{"product_id":"duplex-sprocket-50-10a-roller-chain-5-8-inch-pitch","title":"Duplex Sprocket 5\/8 Inch 15.875mm Pitch 12-50 Tooth for #50 (10A) Roller Chain","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eDuplex Sprocket for #50 (10A) Roller Chain — Reliable Two-Strand Drive Power\u003c\/h2\u003e\n\u003cp\u003eWhen a single-strand sprocket simply cannot handle the torque demands of your conveyor, gearbox, or industrial drive system, you need a duplex sprocket engineered for the job. Makers, maintenance engineers, and machine builders working with #50 (10A) roller chain know that mismatched or worn sprockets cause chain skip, accelerated wear, and costly downtime — this duplex sprocket is the direct-fit solution.\u003c\/p\u003e\n\u003cp\u003eThis duplex sprocket is machined for #50 (10A) roller chain with a 5\/8 inch (15.875 mm) pitch. Available in two styles — With Steps (flanged hub) and Without Steps (plain hub) — and in tooth counts ranging from 11T to 50T, covering a wide range of speed-ratio requirements. Hub bore and keyway dimensions vary by tooth count; see variant options for exact bore specifications.\u003c\/p\u003e\n\u003cp\u003eTypical applications include agricultural machinery duplex chain drives, industrial conveyor two-strand sprocket replacements, gearbox output shaft sprocket upgrades for #50 chain, and DIY power transmission projects requiring a matched duplex sprocket set.\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 #50 (10A) Duplex Roller Chain — 5\/8 inch (15.875 mm) pitch, two-strand. Verify bore diameter and keyway against your shaft before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Duplex Sprockets for #50 (10A) Roller Chain\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eTwo-Strand Duplex Design\u003c\/strong\u003e — Engineered to run #50 (10A) duplex roller chain, doubling load capacity compared to a simplex sprocket of the same pitch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003e5\/8 Inch (15.875 mm) Pitch\u003c\/strong\u003e — Precisely matched to ANSI #50 \/ ISO 10A chain pitch for smooth, low-vibration engagement across the full tooth range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔢\u003c\/span\u003e\u003cstrong\u003eWide Tooth Count Selection\u003c\/strong\u003e — Available from 11T to 50T, letting you dial in the exact drive ratio your application requires without custom machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eWith Steps or Without Steps\u003c\/strong\u003e — Choose the flanged-hub (With Steps) style for positive chain alignment, or the plain-hub (Without Steps) style for compact installations with limited axial clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Finish\u003c\/strong\u003e — Surface treated to resist oxidation in typical workshop and light industrial environments, extending service life between maintenance intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eDirect Replacement Fit\u003c\/strong\u003e — Conforms to standard ANSI #50 \/ ISO 10A duplex sprocket dimensions, making it a drop-in replacement for worn sprockets on existing machinery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Duplex Roller Chain Sprocket\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003eANSI #50 \/ ISO 10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Type\u003c\/th\u003e\n\u003ctd\u003eDuplex (Two-Strand) Roller Chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch\u003c\/th\u003e\n\u003ctd\u003e5\/8 inch (15.875 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e11T – 50T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStyle\u003c\/th\u003e\n\u003ctd\u003eWith Steps (flanged hub) \/ Without Steps (plain hub)\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\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSurface treated (oxidation resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSet Screw\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. Divide the driven sprocket teeth by the driver sprocket teeth to get the reduction ratio. For example, a 12T driver paired with a 24T driven sprocket gives a 2:1 reduction. Select the tooth count that achieves your target output speed or torque based on your motor RPM and load requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the \"With Steps\" and \"Without Steps\" styles?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e\"With Steps\" refers to a flanged or stepped hub profile that helps keep the duplex chain laterally aligned on the sprocket, which is useful in applications where chain wander is a concern. \"Without Steps\" is a plain hub profile suited for compact drive arrangements where axial space is limited or where the chain alignment is controlled by other means such as guide rails.\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\u003eThis sprocket is designed for ANSI #50 \/ ISO 10A \u003cstrong\u003eduplex\u003c\/strong\u003e (two-strand) roller chain with a 5\/8 inch (15.875 mm) pitch. It will not correctly engage a simplex (single-strand) #50 chain or chains of a different pitch. Confirm your chain is a duplex type before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I verify the bore size fits my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your shaft diameter with a caliper. The bore diameter for each tooth count variant is listed in the variant details. If you need a custom bore size, the sprocket can typically be re-bored by a local machine shop. Always confirm the bore, keyway width, and set screw position match your shaft before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is this duplex sprocket under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe load capacity depends on the tooth count, chain speed, and lubrication conditions. As a duplex sprocket, it carries approximately twice the working load of a comparable simplex sprocket. For exact working load limits, refer to the ANSI #50 chain manufacturer's load tables and apply an appropriate service factor for your application type (smooth, moderate shock, or heavy shock).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this sprocket corrosion resistant for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe sprocket has a surface treatment that provides resistance to light oxidation in typical workshop and indoor industrial environments. For outdoor, washdown, or high-humidity applications, we recommend applying a chain lubricant or anti-corrosion coating regularly. For highly corrosive environments, contact us to discuss material options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this sprocket as a direct replacement for a worn sprocket on existing machinery?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. This sprocket conforms to standard ANSI #50 \/ ISO 10A duplex sprocket dimensions, making it suitable as a drop-in replacement on most standard industrial machinery. Verify the tooth count, bore diameter, hub style (with or without steps), and overall width match your existing sprocket before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Style, Model, and Pitch \u0026amp; Number of Teeth above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"With Steps \/ #50（10A） \/ 5\/8 inch（15.875 mm） \u0026 12T","offer_id":52423225704722,"sku":"PENG073188x1","price":42.4,"currency_code":"USD","in_stock":true},{"title":"With Steps \/ #50（10A） \/ 5\/8 inch（15.875 mm） \u0026 13T","offer_id":52423225737490,"sku":"PENG073189x1","price":56.98,"currency_code":"USD","in_stock":true},{"title":"With Steps \/ #50（10A） \/ 5\/8 inch（15.875 mm） \u0026 14T","offer_id":52423225770258,"sku":"PENG073190x1","price":64.98,"currency_code":"USD","in_stock":true},{"title":"With Steps \/ #50（10A） \/ 5\/8 inch（15.875 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