{"product_id":"12a-chain-sprocket-steel-sprockets-12t-40teeth-19-05mm-pitch-for-roller-chain","title":"12A Chain Sprocket Steel Sprockets 12T - 40Teeth 19.05mm Pitch For Roller Chain","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e12A Roller Chain Sprockets — Reliable Steel Drive Components for Every DIY Build\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or undersized sprocket causes chain skip, premature wear, or drive failure, the entire project stalls. Whether you are a maker rebuilding a go-kart, a technician maintaining a conveyor line, or a hobbyist assembling a custom power-transmission system, you need a sprocket that fits precisely and holds up under load.\u003c\/p\u003e\n\u003cp\u003eThese 12A roller chain sprockets are machined from carbon steel and are available in tooth counts ranging from 12T to 40T. The 12A designation corresponds to a 19.05 mm (¾ inch) pitch, matching the widely used #60 ANSI \/ ISO 12A roller chain standard. Bore sizes vary by tooth count — see variant options for exact bore dimensions.\u003c\/p\u003e\n\u003cp\u003eTypical applications include go-kart and mini-bike final drives, agricultural equipment chain drives, light industrial conveyor systems, and custom CNC or robotics power-transmission builds requiring a 19.05 mm pitch roller chain sprocket replacement.\u003c\/p\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 ANSI #60 \/ ISO 12A roller chain with 19.05 mm (¾ in) pitch. Verify bore diameter and hub style against your shaft before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 12A Roller Chain Sprockets\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003ePrecision 19.05 mm Pitch\u003c\/strong\u003e\n\u003cp\u003eMachined to match the ANSI #60 \/ ISO 12A standard exactly, ensuring smooth chain engagement and minimal vibration across the full tooth range from 12T to 40T.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e\n\u003cp\u003eManufactured from carbon steel for a strong strength-to-weight ratio, capable of handling the torque demands of go-karts, conveyors, and light industrial drives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eWide Tooth-Count Selection\u003c\/strong\u003e\n\u003cp\u003eAvailable from 12T up to 40T in a single product listing, letting you dial in the exact gear ratio your drive system requires without sourcing from multiple suppliers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eConsistent Bore Tolerances\u003c\/strong\u003e\n\u003cp\u003eEach sprocket is bored to close tolerances so it seats securely on the shaft. Bore diameter varies by tooth count — select your variant to confirm the exact bore size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eDirect Replacement Fit\u003c\/strong\u003e\n\u003cp\u003eDimensionally compatible with OEM and aftermarket 12A sprockets, making these a straightforward drop-in replacement for worn or damaged drive sprockets in existing assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e \u003cstrong\u003eVersatile Application Range\u003c\/strong\u003e\n\u003cp\u003eSuited for go-karts, mini-bikes, agricultural machinery, conveyor systems, and custom robotics or CNC builds — anywhere a 19.05 mm pitch roller chain drive is used.\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 — 12A Roller Chain Sprockets\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003eANSI #60 \/ ISO 12A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Pitch\u003c\/th\u003e\n\u003ctd\u003e19.05 mm (¾ in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e12T – 40T (see 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\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\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eApplicable Chain Width\u003c\/th\u003e\n\u003ctd\u003eTypically 9.5 – 12.7 mm inner width (standard #60 chain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eKeyed bore or plain bore — see 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 drive sprocket teeth to get the reduction ratio. For go-karts, a common setup pairs a small drive sprocket (12T–14T) with a larger driven sprocket (60T–72T). For conveyor or industrial use, match the ratio to your required output speed and torque. Select your tooth count from the variant options above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat chain does this sprocket fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese sprockets are designed for ANSI #60 \/ ISO 12A roller chain with a 19.05 mm (¾ inch) pitch. Do not use with #50 (15.875 mm pitch) or #80 (25.4 mm pitch) chain — the pitch must match exactly for safe and reliable operation.\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. Each tooth-count variant has a specific bore diameter listed in the variant details. If your shaft requires a custom bore, a local machine shop can bore the sprocket to size after purchase. Always confirm the bore dimension in the variant options before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs carbon steel strong enough for my drive system?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel offers a solid balance of tensile strength and machinability, making it well-suited for go-karts, light industrial conveyors, and agricultural equipment operating under moderate to heavy loads. For highly corrosive environments (salt water, chemical exposure), consider adding a protective coating or consult us about stainless options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this sprocket rust or corrode outdoors?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel can oxidize when exposed to moisture over time. For outdoor or wet environments, apply a chain lubricant regularly and consider a rust-inhibiting spray coating on the sprocket body. Keeping the chain properly lubricated also significantly extends sprocket life by reducing metal-to-metal contact.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this as a direct replacement for a worn sprocket?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — these sprockets are dimensionally compatible with standard ANSI #60 \/ ISO 12A sprockets. Match the tooth count and bore diameter of your existing sprocket, and this will fit as a drop-in replacement. If your old sprocket has a keyway, confirm the keyway dimensions in the variant details or contact us to confirm compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I replace the chain at the same time as the sprocket?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIt is strongly recommended. A worn chain will accelerate wear on a new sprocket because the stretched chain pitch no longer matches the sprocket tooth geometry precisely. Replacing both together ensures even load distribution, quieter operation, and a longer service life for the entire drive system.\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 above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"（12A）12T","offer_id":52423244677394,"sku":"FAS073331x1","price":118.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-05_2c718442-10e5-4ae3-b98c-b9cc78eb3e92.jpg?v=1782653992","url":"https:\/\/homediyer.com\/products\/12a-chain-sprocket-steel-sprockets-12t-40teeth-19-05mm-pitch-for-roller-chain","provider":"HomeDIYer","version":"1.0","type":"link"}