{"product_id":"10mm-bore-13-tooth-chain-idler-sprocket-c45-steel-iso-08b","title":"10mm Bore 13-Tooth Chain Idler Sprocket | C45 Steel ISO 08B","description":"\n\u003ch2\u003e10mm Bore 13-Tooth Chain Idler Sprocket – C45 Carbon Steel, 1\/2\" Pitch\u003c\/h2\u003e\n\u003cp\u003eKeep your machinery running smoothly with this precision-engineered \u003cstrong\u003eChain Idler Sprocket\u003c\/strong\u003e. Designed for ISO 08B roller chains with a 1\/2\" (12.7mm) pitch, this 13-tooth idler sprocket is built from high-grade \u003cstrong\u003eC45 carbon steel\u003c\/strong\u003e with a high-temperature quench-hardened tooth profile — delivering exceptional hardness, wear resistance, and long service life in demanding transmission applications.\u003c\/p\u003e\n\u003cp\u003eFeaturing a sealed internal bearing, the sprocket rotates freely on a fixed shaft without the need for additional lubrication hardware. Its convex idler design ensures consistent chain tension, reducing slack and improving the efficiency and longevity of your drive system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Teeth:\u003c\/strong\u003e 13\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 58mm (2.28\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Diameter:\u003c\/strong\u003e 10mm (0.39\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePitch:\u003c\/strong\u003e 1\/2\" \/ 12.7mm (ISO 08B)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Width:\u003c\/strong\u003e 14mm (0.55\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTooth Width:\u003c\/strong\u003e 7.3mm (0.29\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBump Width:\u003c\/strong\u003e 3.5mm (0.14\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e C45 Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black (heat-treated)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Chain Standard:\u003c\/strong\u003e ISO 08B Roller Chain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e🔩 \u003cstrong\u003eC45 Carbon Steel Construction\u003c\/strong\u003e — High-strength material with heat-treated teeth for superior hardness and durability\u003c\/li\u003e\n  \u003cli\u003e🔄 \u003cstrong\u003eSealed Bearing\u003c\/strong\u003e — Allows free rotation on a fixed shaft; no additional lubrication needed\u003c\/li\u003e\n  \u003cli\u003e⚙️ \u003cstrong\u003eConvex Idler Design\u003c\/strong\u003e — Maintains consistent chain tension for smoother, quieter operation\u003c\/li\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eVersatile Applications\u003c\/strong\u003e — Suitable for milling machines, drilling machines, conveyor systems, and general machinery transmission\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eISO 08B Compatible\u003c\/strong\u003e — Direct fit for standard 1\/2\" pitch roller chains\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eAn idler sprocket is a flat sprocket mounted in a fixed position on a stationary shaft. Unlike drive sprockets, it does not transmit torque — instead, it guides and tensions the chain to prevent sagging or jumping. At least \u003cstrong\u003e3 teeth should remain in mesh\u003c\/strong\u003e with the chain at all times for optimal performance. Do not operate the idler sprocket at speeds exceeding the rated limit for drive sprockets of equivalent size.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Chain Idler Sprocket (pre-assembled with sealed bearing)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eManual measurements may vary by ±2–3%. Please verify dimensions carefully before ordering.\u003c\/li\u003e\n  \u003cli\u003eSlight color variation is possible due to photography lighting and display settings.\u003c\/li\u003e\n  \u003cli\u003eUnit is supplied fully assembled and ready to install.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-300mm-adjustable-pcb-holder-360-rotation-soldering-stand-clamp\"\u003e0–300mm PCB Holder Stand | 360° Rotation Soldering Clamp\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-100mm-tiny-digital-vernier-caliper-portable-measuring-tool\"\u003e0–100mm Tiny Digital Vernier Caliper | Portable Measuring Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-200mm-jewelry-measuring-caliper-bead-stone-gauge-stainless-steel\"\u003e0–200mm Jewelry Caliper – Stainless Steel Bead \u0026amp; Stone Gauge\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor general guidance on mechanical power transmission standards and safe machinery operation practices, refer to \u003ca href=\"https:\/\/www.osha.gov\/machine-guarding\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Machine Guarding resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What chain standard is this idler sprocket compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This sprocket is designed for \u003cstrong\u003eISO 08B roller chains\u003c\/strong\u003e with a standard 1\/2\" (12.7mm) pitch. Always verify your chain's pitch and width before purchasing to ensure a proper fit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the idler sprocket come with a bearing installed?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The sprocket includes a \u003cstrong\u003esealed bearing pre-installed\u003c\/strong\u003e, allowing it to spin freely on a fixed shaft. It is shipped fully assembled and ready to install.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the minimum number of teeth that should engage the chain?\u003c\/h4\u003e\n\u003cp\u003eA: It is recommended that \u003cstrong\u003eat least 3 teeth remain in mesh\u003c\/strong\u003e with the chain at all times for safe and effective operation. This ensures adequate load distribution and prevents premature wear.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What applications is this sprocket suitable for?\u003c\/h4\u003e\n\u003cp\u003eA: This idler sprocket is widely used in \u003cstrong\u003emilling machines, drilling machines, conveyor systems\u003c\/strong\u003e, and a variety of other industrial and mechanical transmission setups requiring ISO 08B chain compatibility.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What chain standard is this idler sprocket compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This sprocket is designed for ISO 08B roller chains with a standard 1\/2\\\" (12.7mm) pitch. Always verify your chain's pitch and width before purchasing to ensure a proper fit.\"}}, {\"@type\": \"Question\", \"name\": \"Does the idler sprocket come with a bearing installed?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The sprocket includes a sealed bearing pre-installed, allowing it to spin freely on a fixed shaft. It is shipped fully assembled and ready to install.\"}}, {\"@type\": \"Question\", \"name\": \"What is the minimum number of teeth that should engage the chain?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is recommended that at least 3 teeth remain in mesh with the chain at all times for safe and effective operation. This ensures adequate load distribution and prevents premature wear.\"}}, {\"@type\": \"Question\", \"name\": \"What applications is this sprocket suitable for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This idler sprocket is widely used in milling machines, drilling machines, conveyor systems, and a variety of other industrial and mechanical transmission setups requiring ISO 08B chain compatibility.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Sewing \u0026 Hand Tools\", \"item\": \"https:\/\/oasis-select.com\/collections\/sewing-hand-tools\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"10mm Bore 13-Tooth Chain Idler Sprocket | C45 Steel ISO 08B\", \"item\": \"https:\/\/oasis-select.com\/products\/10mm-bore-13-tooth-chain-idler-sprocket-c45-steel-iso-08b\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"Default Title","offer_id":47755410931817,"sku":"\u003cnone\u003e","price":23.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S085d0ccccf964b67b83e2b0e05d87ba40.webp?v=1783269045","url":"https:\/\/oasis-select.com\/products\/10mm-bore-13-tooth-chain-idler-sprocket-c45-steel-iso-08b","provider":"Oasis Select","version":"1.0","type":"link"}