{"product_id":"carbon-steel-balls-bicycle-loose-balls-bearings","title":"Carbon Steel Balls Bicycle Loose Balls Bearings 1\/4\", 7\/32\", 5\/32\", 3\/16\", 1\/8\"","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eCarbon Steel Loose Ball Bearings — Consistent Roundness for Smooth Rolling\u003c\/h2\u003e\n\u003cp\u003eWhen a worn headset, bottom bracket, or wheel hub starts introducing drag and play into your ride, the culprit is often degraded or undersized loose balls. Cyclists, mechanics, and DIY equipment builders who need an exact replacement or a bulk supply of carbon steel balls will find this listing covers the widest practical size range in a single place.\u003c\/p\u003e\n\u003cp\u003eThese carbon steel loose ball bearings are available in metric diameters from φ1mm (≈0.039\") up to φ13mm (≈0.512\"), as well as common imperial sizes including 1\/8\", 3\/16\", 7\/32\", and 1\/4\". Each ball is manufactured from carbon steel, offering a balance of hardness and toughness suited to radial and thrust load applications. Quantity options run from a single sample piece through 50, 100, 200, and 500-piece packs.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include bicycle headset and bottom bracket repacking, wheel hub servicing, small machinery and skateboard bearing replacement, and prototype or hobby mechanical assemblies requiring carbon steel loose ball bearings in precise metric or imperial 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 Note:\u003c\/strong\u003e Match the ball diameter exactly to your bearing race groove. Measure your existing balls with a micrometer before ordering. Both metric (φ1–13mm) and imperial (1\/8\", 3\/16\", 7\/32\", 1\/4\") sizes are available — select the correct Size option above.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Carbon Steel Loose Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e\u003cbr\u003eHardened carbon steel provides the surface hardness needed to resist deformation under radial and axial loads in bicycle and light machinery applications.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Size Range — φ1mm to φ13mm\u003c\/strong\u003e\u003cbr\u003eCovers the most common metric diameters plus imperial standards (1\/8\", 3\/16\", 7\/32\", 1\/4\"), reducing the need to source from multiple suppliers.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eConsistent Spherical Tolerance\u003c\/strong\u003e\u003cbr\u003eUniform roundness across the batch ensures even load distribution within the race, reducing vibration and extending race life.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🚲\u003c\/span\u003e\u003cstrong\u003eBicycle Bearing Compatible\u003c\/strong\u003e\u003cbr\u003eSized to fit standard cup-and-cone headsets, bottom brackets, and wheel hubs that use loose ball retainer or caged configurations.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\u003cbr\u003eOrder a single sample to verify fit, or choose 50, 100, 200, or 500-piece packs for workshop stock or bulk repacking jobs.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eBroad Application Compatibility\u003c\/strong\u003e\u003cbr\u003eSuitable for bicycles, inline skates, small conveyor systems, hobby robotics, and any application requiring carbon steel loose ball bearings in standard diameters.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Carbon Steel Loose Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\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\u003eDiameter Range (Metric)\u003c\/th\u003e\n\u003ctd\u003eφ1mm – φ13mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range (Imperial)\u003c\/th\u003e\n\u003ctd\u003e1\/8\", 3\/16\", 7\/32\", 1\/4\" (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 50 \/ 100 \/ 200 \/ 500 pcs (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCondition\u003c\/th\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eBicycle headsets, bottom brackets, wheel hubs, light machinery, hobby assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoad Type\u003c\/th\u003e\n\u003ctd\u003eRadial and thrust (light to moderate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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 correct ball diameter for my bicycle bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eRemove one existing ball from the bearing race and measure its diameter with a digital micrometer or caliper. Match that measurement to the closest size in the variant list. For cup-and-cone bicycle bearings, common sizes are 1\/4\" (6.35mm) for front hubs, 3\/16\" (4.76mm) for rear hubs and headsets, and 1\/8\" (3.175mm) for some older headsets. When in doubt, measure — do not estimate by eye.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls hardened enough for bicycle bearing use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel balls used in bearing applications are typically hardened to resist surface fatigue under rolling contact stress. These balls are suited to the moderate loads found in bicycle headsets, bottom brackets, and wheel hubs. For high-speed industrial spindle bearings or heavy radial loads, chrome steel (52100) balls are generally preferred. If you need hardness certification data, please contact us to confirm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill carbon steel balls rust if exposed to water?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel is susceptible to surface oxidation when exposed to moisture without a protective coating or grease. For bicycle applications, always pack the bearing race with a water-resistant grease before installation. If you ride in wet conditions frequently, consider regreasing more often. For environments with continuous water exposure, stainless steel balls may be a better long-term choice — contact us to confirm availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I mix balls of different sizes in the same bearing race?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. All balls in a single bearing race must be the same diameter. Mixing sizes creates uneven load distribution, accelerates race wear, and introduces play and vibration. If you are unsure of the correct size, measure all existing balls and replace the full set with balls of the same measured diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many balls do I need to repack a bicycle headset or hub?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe number varies by component. A typical threaded headset uses 11–22 balls per race (top and bottom), while a standard front hub uses 9–10 balls per side and a rear hub uses 9–11 balls per side. Count the balls removed from your bearing before ordering, then add 10–20% extra to account for any that are damaged or lost. The 50-piece pack is usually sufficient for a full headset repack; the 100-piece pack covers a complete hub service.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre imperial and metric sizes interchangeable?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eOnly when the dimensions match exactly. For example, 1\/4\" equals 6.35mm and φ6.35mm balls are interchangeable. However, φ6mm and 1\/4\" are not interchangeable — the 0.35mm difference will cause improper fit and accelerated wear. Always verify the exact diameter before substituting a metric size for an imperial one or vice versa.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between loose balls and caged (retainer) bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eLoose balls sit directly in the cup-and-cone race without a retainer, allowing more balls to fill the race and increasing load capacity. Caged bearings hold balls in a fixed retainer ring, making installation easier and preventing ball drop-out during assembly. Most traditional threaded bicycle headsets and cup-and-cone hubs use loose balls. Cartridge bearings (sealed units) are a separate category and are not compatible with loose ball replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your 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":"New \/ φ1mm \/ 1Pcs Samples","offer_id":52410091307282,"sku":"GYZSYJSSYX0214x50","price":2.69,"currency_code":"USD","in_stock":true},{"title":"New \/ φ1.5mm \/ 50Pcs","offer_id":52410091340050,"sku":"GYZSYJSSYX0215x50","price":4.87,"currency_code":"USD","in_stock":true},{"title":"New \/ φ2mm \/ 50Pcs","offer_id":52410091372818,"sku":"GYZSYJSSYX0216x50","price":5.14,"currency_code":"USD","in_stock":true},{"title":"New \/ φ2.5mm \/ 50Pcs","offer_id":52410091405586,"sku":"GYZSYJSSYX0217x50","price":5.14,"currency_code":"USD","in_stock":true},{"title":"New \/ φ3mm \/ 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