{"product_id":"35-40-50-flat-chain-drive-sprocket-30t-45t-06b-08b-10a-roller-chain","title":"#35 #40 #50 Flat Chain Drive Sprocket 30T-40T For 06B 08B 10A Roller Chain","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eANSI #35 #40 #50 Flat Chain Drive Sprocket — Precision Fit for 06B, 08B \u0026amp; 10A Roller Chain\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or mismatched sprocket causes chain skip, premature wear, or unexpected downtime, the fix starts with a correctly dimensioned replacement. Makers, fabricators, and mechanical hobbyists who build go-karts, mini-bikes, conveyor systems, or custom power-transmission rigs need a sprocket that matches their chain pitch exactly — and holds up under continuous load without wobble or slop.\u003c\/p\u003e\n\u003cp\u003eThis flat-bore chain drive sprocket is machined from carbon steel with a natural or zinc-plated finish (see variant options for exact finish). Available in three ANSI chain series — #35 (pitch 9.525 mm \/ 0.375 in), #40 (pitch 12.7 mm \/ 0.5 in), and #50 (pitch 15.875 mm \/ 0.625 in) — with tooth counts ranging from 30T to 45T. The flat-bore hub style accepts standard set-screw or custom bore machining, making it straightforward to adapt to your shaft diameter.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include go-kart and mini-bike final-drive assemblies using #35 or #40 chain, light industrial conveyor drives running 06B or 08B chain, and DIY power-transmission projects where an #50 \/ 10A sprocket delivers the torque capacity needed for heavier loads. Long-tail search terms like \"ANSI #40 sprocket 40 tooth flat bore\" and \"#35 roller chain sprocket replacement\" describe exactly what this part covers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e \u003cstrong\u003eChain Compatibility:\u003c\/strong\u003e ANSI #35 (06B) · ANSI #40 (08B) · ANSI #50 (10A) — select the matching chain series and tooth count from the variant dropdown above.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Flat Chain Drive Sprockets\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eThree ANSI Chain Series in One Listing\u003c\/strong\u003e\u003cbr\u003eChoose #35 (9.525 mm pitch), #40 (12.7 mm pitch), or #50 (15.875 mm pitch) — all standard ANSI\/ISO dimensions for direct drop-in compatibility with 06B, 08B, and 10A roller chain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦷\u003c\/span\u003e \u003cstrong\u003eWide Tooth-Count Range: 30T to 45T\u003c\/strong\u003e\u003cbr\u003eSelect from 30T up to 45T to dial in your drive ratio precisely. More teeth = lower speed, higher torque; fewer teeth = higher speed, lower torque — pick the ratio your build demands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eFlat-Bore Hub for Easy Shaft Adaptation\u003c\/strong\u003e\u003cbr\u003eThe flat-bore (plain bore) hub design lets you bore or ream to your exact shaft diameter and add a keyway or set-screw as needed, giving you full control over the final fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCarbon Steel Construction for Durability\u003c\/strong\u003e\u003cbr\u003eMachined from carbon steel, these sprockets resist deformation under cyclic loading and maintain tooth profile integrity across extended service intervals in both indoor and light-outdoor environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003ePrecision-Cut Tooth Profile\u003c\/strong\u003e\u003cbr\u003eTooth geometry follows ANSI B29.1 standards, ensuring smooth chain engagement, reduced vibration, and even load distribution across all active teeth — critical for minimizing chain elongation over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eBroad Application Compatibility\u003c\/strong\u003e\u003cbr\u003eSuited for go-karts, mini-bikes, conveyor drives, agricultural equipment, and custom mechanical projects. Works with standard single-strand roller chain in the matching ANSI series.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Flat Chain Drive Sprocket\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Series\u003c\/th\u003e\n\u003ctd\u003e#35 \/ #40 \/ #50 (ANSI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eISO Equivalent\u003c\/th\u003e\n\u003ctd\u003e06B \/ 08B \/ 10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e#35 Chain Pitch\u003c\/th\u003e\n\u003ctd\u003e9.525 mm (0.375 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e#40 Chain Pitch\u003c\/th\u003e\n\u003ctd\u003e12.7 mm (0.500 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e#50 Chain Pitch\u003c\/th\u003e\n\u003ctd\u003e15.875 mm (0.625 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e30T – 45T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Style\u003c\/th\u003e\n\u003ctd\u003eFlat bore (plain bore)\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\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\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStrand\u003c\/th\u003e\n\u003ctd\u003eSingle strand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\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 chain series — #35, #40, or #50?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the sprocket series to your existing roller chain. Measure the chain pitch (center-to-center distance between two consecutive pins): 9.525 mm (3\/8 in) = #35 \/ 06B; 12.7 mm (1\/2 in) = #40 \/ 08B; 15.875 mm (5\/8 in) = #50 \/ 10A. Using a mismatched pitch will cause the chain to skip or jam immediately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I select the correct tooth count for my drive ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eDivide the driver (engine\/motor) sprocket tooth count by the driven (wheel\/output) sprocket tooth count to get your reduction ratio. For example, a 10T driver and a 40T driven sprocket gives a 4:1 reduction. More teeth on the driven sprocket = more torque and lower top speed; fewer teeth = higher speed and less torque. Choose the tooth count that matches your target ratio.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore diameter does this sprocket come with, and can I enlarge it?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis is a flat-bore (plain bore) sprocket — the bore diameter varies by variant (see variant options). Because it is a plain bore, a machinist can bore or ream it to a larger diameter and cut a keyway or drill set-screw holes to match your shaft. Do not exceed the maximum recommended bore for the hub size, as this reduces wall thickness and load capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these sprockets, and what load can they handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe sprockets are machined from carbon steel, which provides solid tensile strength for typical DIY and light industrial applications such as go-karts, mini-bikes, and conveyor drives. Exact load ratings depend on the chain series, tooth count, and operating speed. For heavy-duty or continuous industrial use, consult the chain manufacturer's power rating tables for the matching ANSI chain series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these sprockets corrosion-resistant for outdoor use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel has moderate corrosion resistance. For outdoor or high-humidity environments, apply a chain lubricant regularly and consider a zinc-plated variant if available (see variant options for finish). For fully corrosion-resistant applications, a stainless steel sprocket would be more appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this sprocket fit my go-kart or mini-bike?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMost go-karts and mini-bikes use #35 or #40 single-strand roller chain. Confirm your chain pitch, then select the matching series (#35 or #40) and the tooth count that gives your desired drive ratio. Also verify the bore diameter matches your axle — or plan to have the bore machined to size. If you are unsure, measure your existing sprocket's pitch diameter and tooth count before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this sprocket on a conveyor or industrial drive?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. #40 (08B) and #50 (10A) sprockets are commonly used in light industrial conveyor and power-transmission applications. Ensure the sprocket tooth count and bore are compatible with your conveyor shaft and chain. For continuous-duty industrial use, lubricate the chain regularly and inspect the sprocket teeth for wear at scheduled maintenance intervals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Sprocket Type (chain series + tooth count) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"#35-42T","offer_id":52423337967890,"sku":"GLFBLFFSHXJZC1686x1","price":39.64,"currency_code":"USD","in_stock":true},{"title":"#35-41T","offer_id":52423338000658,"sku":"GLFBLFFSHXJZC1687x1","price":37.84,"currency_code":"USD","in_stock":true},{"title":"#35-40T","offer_id":52423338033426,"sku":"GLFBLFFSHXJZC1688x1","price":36.19,"currency_code":"USD","in_stock":true},{"title":"#35-39T","offer_id":52423338066194,"sku":"GLFBLFFSHXJZC1689x1","price":34.54,"currency_code":"USD","in_stock":true},{"title":"#35-38T","offer_id":52423338098962,"sku":"GLFBLFFSHXJZC1690x1","price":34.05,"currency_code":"USD","in_stock":true},{"title":"#35-36T","offer_id":52423338131730,"sku":"GLFBLFFSHXJZC1691x1","price":31.4,"currency_code":"USD","in_stock":true},{"title":"#35-35T","offer_id":52423338164498,"sku":"GLFBLFFSHXJZC1692x1","price":28.71,"currency_code":"USD","in_stock":true},{"title":"#35-34T","offer_id":52423338197266,"sku":"GLFBLFFSHXJZC1693x1","price":27.17,"currency_code":"USD","in_stock":true},{"title":"#35-33T","offer_id":52423338230034,"sku":"GLFBLFFSHXJZC1694x1","price":36.84,"currency_code":"USD","in_stock":true},{"title":"#35-32T","offer_id":52423338262802,"sku":"GLFBLFFSHXJZC1695x1","price":24.58,"currency_code":"USD","in_stock":true},{"title":"#35-31T","offer_id":52423338295570,"sku":"GLFBLFFSHXJZC1696x1","price":23.2,"currency_code":"USD","in_stock":true},{"title":"#35-30T","offer_id":52423338328338,"sku":"GLFBLFFSHXJZC1697x1","price":20.74,"currency_code":"USD","in_stock":true},{"title":"#35-37T","offer_id":52423338361106,"sku":"GLFBLFFSHXJZC1698x1","price":31.12,"currency_code":"USD","in_stock":true},{"title":"#50-31T","offer_id":52423338393874,"sku":"GLFBLFFSHXJZC1699x1","price":68.41,"currency_code":"USD","in_stock":true},{"title":"#50-32T","offer_id":52423338426642,"sku":"GLFBLFFSHXJZC1700x1","price":73.81,"currency_code":"USD","in_stock":true},{"title":"#50-33T","offer_id":52423338459410,"sku":"GLFBLFFSHXJZC1701x1","price":83.8,"currency_code":"USD","in_stock":true},{"title":"#50-34T","offer_id":52423338492178,"sku":"GLFBLFFSHXJZC1702x1","price":80.73,"currency_code":"USD","in_stock":true},{"title":"#50-35T","offer_id":52423338524946,"sku":"GLFBLFFSHXJZC1703x1","price":87.57,"currency_code":"USD","in_stock":true},{"title":"#50-36T","offer_id":52423338557714,"sku":"GLFBLFFSHXJZC1704x1","price":88.41,"currency_code":"USD","in_stock":true},{"title":"#50-37T","offer_id":52423338590482,"sku":"GLFBLFFSHXJZC1705x1","price":99.51,"currency_code":"USD","in_stock":true},{"title":"#50-38T","offer_id":52423338623250,"sku":"GLFBLFFSHXJZC1706x1","price":182.51,"currency_code":"USD","in_stock":true},{"title":"#50-39T","offer_id":52423338656018,"sku":"GLFBLFFSHXJZC1707x1","price":105.55,"currency_code":"USD","in_stock":true},{"title":"#50-40T","offer_id":52423338688786,"sku":"GLFBLFFSHXJZC1708x1","price":182.35,"currency_code":"USD","in_stock":true},{"title":"#40-31T","offer_id":52423338721554,"sku":"GLFBLFFSHXJZC1709x1","price":40.47,"currency_code":"USD","in_stock":true},{"title":"#40-32T","offer_id":52423338754322,"sku":"GLFBLFFSHXJZC1710x1","price":40.57,"currency_code":"USD","in_stock":true},{"title":"#40-33T","offer_id":52423338787090,"sku":"GLFBLFFSHXJZC1711x1","price":43.76,"currency_code":"USD","in_stock":true},{"title":"#40-34T","offer_id":52423338819858,"sku":"GLFBLFFSHXJZC1712x1","price":48.63,"currency_code":"USD","in_stock":true},{"title":"#40-35T","offer_id":52423338852626,"sku":"GLFBLFFSHXJZC1713x1","price":47.74,"currency_code":"USD","in_stock":true},{"title":"#40-36T","offer_id":52423338885394,"sku":"GLFBLFFSHXJZC1714x1","price":49.71,"currency_code":"USD","in_stock":true},{"title":"#40-37T","offer_id":52423338918162,"sku":"GLFBLFFSHXJZC1715x1","price":51.65,"currency_code":"USD","in_stock":true},{"title":"#40-38T","offer_id":52423338950930,"sku":"GLFBLFFSHXJZC1716x1","price":57.26,"currency_code":"USD","in_stock":true},{"title":"#40-39T","offer_id":52423338983698,"sku":"GLFBLFFSHXJZC1717x1","price":63.08,"currency_code":"USD","in_stock":true},{"title":"#40-40T","offer_id":52423339016466,"sku":"GLFBLFFSHXJZC1718x1","price":62.03,"currency_code":"USD","in_stock":true},{"title":"#40-45T","offer_id":52423339049234,"sku":"GLFBLFFSHXJZC1719x1","price":79.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of4_c8867e1c-2d0f-4469-84d5-8ff37f653ecd.jpg?v=1782803892","url":"https:\/\/homediyer.com\/products\/35-40-50-flat-chain-drive-sprocket-30t-45t-06b-08b-10a-roller-chain","provider":"HomeDIYer","version":"1.0","type":"link"}