{"product_id":"25-chain-drive-sprocket-9t-pitch-6-35mm-04c9t-for-25-1-4-roller-chain","title":"#25 Chain Drive Sprocket 9T Pitch 6.35mm 04C9T For #25 1\/4\" Roller Chain","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e#25 Roller Chain Sprocket 9T — Reliable Drive Power for #25 1\/4\" Chain Systems\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or undersized sprocket causes chain skipping, premature wear, or drive failure, finding an exact-fit replacement becomes critical. The 04C9T is a 9-tooth drive sprocket engineered specifically for #25 (1\/4\" pitch) roller chain, making it a dependable choice for hobbyists, makers, and repair technicians who need a drop-in solution without custom machining.\u003c\/p\u003e\n\u003cp\u003eThis sprocket features a 6.35 mm (0.25 in) chain pitch and a 9-tooth profile. The bore diameter and hub dimensions are sized to suit compact drive assemblies. The body is typically machined from carbon steel, offering a balance of toughness and machinability suitable for light-to-medium duty applications. Refer to variant options for bore size and any keyway specifications.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include small go-kart and mini-bike final drives, compact conveyor and indexing systems, and DIY motorized project builds where a #25 roller chain drive sprocket replacement is needed. Long-tail applications include \"04C9T sprocket replacement,\" \"#25 chain 9 tooth sprocket,\" and \"6.35mm pitch drive sprocket for go-kart.\"\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 standard \u003cstrong\u003e#25 (04C) roller chain\u003c\/strong\u003e with a \u003cstrong\u003e6.35 mm (1\/4\") pitch\u003c\/strong\u003e. Verify bore diameter and hub style match your shaft before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These #25 Chain Drive Sprockets\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eExact #25 Chain Fit\u003c\/strong\u003e\n\u003cp\u003e9-tooth profile with 6.35 mm pitch matches standard #25 \/ 04C roller chain geometry for smooth, low-noise engagement.\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\u003eMachined from carbon steel for solid load-bearing capacity in light-to-medium duty drive applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eCompact 9-Tooth Design\u003c\/strong\u003e\n\u003cp\u003eSmall tooth count enables higher speed ratios when paired with a larger driven sprocket — ideal for motorized DIY builds and go-kart drives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eDrop-In Replacement\u003c\/strong\u003e\n\u003cp\u003eDimensionally consistent with the 04C9T standard, allowing direct substitution without shaft modification in most setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCorrosion-Resistant Finish\u003c\/strong\u003e\n\u003cp\u003eSurface treatment helps resist oxidation during storage and operation in moderately humid environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eMultiple Quantity Options\u003c\/strong\u003e\n\u003cp\u003eAvailable in single-piece or multi-pack quantities to suit one-off repairs or small production runs.\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 — #25 Roller Chain Drive Sprocket\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e04C9T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003e#25 \/ 04C Roller Chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Pitch\u003c\/th\u003e\n\u003ctd\u003e6.35 mm (0.25 in)\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\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\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003eApprox. 18.2 mm (0.72 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutside Diameter\u003c\/th\u003e\n\u003ctd\u003eApprox. 20–22 mm (0.79–0.87 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Chain\u003c\/th\u003e\n\u003ctd\u003e#25 (1\/4\" pitch) Roller Chain\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 know if this sprocket fits my #25 roller chain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis sprocket is designed for standard #25 roller chain with a 6.35 mm (1\/4\") pitch. Measure your existing chain's pitch — the distance between the centers of two adjacent pins. If it measures 6.35 mm, this sprocket is chain-compatible. You also need to confirm the bore diameter matches your shaft diameter before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore diameter does this sprocket come in?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBore diameter options vary by variant. Please select your required bore size from the variant options above. If you need a custom bore, contact us to confirm availability before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this sprocket strong enough for go-kart or mini-bike use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, for light-to-medium duty applications such as go-karts, mini-bikes, and small motorized vehicles, a carbon steel 9-tooth #25 sprocket is a standard choice. Ensure your chain tension and alignment are correct to maximize service life. For heavy-duty or high-RPM industrial use, consult a drive engineer for load calculations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this sprocket rust or corrode?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe sprocket has a surface finish that provides moderate corrosion resistance for typical indoor or sheltered outdoor use. For wet or highly corrosive environments, we recommend applying chain lubricant regularly and considering a stainless steel or zinc-plated alternative if available in your size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this sprocket with a #25H (heavy) roller chain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e#25H heavy chain shares the same 6.35 mm pitch as standard #25 chain, so the tooth profile is compatible. However, #25H chain has thicker side plates, so verify there is adequate clearance between the sprocket hub and the chain plates before running under load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right number of teeth for my drive ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eDrive ratio = driven sprocket teeth ÷ drive sprocket teeth. A 9-tooth drive sprocket paired with an 18-tooth driven sprocket gives a 2:1 reduction — the output shaft turns at half the input speed with twice the torque. For higher speed reduction, pair this 9T sprocket with a larger driven sprocket. For less reduction, use a driven sprocket closer in tooth count.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this sprocket include a set screw or keyway?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eKeyway and set screw availability depend on the specific variant. Please check the variant options or contact us to confirm the hub configuration before ordering if your application requires a keyed bore.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your bore size and quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"Default Title","offer_id":52423229505810,"sku":"TCD14936","price":4.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_fa5dc2f2-99f7-4f7b-bc06-df4640b69e1c.jpg?v=1782651251","url":"https:\/\/homediyer.com\/products\/25-chain-drive-sprocket-9t-pitch-6-35mm-04c9t-for-25-1-4-roller-chain","provider":"HomeDIYer","version":"1.0","type":"link"}