{"product_id":"06b-1-pilot-bore-sprocket-3-8-pitch-15-17-teeth-simplex","title":"3\/8\" Pitch 06B Steel Pilot Bore Sprocket Simplex Roller Chain 15-17 Teeth 06B-1","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e06B-1 Pilot Bore Sprocket — Precision 3\/8\" Pitch Simplex Chain Drive Component\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or undersized sprocket is causing chain skip, uneven wear, or drivetrain noise, the fix starts with a correctly matched replacement. This 06B-1 pilot bore sprocket is designed for makers, machine builders, and mechanical engineers who need a reliable simplex roller chain sprocket that can be bored and keyed to exact shaft specifications on-site.\u003c\/p\u003e\n\u003cp\u003eEach sprocket is machined from carbon steel and conforms to the ISO 06B-1 standard with a 3\/8\" (9.525 mm) pitch. Available in 15, 16, and 17 tooth counts, with pilot bore diameters ranging from 12 mm to 25 mm (approximately 0.47\" to 0.98\"), including keyway options (15×5 mm, 17×5 mm, and 12×4 mm). Sold individually (1 PCS) or in pairs (2 PCS).\u003c\/p\u003e\n\u003cp\u003eTypical applications include light conveyor systems requiring a 06B simplex sprocket replacement, small agricultural machinery drivetrain builds using 3\/8\" pitch roller chain, and custom automation rigs where a pilot bore sprocket for 06B-1 chain allows on-site bore finishing to match non-standard shaft diameters.\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 ISO 06B-1 simplex roller chain with 3\/8\" (9.525 mm) pitch. Verify your chain pitch and shaft diameter before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 06B-1 Pilot Bore Sprockets\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eISO 06B-1 Standard Compliance\u003c\/strong\u003e\n\u003cp\u003eManufactured to ISO 06B-1 simplex chain specifications, ensuring dimensional accuracy and direct interchangeability with standard 06B-1 roller chain across industrial and DIY drivetrain applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003ePilot Bore Design for On-Site Finishing\u003c\/strong\u003e\n\u003cp\u003eThe pilot bore format allows machinists and builders to bore and key the hub to their exact shaft diameter, eliminating the need for custom-ordered sprockets and reducing lead time significantly.\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 and wear resistance under continuous chain engagement, suitable for both low-speed and moderate-speed drivetrain configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eMultiple Tooth Counts: 15, 16, 17 Teeth\u003c\/strong\u003e\n\u003cp\u003eThree tooth count options let you fine-tune your drive ratio without changing chain pitch. Useful when adjusting output speed or torque in conveyor, feeder, or power transmission builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔑\u003c\/span\u003e \u003cstrong\u003eKeyway Bore Options Available\u003c\/strong\u003e\n\u003cp\u003eSelect from plain bore (12–25 mm) or pre-cut keyway bores (15×5 mm, 17×5 mm, 12×4 mm) to match your shaft and key configuration directly, saving machining time in the workshop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eSingle or Twin-Pack Quantities\u003c\/strong\u003e\n\u003cp\u003eAvailable in 1 PCS or 2 PCS per order, making it straightforward to source a matched pair for dual-sprocket shaft setups or to keep a spare on hand for maintenance schedules.\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 — 06B-1 Pilot Bore Sprocket\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003eISO 06B-1 Simplex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Pitch\u003c\/th\u003e\n\u003ctd\u003e3\/8\" (9.525 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e15 \/ 16 \/ 17 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Type\u003c\/th\u003e\n\u003ctd\u003ePilot Bore (plain or keyway)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e12 mm, 14 mm, 15 mm, 18 mm, 25 mm (plain); 12×4 mm, 15×5 mm, 17×5 mm (keyway)\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\u003eHub Style\u003c\/th\u003e\n\u003ctd\u003ePilot Bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 PCS or 2 PCS (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutside 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\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 number of teeth 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 driver sprocket teeth to get the ratio. For example, a 15-tooth driver paired with a 30-tooth driven sprocket gives a 2:1 reduction. Choose 15T for higher speed output, 16T or 17T for slightly more torque at the same input speed. Always match the chain pitch (06B-1, 3\/8\") on both sprockets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore diameter should I select?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect the bore diameter that matches your shaft diameter. If your shaft is 12 mm, choose the 12 mm bore option. For shafts requiring a key for positive drive engagement, select the appropriate keyway option (e.g., 15×5 mm keyway for a 15 mm shaft with a 5 mm key slot). If your shaft diameter falls between listed sizes, choose the next smaller bore and have it finish-bored to size by a machinist.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this sprocket compatible with my existing 06B roller chain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — this sprocket is manufactured to ISO 06B-1 simplex specifications with a 3\/8\" (9.525 mm) pitch, which is the defining compatibility factor. As long as your roller chain is rated 06B-1 simplex with 3\/8\" pitch, this sprocket will mesh correctly. Confirm the chain pitch stamped on your chain or in your equipment manual before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is this sprocket under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe sprocket is machined from carbon steel, which provides solid tensile strength and wear resistance for typical 06B-1 chain drive loads. For exact load ratings, refer to the ISO 06B-1 standard or contact us with your application's torque and RPM requirements so we can confirm suitability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this sprocket resist corrosion?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel has moderate corrosion resistance. For indoor or dry environments, the material performs well with standard lubrication. For outdoor or high-humidity applications, we recommend applying a rust-inhibiting lubricant or chain oil regularly. If your environment requires higher corrosion resistance, contact us to confirm available finish options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I order 1 PCS or 2 PCS?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eOrder 1 PCS if you are replacing a single sprocket or building a single-sprocket shaft setup. Order 2 PCS if your drivetrain uses a matched pair on the same shaft, or if you want to keep a spare for scheduled maintenance. Both pieces in a 2 PCS order are identical in model, tooth count, and bore specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this sprocket with duplex (double-strand) chain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. This is an 06B-1 simplex sprocket designed for single-strand 06B roller chain only. For duplex (two-strand) chain applications, you would need an 06B-2 duplex sprocket. Using a simplex sprocket with duplex chain will result in misalignment and accelerated wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Model, Number of Teeth, and Bore Diameter \u0026amp; Amount above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"06B-1 \/ 3\/8\" \/ 15 Teeth \/ 12 mm \u0026 1 PCS","offer_id":52423394230546,"sku":"GYJLTGFCD00056x1","price":16.44,"currency_code":"USD","in_stock":true},{"title":"06B-1 \/ 3\/8\" \/ 15 Teeth \/ 14 mm \u0026 1 PCS","offer_id":52423394263314,"sku":"GYJLTGFCD00057x1","price":17.19,"currency_code":"USD","in_stock":true},{"title":"06B-1 \/ 3\/8\" \/ 15 Teeth \/ 18 mm \u0026 1 PCS","offer_id":52423394296082,"sku":"GYJLTGFCD00058x1","price":17.19,"currency_code":"USD","in_stock":true},{"title":"06B-1 \/ 3\/8\" \/ 15 Teeth \/ 25 mm \u0026 1 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