{"product_id":"05b-5-16-steel-roller-chain-sprocket-wheel-pitch-8mm-10-40-teeth-process-hole","title":"05B 5\/16\" Steel Roller Chain Sprocket Wheel Pitch 8mm 10~40 Teeth Process Hole","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e05B Roller Chain Sprocket Wheel — Reliable 8mm Pitch Drive for DIY \u0026amp; Industrial Use\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or mismatched sprocket causes chain skip, premature wear, or unexpected downtime, finding an exact-fit replacement becomes urgent. Whether you are a maker building a custom drive system, a technician maintaining conveyor equipment, or a cyclist upgrading a vintage bike, this 05B roller chain sprocket wheel gives you a direct-fit solution across a wide tooth range without the lead time of custom machining.\u003c\/p\u003e\n\u003cp\u003eEach sprocket is machined from carbon steel and features a process hole (pilot bore) hub ready for secondary boring or keying to your shaft diameter. The 05B standard specifies an 8mm pitch (5\/16 in) and is compatible with simplex 05B roller chain. Tooth counts span 10 to 40 teeth, with outer diameters ranging from approximately 28mm (1.10 in) for the 10-tooth variant up to approximately 104mm (4.09 in) for the 40-tooth variant.\u003c\/p\u003e\n\u003cp\u003eTypical applications include small conveyor drives and indexing tables, go-kart and mini-bike final drives requiring a replacement 05B sprocket, DIY automation rigs and CNC axis drives using 8mm pitch roller chain, and light agricultural or garden machinery chain drive repairs.\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 Fits ISO 05B simplex roller chain — 8mm (5\/16 in) pitch, 3mm roller diameter, 2.31mm inner plate width.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 05B Roller Chain Sprocket Wheels\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eISO 05B Standard Compliance\u003c\/strong\u003e — Tooth profile and pitch geometry conform to ISO 606 \/ DIN 8187 for 05B simplex chain, ensuring consistent meshing and reduced chain wear across the full 10–40 tooth range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eProcess Hole (Pilot Bore) Hub\u003c\/strong\u003e — Ships with a pilot bore hub ready for secondary machining. Bore to your exact shaft diameter and add a keyway or set-screw flat for a secure, zero-slop fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e — Machined from carbon steel for the hardness and toughness needed in continuous-duty drive applications, resisting tooth deformation under cyclic load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eWide Tooth-Count Selection (10–40 Teeth)\u003c\/strong\u003e — 23 variants in a single listing let you dial in your exact drive ratio without sourcing from multiple suppliers or waiting on custom orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eConsistent Pitch Accuracy\u003c\/strong\u003e — CNC-machined tooth spacing holds tight pitch tolerances, minimising chain elongation stress and extending the service life of both the sprocket and the mating chain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧰\u003c\/span\u003e \u003cstrong\u003eVersatile Across Drive Applications\u003c\/strong\u003e — Suited for conveyors, go-karts, mini-bikes, DIY automation, and light machinery wherever an 05B simplex chain drive is specified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 05B Roller Chain Sprocket\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003eISO 05B \/ DIN 8187 Simplex\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\u003eRoller Diameter\u003c\/th\u003e\n\u003ctd\u003e3mm (0.118 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Plate Width\u003c\/th\u003e\n\u003ctd\u003e2.31mm (0.091 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e10 – 40 Teeth (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Type\u003c\/th\u003e\n\u003ctd\u003eProcess Hole (Pilot 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\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Length\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\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 tooth count for my drive?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYour drive ratio equals the driven sprocket teeth divided by the driver sprocket teeth. For example, pairing a 10-tooth driver with a 20-tooth driven sprocket gives a 2:1 reduction. Decide your target output speed or torque, then select the tooth combination that achieves it. Larger tooth counts on the driven side reduce speed and increase torque; smaller counts do the opposite.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat chain does this sprocket fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThis sprocket is designed for ISO 05B simplex roller chain with an 8mm (5\/16 in) pitch, 3mm roller diameter, and 2.31mm inner plate width. Do not use with 05B duplex or triplex chain, or with ANSI #35 chain — the pitch is similar but the roller and plate dimensions differ and will cause premature wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size does the sprocket come with, and can I machine it?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAll variants ship with a pilot bore (process hole) hub. The pilot bore is intentionally undersized so you can bore it out on a lathe to match your exact shaft diameter. You can also add a keyway or set-screw flat. Check the variant listing for the minimum and maximum bore range before ordering to confirm your shaft size is achievable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this sprocket corrosion-resistant for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe base material is carbon steel, which offers good mechanical strength but moderate corrosion resistance. For outdoor, humid, or wash-down environments, apply a chain lubricant regularly and consider a protective coating after machining. If your application demands higher corrosion resistance, contact us to confirm whether a treated or alternative-material variant is available.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I verify the sprocket will fit my existing setup before machining?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBefore boring, confirm three things: (1) your chain is ISO 05B simplex with 8mm pitch; (2) the tooth count matches your required drive ratio; (3) the outer diameter of the sprocket clears any guards or frame members in your assembly. Outer diameter increases with tooth count — refer to the variant specifications or contact us for dimensional drawings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this sprocket on a bicycle or go-kart?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 05B standard is widely used on small-displacement go-karts, mini-bikes, and some vintage or specialty bicycles that run 5\/16 in pitch chain. Verify your existing chain pitch with a ruler or chain checker tool before ordering. For standard modern bicycles using 1\/2 in pitch chain, this sprocket is not compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a process hole sprocket and a finished bore sprocket?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA finished bore sprocket is pre-machined to a specific shaft diameter and is ready to install. A process hole (pilot bore) sprocket has a smaller-than-final bore and requires secondary machining to reach your target shaft size. Process hole sprockets are more versatile because one part number covers many shaft sizes, but they require access to a lathe or machine shop for final boring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Gear Model (tooth count) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"05B 5\/16\" 10 Teeth","offer_id":52423210795282,"sku":"LXDGLBZSJ072844x1","price":5.37,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 11 Teeth","offer_id":52423210828050,"sku":"LXDGLBZSJ072845x1","price":5.64,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 12 Teeth","offer_id":52423210860818,"sku":"LXDGLBZSJ072846x1","price":6.38,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 13 Teeth","offer_id":52423210893586,"sku":"LXDGLBZSJ072847x1","price":7.68,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 14 Teeth","offer_id":52423210926354,"sku":"LXD11873x1","price":8.42,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 15 Teeth","offer_id":52423210959122,"sku":"LXDGLBZSJ072848x1","price":9.18,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 16 Teeth","offer_id":52423210991890,"sku":"LXDGLBZSJ072849x1","price":9.91,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 17 Teeth","offer_id":52423211024658,"sku":"LXDGLBZSJ072850x1","price":11.22,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 18 Teeth","offer_id":52423211057426,"sku":"LXDGLBZSJ072851x1","price":11.95,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 19 Teeth","offer_id":52423211090194,"sku":"LXDGLBZSJ072852x1","price":12.23,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 20 Teeth","offer_id":52423211122962,"sku":"LXDGLBZSJ072853x1","price":13.04,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 21 Teeth","offer_id":52423211155730,"sku":"LXDGLBZSJ072854x1","price":13.8,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 22 Teeth","offer_id":52423211188498,"sku":"LXDGLBZSJ072855x1","price":14.27,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 23 Teeth","offer_id":52423211221266,"sku":"LXDGLBZSJ072856x1","price":14.81,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 24 Teeth","offer_id":52423211254034,"sku":"LXDGLBZSJ072857x1","price":15.57,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 25 Teeth","offer_id":52423211286802,"sku":"LXDGLBZSJ072858x1","price":16.31,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 26 Teeth","offer_id":52423211319570,"sku":"LXDGLBZSJ072859x1","price":17.12,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 27 Teeth","offer_id":52423211352338,"sku":"LXD11874x1","price":17.88,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 28 Teeth","offer_id":52423211385106,"sku":"LXDGLBZSJ072860x1","price":18.62,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 30 Teeth","offer_id":52423211417874,"sku":"LXD11875x1","price":19.16,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 32 Teeth","offer_id":52423211450642,"sku":"LXD11876x1","price":21.69,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 38 Teeth","offer_id":52423211483410,"sku":"LXD11877x1","price":27.81,"currency_code":"USD","in_stock":true},{"title":"05B 5\/16\" 40 Teeth","offer_id":52423211516178,"sku":"LXD11878x1","price":29.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/2b08b718-166b-4803-a7f8-b1034cbdf7c9_49c6e0df-5a64-4ff2-ab34-8f2bb6a53e61.jpg?v=1782641055","url":"https:\/\/homediyer.com\/products\/05b-5-16-steel-roller-chain-sprocket-wheel-pitch-8mm-10-40-teeth-process-hole","provider":"HomeDIYer","version":"1.0","type":"link"}