{"product_id":"05b-chain-drive-sprocket-10-tooth-28-tooth-roller-chain-pitch-8mm-45-steel","title":"05B Chain Drive Sprocket 10 Tooth - 28 Tooth Roller Chain Pitch 8mm 45# Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e05B Chain Drive Sprocket — Precision 8mm Pitch for Reliable Power Transmission\u003c\/h2\u003e\n    \u003cp\u003eWhen a worn or mismatched sprocket causes chain skip, premature wear, or unexpected downtime, the entire drivetrain suffers. Whether you're a maker building a custom go-kart, a workshop technician maintaining conveyor equipment, or a DIY enthusiast assembling a motorized project, you need a sprocket that meshes cleanly with your 05B roller chain every single time.\u003c\/p\u003e\n    \u003cp\u003eThese 05B chain drive sprockets are machined from 45# medium-carbon steel, delivering a solid balance of hardness and toughness. The tooth profile is cut to match the ISO 05B standard with an 8mm (5\/16 in) pitch. Available tooth counts range from 10T to 28T, covering a bore diameter range typically from 8mm to 25mm (approx. 0.31–0.98 in) depending on the selected variant. A matching 5-meter roller chain option is also available for complete drivetrain builds.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include go-kart and mini-bike chain drives, light-duty conveyor systems, agricultural machinery attachments, and custom motorized DIY builds requiring a compact 05B pitch sprocket for speed reduction or torque multiplication.\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\u003eCompatible with:\u003c\/strong\u003e ISO 05B Roller Chain — 8mm (5\/16 in) Pitch. Verify your chain standard before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 05B Chain Drive Sprockets\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n        \u003cstrong\u003eISO 05B Standard Tooth Profile\u003c\/strong\u003e\u003cbr\u003e\n        Tooth geometry is cut to ISO 05B specification with an 8mm pitch, ensuring consistent chain engagement and minimal backlash across the full tooth-count range.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003e45# Medium-Carbon Steel Construction\u003c\/strong\u003e\u003cbr\u003e\n        Manufactured from 45# carbon steel, offering a tensile strength typically in the 600–800 MPa range — tough enough for sustained mechanical loads without excessive brittleness.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eWide Tooth-Count Selection (10T–28T)\u003c\/strong\u003e\u003cbr\u003e\n        Choose from 10 to 28 teeth to dial in your exact gear ratio. Smaller tooth counts increase speed; larger counts increase torque — giving you full control over your drivetrain output.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\n        \u003cstrong\u003eCorrosion-Resistant Surface Treatment\u003c\/strong\u003e\u003cbr\u003e\n        The steel surface receives a protective finish to resist oxidation in typical workshop and light-outdoor environments, extending service life between maintenance intervals.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n        \u003cstrong\u003eMachined Bore for Accurate Shaft Fit\u003c\/strong\u003e\u003cbr\u003e\n        Each sprocket is machined to a consistent bore tolerance, reducing runout and vibration when mounted on a keyed or set-screw shaft. Bore size varies by tooth count — see variant options.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eAvailable as Single Sprocket or with Matching Roller Chain\u003c\/strong\u003e\u003cbr\u003e\n        Order individual sprockets (1 pcs) for replacement or upgrade, or select the Roller Chain \/ 5 Meter option to source a matched 05B chain for a complete drivetrain assembly.\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — 05B Chain Drive Sprocket\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003eISO 05B\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eChain Pitch\u003c\/th\u003e\n\u003ctd\u003e8mm (5\/16 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e10T \/ 11T \/ 12T \/ 13T \/ 15T \/ 16T \/ 17T \/ 18T \/ 19T \/ 20T \/ 21T \/ 22T \/ 23T \/ 24T \/ 25T \/ 26T \/ 28T\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 Thickness\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\u003eOxidation-resistant protective coating\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eTypically HRC 40–50 (tooth surface)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRoller Chain Option\u003c\/th\u003e\n\u003ctd\u003e05B Roller Chain, 5 Meter length\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Quantities\u003c\/th\u003e\n\u003ctd\u003e1 pcs (sprocket) \/ 5 Meter (roller chain)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eGo-karts, conveyors, agricultural equipment, DIY motorized builds\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 tooth count for my application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThe tooth count determines your gear ratio. Divide the driven sprocket teeth by the drive sprocket teeth to get the reduction ratio. For example, a 10T drive sprocket paired with a 20T driven sprocket gives a 2:1 reduction — doubling torque while halving speed. Use a smaller tooth count on the drive side for more torque, or a larger count for higher output speed.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this sprocket fit my existing 05B roller chain?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes — provided your chain conforms to the ISO 05B standard with an 8mm (5\/16 in) pitch. Verify your chain's pitch marking before ordering. These sprockets are not compatible with #25, #35, or other pitch chains even if the tooth count matches.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bore diameter does each tooth-count variant have?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eBore diameter varies by tooth count and is listed in the variant options. If you need a specific bore size to match your shaft diameter, please check the variant details or contact us to confirm before ordering. Machining to a custom bore is not included.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong is 45# steel — can it handle continuous load?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003e45# medium-carbon steel has a typical tensile strength of 600–800 MPa and is widely used in mechanical power transmission components. It handles sustained moderate loads well. For very high-shock or heavy-industrial applications, consider whether a hardened alloy steel sprocket may be more appropriate for your duty cycle.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs the sprocket corrosion-resistant for outdoor use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThe sprockets carry a protective surface finish that resists light oxidation in typical workshop and sheltered outdoor environments. For prolonged exposure to moisture, salt spray, or chemicals, we recommend applying a chain lubricant or anti-rust coating as part of your regular maintenance routine.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I order the matching 05B roller chain at the same time?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. Select the \"Roller Chain \/ 5 Meter\" variant option to add a 5-meter length of matching 05B roller chain to your order. This is ideal when building a new drivetrain from scratch and ensures chain-to-sprocket pitch compatibility right out of the box.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I mount the sprocket onto my shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese sprockets are designed for shaft mounting via a machined bore. Depending on the variant, the bore may accept a key and keyway or a set screw for shaft retention. Confirm the bore style for your selected tooth count in the variant details, and ensure your shaft diameter matches before installation.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your \u003cstrong\u003eNumber of Teeth\u003c\/strong\u003e and \u003cstrong\u003eAmount\u003c\/strong\u003e above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"10 Tooth \/ 1 pcs","offer_id":52423310082322,"sku":"WSS072844x1","price":5.0,"currency_code":"USD","in_stock":true},{"title":"11 Tooth \/ 1 pcs","offer_id":52423310115090,"sku":"WSS072845x1","price":5.28,"currency_code":"USD","in_stock":true},{"title":"12 Tooth \/ 1 pcs","offer_id":52423310147858,"sku":"WSS072846x1","price":6.02,"currency_code":"USD","in_stock":true},{"title":"13 Tooth \/ 1 pcs","offer_id":52423310180626,"sku":"WSS072847x1","price":7.25,"currency_code":"USD","in_stock":true},{"title":"15 Tooth \/ 1 pcs","offer_id":52423310213394,"sku":"WSS072848x1","price":8.74,"currency_code":"USD","in_stock":true},{"title":"16 Tooth \/ 1 pcs","offer_id":52423310246162,"sku":"WSS072849x1","price":9.49,"currency_code":"USD","in_stock":true},{"title":"17 Tooth \/ 1 pcs","offer_id":52423310278930,"sku":"WSS072850x1","price":10.72,"currency_code":"USD","in_stock":true},{"title":"18 Tooth \/ 1 pcs","offer_id":52423310311698,"sku":"WSS072851x1","price":11.46,"currency_code":"USD","in_stock":true},{"title":"19 Tooth \/ 1 pcs","offer_id":52423310344466,"sku":"WSS072852x1","price":11.74,"currency_code":"USD","in_stock":true},{"title":"20 Tooth \/ 1 pcs","offer_id":52423310377234,"sku":"WSS072853x1","price":12.46,"currency_code":"USD","in_stock":true},{"title":"21 Tooth \/ 1 pcs","offer_id":52423310410002,"sku":"WSS072854x1","price":13.23,"currency_code":"USD","in_stock":true},{"title":"22 Tooth \/ 1 pcs","offer_id":52423310442770,"sku":"WSS072855x1","price":13.71,"currency_code":"USD","in_stock":true},{"title":"23 Tooth \/ 1 pcs","offer_id":52423310475538,"sku":"WSS072856x1","price":14.21,"currency_code":"USD","in_stock":true},{"title":"24 Tooth \/ 1 pcs","offer_id":52423310508306,"sku":"WSS072857x1","price":14.95,"currency_code":"USD","in_stock":true},{"title":"25 Tooth \/ 1 pcs","offer_id":52423310541074,"sku":"WSS072858x1","price":15.71,"currency_code":"USD","in_stock":true},{"title":"26 Tooth \/ 1 pcs","offer_id":52423310573842,"sku":"WSS072859x1","price":16.44,"currency_code":"USD","in_stock":true},{"title":"28 Tooth \/ 1 pcs","offer_id":52423310606610,"sku":"WSS072860x1","price":17.92,"currency_code":"USD","in_stock":true},{"title":"Roller Chain \/ 5 Meter","offer_id":52423310639378,"sku":"WSS073064x1","price":73.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of19_6a3207ad-ae84-45bd-b1d5-2069bdd6ee96.jpg?v=1782734674","url":"https:\/\/homediyer.com\/products\/05b-chain-drive-sprocket-10-tooth-28-tooth-roller-chain-pitch-8mm-45-steel","provider":"HomeDIYer","version":"1.0","type":"link"}