strong\u003e if you need a single belt replacement (e.g., one axis on a CNC router or conveyor). Order \u003cstrong\u003e2 pcs\u003c\/strong\u003e if your machine uses two belts of the same length — common in CoreXY 3D printers, dual-drive conveyors, or gantry systems. Buying 2 pcs in one order is generally more cost-effective than two separate orders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003esize and quantity\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"180 mm \/ 1","offer_id":52368165962002,"sku":"WXB180S4.5M10x1","price":11.02,"currency_code":"USD","in_stock":true},{"title":"225 mm \/ 1","offer_id":52368165994770,"sku":"WXB225S4.5M10x1","price":11.02,"currency_code":"USD","in_stock":true},{"title":"252 mm \/ 1","offer_id":52368166027538,"sku":"WXB252S4.5M10x1","price":11.67,"currency_code":"USD","in_stock":true},{"title":"275 mm \/ 1","offer_id":52368166060306,"sku":"WXB275S4.5M10x1","price":12.38,"currency_code":"USD","in_stock":true},{"title":"284 mm \/ 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mm \/ 1","offer_id":52368166813970,"sku":"WXB653S4.5M10x1","price":17.82,"currency_code":"USD","in_stock":true},{"title":"711 mm \/ 1","offer_id":52368166846738,"sku":"WXB711S4.5M10x1","price":20.64,"currency_code":"USD","in_stock":true},{"title":"801 mm \/ 1","offer_id":52368166879506,"sku":"WXBJMCDTBD0811x1","price":23.64,"currency_code":"USD","in_stock":true},{"title":"864 mm \/ 1","offer_id":52368166912274,"sku":"WXB864S4.5M10x1","price":24.07,"currency_code":"USD","in_stock":true},{"title":"905 mm \/ 1","offer_id":52368166945042,"sku":"WXB905S4.5M10x1","price":25.54,"currency_code":"USD","in_stock":true},{"title":"180 mm \/ 2","offer_id":52368166977810,"sku":"WXB180S4.5M10x2","price":17.82,"currency_code":"USD","in_stock":true},{"title":"225 mm \/ 2","offer_id":52368167010578,"sku":"WXB225S4.5M10x2","price":17.82,"currency_code":"USD","in_stock":true},{"title":"252 mm \/ 2","offer_id":52368167043346,"sku":"WXB252S4.5M10x2","price":19.18,"currency_code":"USD","in_stock":true},{"title":"275 mm \/ 2","offer_id":52368167076114,"sku":"WXB275S4.5M10x2","price":20.54,"currency_code":"USD","in_stock":true},{"title":"284 mm \/ 2","offer_id":52368167108882,"sku":"WXB284S4.5M10x2","price":20.54,"currency_code":"USD","in_stock":true},{"title":"297 mm \/ 2","offer_id":52368167141650,"sku":"WXB297S4.5M10x2","price":20.54,"currency_code":"USD","in_stock":true},{"title":"315 mm \/ 2","offer_id":52368167174418,"sku":"WXB315S4.5M10x2","price":21.9,"currency_code":"USD","in_stock":true},{"title":"324 mm \/ 2","offer_id":52368167207186,"sku":"WXB324S4.5M10x2","price":21.9,"currency_code":"USD","in_stock":true},{"title":"333 mm \/ 2","offer_id":52368167239954,"sku":"WXB333S4.5M10x2","price":21.9,"currency_code":"USD","in_stock":true},{"title":"338 mm \/ 2","offer_id":52368167272722,"sku":"WXB338S4.5M10x2","price":22.0,"currency_code":"USD","in_stock":true},{"title":"342 mm \/ 2","offer_id":52368167305490,"sku":"WXB342S4.5M10x2","price":22.0,"currency_code":"USD","in_stock":true},{"title":"347 mm \/ 2","offer_id":52368167338258,"sku":"WXB347S4.5M10x2","price":22.0,"currency_code":"USD","in_stock":true},{"title":"351 mm \/ 2","offer_id":52368167371026,"sku":"WXB351S4.5M10x2","price":22.0,"currency_code":"USD","in_stock":true},{"title":"360 mm \/ 2","offer_id":52368167403794,"sku":"WXB360S4.5M10x2","price":22.17,"currency_code":"USD","in_stock":true},{"title":"369 mm \/ 2","offer_id":52368167436562,"sku":"WXB369S4.5M10x2","price":23.53,"currency_code":"USD","in_stock":true},{"title":"382 mm \/ 2","offer_id":52368167469330,"sku":"WXB382S4.5M10x2","price":23.64,"currency_code":"USD","in_stock":true},{"title":"396 mm \/ 2","offer_id":52368167502098,"sku":"WXB396S4.5M10x2","price":23.8,"currency_code":"USD","in_stock":true},{"title":"414 mm \/ 2","offer_id":52368167534866,"sku":"WXB414S4.5M10x2","price":23.91,"currency_code":"USD","in_stock":true},{"title":"450 mm \/ 2","offer_id":52368167567634,"sku":"WXB450S4.5M10x2","price":25.54,"currency_code":"USD","in_stock":true},{"title":"486 mm \/ 2","offer_id":52368167600402,"sku":"WXB486S4.5M10x2","price":27.17,"currency_code":"USD","in_stock":true},{"title":"491 mm \/ 2","offer_id":52368167633170,"sku":"WXB491S4.5M10x2","price":27.17,"currency_code":"USD","in_stock":true},{"title":"500 mm \/ 2","offer_id":52368167665938,"sku":"WXB500S4.5M10x2","price":27.17,"currency_code":"USD","in_stock":true},{"title":"504 mm \/ 2","offer_id":52368167698706,"sku":"WXB504S4.5M10x2","price":29.89,"currency_code":"USD","in_stock":true},{"title":"540 mm \/ 2","offer_id":52368167731474,"sku":"WXB540S4.5M10x2","price":30.16,"currency_code":"USD","in_stock":true},{"title":"558 mm \/ 2","offer_id":52368167764242,"sku":"WXB558S4.5M10x2","price":30.33,"currency_code":"USD","in_stock":true},{"title":"630 mm \/ 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2","offer_id":52368167960850,"sku":"WXB905S4.5M10x2","price":49.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_5859c6e6-606d-4bdc-a832-1818b726535d.jpg?v=1781506908","url":"https:\/\/homediyer.com\/de\/products\/s4-5m-timing-belt-10mm-wide-closed-loop-synchronous-belt","provider":"HomeDIYer","version":"1.0","type":"link"}