{"product_id":"10a-duplex-chain-sprocket-15-875mm-pitch-11t-30t-50-roller-chain-45-steel","title":"11T - 30T Duplex Chain Sprocket Pitch 15.875mm For #50 10A Roller Chain 45#Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e10A Duplex Chain Sprocket — Precision 15.875mm Pitch Drive for #50 Roller Chain\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or mismatched sprocket causes chain skip, vibration, or premature wear in your drive system, the entire machine suffers. Engineers, fabricators, and serious DIY builders who rely on #50 (10A) duplex roller chain need a sprocket machined to exact pitch tolerances — not a loose approximation. This 10A duplex chain sprocket is engineered for demanding power-transmission applications where dimensional accuracy and material strength are non-negotiable.\u003c\/p\u003e\n\u003cp\u003eEach sprocket is machined from 45# medium-carbon steel, delivering a strong balance of hardness and toughness suited for cyclic loading. The pitch is precisely 15.875 mm (5\/8 in), matching the ISO 10A \/ ANSI #50 duplex chain standard. Tooth counts range from 11T to 30T, with bore and hub dimensions scaled accordingly across variants — typically featuring bore diameters from approximately 12 mm (0.47 in) on the smallest models up to 40 mm (1.57 in) on the largest, though exact bore dimensions vary by tooth count (see variant options).\u003c\/p\u003e\n\u003cp\u003eTypical use cases include industrial conveyor drives requiring synchronized duplex-strand power transfer, agricultural and light-industrial gearbox output stages where a compact sprocket-and-chain reduction is needed, and custom DIY drivetrain builds — such as go-karts, electric bikes, or workshop machinery — where a reliable 10A duplex sprocket replacement or upgrade is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e \u003cstrong\u003eCompatible with:\u003c\/strong\u003e ISO 10A \/ ANSI #50 Duplex Roller Chain — Pitch 15.875 mm (5\/8 in), two-strand configuration.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 10A Duplex Chain Sprockets\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eExact 15.875 mm Pitch Machining\u003c\/strong\u003e\u003cbr\u003eEach tooth profile is cut to match the ISO 10A \/ ANSI #50 duplex chain pitch precisely, ensuring smooth engagement, minimal noise, and reduced chain wear over extended service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003e45# Medium-Carbon Steel Construction\u003c\/strong\u003e\u003cbr\u003eManufactured from 45# carbon steel, these sprockets offer a reliable combination of tensile strength and machinability — suitable for moderate-to-heavy cyclic loads in power-transmission drives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eWide Tooth-Count Range: 11T to 30T\u003c\/strong\u003e\u003cbr\u003eSeventeen tooth-count variants (11T through 30T) let you dial in your exact gear ratio for speed reduction or torque multiplication without custom fabrication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eDuplex (Double-Strand) Chain Compatibility\u003c\/strong\u003e\u003cbr\u003eThe hub and tooth geometry are designed specifically for two-strand 10A duplex chain, doubling load capacity compared to a simplex sprocket of the same pitch and tooth count.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCorrosion-Resistant Surface Finish\u003c\/strong\u003e\u003cbr\u003eA protective surface treatment helps resist oxidation in typical workshop and light-industrial environments, extending service intervals between maintenance cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eDrop-In Replacement Geometry\u003c\/strong\u003e\u003cbr\u003eTooth profiles conform to ISO 606 \/ ANSI B29.1 standards, making these sprockets direct replacements for OEM 10A duplex sprockets on conveyors, gearboxes, and custom drive assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 10A Duplex Chain Sprocket\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003eISO 10A \/ ANSI #50 Duplex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Pitch\u003c\/th\u003e\n\u003ctd\u003e15.875 mm (5\/8 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Strands\u003c\/th\u003e\n\u003ctd\u003e2 (Duplex)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e11T – 30T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45# Medium-Carbon Steel\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\u003eHub Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOverall Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter Range\u003c\/th\u003e\n\u003ctd\u003eApprox. 56 mm – 153 mm (2.2 in – 6.0 in), varies by tooth count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Treatment\u003c\/th\u003e\n\u003ctd\u003eOxidation-resistant finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplicable Chain\u003c\/th\u003e\n\u003ctd\u003e#50 \/ 10A Duplex Roller Chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 Pcs\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\u003eSelect your tooth count based on your required speed ratio. Divide the driver sprocket teeth by the driven sprocket teeth to get your reduction ratio. For example, a 15T driver paired with a 30T driven sprocket gives a 2:1 reduction, halving output speed while doubling torque. If you are replacing an existing sprocket, match the tooth count on the worn part exactly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this sprocket fit my existing #50 roller chain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — provided your chain is a standard ISO 10A \/ ANSI #50 \u003cem\u003eduplex\u003c\/em\u003e (two-strand) roller chain with a 15.875 mm pitch. These sprockets are not compatible with simplex (single-strand) #50 chain or with chains of a different pitch. If you are unsure, measure your chain's pitch (pin center to pin center) and count the strands before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the bore diameter, and can it be re-bored?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBore diameter varies by tooth count — please check the variant detail page or contact us to confirm the bore for your selected model. The 45# steel construction is machinable, so a qualified machine shop can re-bore and keyway the hub to match your shaft diameter if the stock bore is smaller than needed. Do not bore beyond the maximum recommended bore for each tooth count, as this reduces hub wall thickness and load capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these sprockets under continuous load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e45# medium-carbon steel has a typical tensile strength of approximately 600–800 MPa after standard heat treatment. For continuous-duty applications, size your sprocket selection using the chain manufacturer's rated working load for #50 duplex chain and apply an appropriate service factor for shock or variable loads. Contact us if you need load-rating data for a specific tooth count.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these sprockets corrosion-resistant for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe surface finish provides basic oxidation resistance suitable for typical indoor workshop and light-industrial environments. For outdoor, washdown, or high-humidity applications, we recommend applying a chain lubricant or anti-corrosion coating regularly, or considering stainless-steel alternatives. Contact us to confirm suitability for your specific environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this sprocket as a direct OEM replacement?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIn most cases, yes. The tooth profile conforms to ISO 606 \/ ANSI B29.1 standards, making these sprockets dimensionally interchangeable with OEM 10A duplex sprockets of the same tooth count. Always verify the bore diameter and hub width against your original part before installation to ensure a proper fit on your shaft and within your drive housing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a duplex and a simplex sprocket?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA simplex sprocket is designed for a single-strand roller chain, while a duplex sprocket has a wider hub and tooth geometry to engage two parallel chain strands simultaneously. Duplex configurations roughly double the load-carrying capacity of the drive compared to a simplex setup of the same pitch and tooth count, making them preferred for higher-torque or higher-reliability applications.\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 (Models) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"10A-11 Teeth \/ 1 Pcs","offer_id":52423325974802,"sku":"GLFBQLWGLBZSJ073210x1","price":32.03,"currency_code":"USD","in_stock":true},{"title":"10A-12 Teeth \/ 1 Pcs","offer_id":52423326007570,"sku":"GLFBQLWGLBZSJ073211x1","price":37.39,"currency_code":"USD","in_stock":true},{"title":"10A-13 Teeth \/ 1 Pcs","offer_id":52423326040338,"sku":"GLFBQLWGLBZSJ073212x1","price":42.55,"currency_code":"USD","in_stock":true},{"title":"10A-14 Teeth \/ 1 Pcs","offer_id":52423326073106,"sku":"GLFBQLWGLBZSJ073213x1","price":48.48,"currency_code":"USD","in_stock":true},{"title":"10A-15 Teeth \/ 1 Pcs","offer_id":52423326105874,"sku":"GLFBQLWGLBZSJ073214x1","price":55.01,"currency_code":"USD","in_stock":true},{"title":"10A-16 Teeth \/ 1 Pcs","offer_id":52423326138642,"sku":"GLFBQLWGLBZSJ073215x1","price":66.08,"currency_code":"USD","in_stock":true},{"title":"10A-17 Teeth \/ 1 Pcs","offer_id":52423326171410,"sku":"GLFBQLWGLBZSJ073216x1","price":75.55,"currency_code":"USD","in_stock":true},{"title":"10A-18 Teeth \/ 1 Pcs","offer_id":52423326204178,"sku":"GLFBQLWGLBZSJ073217x1","price":87.65,"currency_code":"USD","in_stock":true},{"title":"10A-20 Teeth \/ 1 Pcs","offer_id":52423326236946,"sku":"GLFBQLWGLBZSJ073218x1","price":107.29,"currency_code":"USD","in_stock":true},{"title":"10A-21 Teeth \/ 1 Pcs","offer_id":52423326269714,"sku":"GLFBQLWGLBZSJ073219x1","price":109.19,"currency_code":"USD","in_stock":true},{"title":"10A-22 Teeth \/ 1 Pcs","offer_id":52423326302482,"sku":"GLFBQLWGLBZSJ073220x1","price":113.55,"currency_code":"USD","in_stock":true},{"title":"10A-23 Teeth \/ 1 Pcs","offer_id":52423326335250,"sku":"GLFBQLWGLBZSJ073221x1","price":165.31,"currency_code":"USD","in_stock":true},{"title":"10A-24 Teeth \/ 1 Pcs","offer_id":52423326368018,"sku":"GLFBQLWGLBZSJ073222x1","price":181.9,"currency_code":"USD","in_stock":true},{"title":"10A-25 Teeth \/ 1 Pcs","offer_id":52423326400786,"sku":"GLFBQLWGLBZSJ073223x1","price":191.28,"currency_code":"USD","in_stock":true},{"title":"10A-26 Teeth \/ 1 Pcs","offer_id":52423326433554,"sku":"GLFBQLWGLBZSJ073224x1","price":209.97,"currency_code":"USD","in_stock":true},{"title":"10A-28 Teeth \/ 1 Pcs","offer_id":52423326466322,"sku":"GLFBQLWGLBZSJ073225x1","price":222.62,"currency_code":"USD","in_stock":true},{"title":"10A-30 Teeth \/ 1 Pcs","offer_id":52423326499090,"sku":"GLFBQLWGLBZSJ073226x1","price":245.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture10of11_249637eb-d58d-44f7-9e11-7f578a4b8175.jpg?v=1782739390","url":"https:\/\/homediyer.com\/products\/10a-duplex-chain-sprocket-15-875mm-pitch-11t-30t-50-roller-chain-45-steel","provider":"HomeDIYer","version":"1.0","type":"link"}