{"product_id":"double-row-roller-chain-sprocket-08b-10a-12a-16a-carbon-steel","title":"1\/2\" 5\/8\" 3\/4\" 1\" Double Row Roller Chain Sprocket 11T-34T Tooth Carbon Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eDouble Row Roller Chain Sprocket — Precision-Matched for 08B, 10A, 12A \u0026amp; 16A Drive Systems\u003c\/h2\u003e\n\u003cp\u003eWhen a single-row sprocket simply cannot handle the torque load of your conveyor line, packaging machine, or heavy-duty DIY power transmission build, you need a double row roller chain sprocket engineered to share the load across two parallel chain strands. These sprockets are designed for makers, maintenance engineers, and machine builders who cannot afford slippage, premature wear, or misalignment in their drivetrain.\u003c\/p\u003e\n\u003cp\u003eEach sprocket is machined from carbon steel and covers four standard pitch series: 08B (1\/2\" pitch), 10A (5\/8\" pitch), 12A (3\/4\" pitch), and 16A (1\" pitch). Tooth counts range from 11T to 34T, with outside diameters spanning approximately 49 mm (1.93\") to 148 mm (5.83\"). The double-strand tooth profile is precision-cut to ISO\/ANSI chain engagement tolerances, ensuring smooth meshing and reduced vibration across the full speed range.\u003c\/p\u003e\n\u003cp\u003eTypical applications include industrial conveyor drives requiring doubled load capacity, agricultural and food-processing machinery with dual-strand chain runs, and custom DIY power transmission rigs where a single-row sprocket would be undersized. Long-tail use cases: replacement double row sprocket for 08B conveyor, 10A dual strand sprocket for packaging line, 12A carbon steel sprocket 16-tooth, 16A roller chain sprocket 1 inch pitch.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for ISO\/DIN double-strand roller chain — 08B-2 (1\/2\"), 10A-2 (5\/8\"), 12A-2 (3\/4\"), and 16A-2 (1\" pitch). Verify your chain pitch and strand count before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Double Row Roller Chain Sprockets\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n\u003cstrong\u003eFour Pitch Series in One Listing\u003c\/strong\u003e\n\u003cp\u003eCovers 08B (1\/2\"), 10A (5\/8\"), 12A (3\/4\"), and 16A (1\") pitch — select the series that matches your existing double-strand chain without sourcing from multiple suppliers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eDouble-Strand Tooth Profile\u003c\/strong\u003e\n\u003cp\u003eTwin parallel tooth rows machined to ISO\/DIN engagement tolerances, distributing chain pull across two strands to roughly double the effective load capacity versus a single-row sprocket of the same pitch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\n\u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e\n\u003cp\u003eSolid carbon steel body provides the hardness and tensile strength needed for sustained high-torque operation, resisting tooth deformation under shock loads common in conveyor start-stop cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n\u003cstrong\u003eWide Tooth Count Range: 11T – 34T\u003c\/strong\u003e\n\u003cp\u003eFrom compact 11-tooth drive sprockets (small OD, higher speed ratio) up to 34-tooth driven sprockets (larger OD, lower speed ratio) — dial in your exact gear ratio without custom machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n\u003cstrong\u003ePrecise Outside Diameters: 49 – 148 mm\u003c\/strong\u003e\n\u003cp\u003eOutside diameters are listed per variant (49 mm to 148 mm \/ 1.93\" to 5.83\"), so you can confirm physical clearance in your machine frame before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n\u003cstrong\u003eDirect Replacement Geometry\u003c\/strong\u003e\n\u003cp\u003eTooth pitch, roller seating radius, and strand spacing follow ISO 606 \/ ANSI B29.1 standards, making these sprockets dimensionally interchangeable with OEM double-row sprockets of the same series and tooth count.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Double Row Roller Chain Sprocket\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003eISO 606 \/ DIN 8187 (B-series) \u0026amp; ANSI B29.1 (A-series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStrand Configuration\u003c\/th\u003e\n\u003ctd\u003eDouble row (2-strand)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Pitch Series\u003c\/th\u003e\n\u003ctd\u003e08B (1\/2\"), 10A (5\/8\"), 12A (3\/4\"), 16A (1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e11T – 34T (see variant options for per-series availability)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutside Diameter Range\u003c\/th\u003e\n\u003ctd\u003e49 mm – 148 mm (1.93\" – 5.83\")\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\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Type\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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 Style\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eCompatible Chain\u003c\/th\u003e\n\u003ctd\u003e08B-2 \/ 10A-2 \/ 12A-2 \/ 16A-2 double-strand roller chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right pitch series — 08B, 10A, 12A, or 16A?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the pitch series to your existing double-strand roller chain. Measure the distance between the centers of two adjacent chain pins: 1\/2\" (12.7 mm) = 08B, 5\/8\" (15.875 mm) = 10A, 3\/4\" (19.05 mm) = 12A, 1\" (25.4 mm) = 16A. If you are unsure, check the chain manufacturer's part number — the pitch designation is typically embedded in the chain code (e.g., 08B-2, 12A-2).\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat tooth count should I select for my speed ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSpeed ratio = driven sprocket teeth ÷ drive sprocket teeth. For example, a 12-tooth drive sprocket paired with a 24-tooth driven sprocket gives a 2:1 reduction. Choose a smaller tooth count on the drive shaft for speed reduction and torque multiplication, or a larger tooth count for speed increase. The 11T–34T range in this listing covers most common industrial reduction ratios from approximately 1:1 up to 3:1 in a single stage.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhy use a double row sprocket instead of a single row sprocket?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA double row (duplex) sprocket and matching 2-strand chain roughly doubles the load capacity for the same pitch and tooth count compared to a single-strand setup. This is the preferred solution when torque demands exceed the rated working load of a single-strand chain, or when you need redundancy in a critical drive application — without increasing the sprocket diameter or reducing speed.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs carbon steel suitable for outdoor or corrosive environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCarbon steel offers excellent strength and hardness but has limited inherent corrosion resistance. For outdoor, washdown, or mildly corrosive environments, regular lubrication with a chain-compatible grease or oil is recommended to protect tooth surfaces. For highly corrosive or food-grade wet environments, consider stainless steel sprockets instead. In dry, enclosed, or well-lubricated industrial settings, carbon steel is the standard and cost-effective choice.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I confirm the sprocket will fit my shaft and machine frame?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCheck two dimensions before ordering: (1) Outside diameter — listed per variant (49–148 mm), confirm you have adequate clearance in your machine frame or guard. (2) Bore diameter and keyway — listed as \"See variant options\"; contact us to confirm the bore size for your specific variant before ordering if your shaft diameter is a critical constraint. We recommend verifying both dimensions against your existing sprocket or engineering drawing.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan these sprockets replace OEM sprockets on my conveyor or machinery?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, provided the replacement sprocket matches the original in pitch series, tooth count, strand count (double row), and bore diameter. These sprockets are manufactured to ISO 606 \/ ANSI B29.1 dimensional standards, which are the same standards used by most OEM conveyor and machinery manufacturers. Always cross-reference the tooth count, outside diameter, and bore before installation to ensure a drop-in fit.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the B-series (08B, 12A) and A-series (10A, 16A) designations?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe letter suffix indicates the chain standard: B-series follows ISO\/DIN (European standard, e.g., 08B, 12A uses ISO 606), while A-series follows ANSI (North American standard, e.g., 10A, 16A follow ANSI B29.1). Although pitch dimensions are identical between equivalent series (e.g., 08B and 40 ANSI both have 1\/2\" pitch), there are subtle differences in roller diameter and inner plate width. Always match the sprocket series to your chain series — do not mix B-series sprockets with A-series chain or vice versa.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your chain series (Types) and tooth count above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"08B-1\/2\"-11 Tooth \/ 1 \/ 49mm","offer_id":52423383646482,"sku":"GLFBZWYSHXJZC3250x1","price":14.48,"currency_code":"USD","in_stock":true},{"title":"08B-1\/2\"-12 Tooth \/ 1 \/ 53mm","offer_id":52423383679250,"sku":"GLFBZWYSHXJZC3251x1","price":17.2,"currency_code":"USD","in_stock":true},{"title":"08B-1\/2\"-13 Tooth \/ 1 \/ 57mm","offer_id":52423383712018,"sku":"GLFBZWYSHXJZC3252x1","price":20.52,"currency_code":"USD","in_stock":true},{"title":"08B-1\/2\"-14 Tooth \/ 1 \/ 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