{"product_id":"1kg-carbon-steel-ball-bearings-2-0-8-0mm-smooth-rebound","title":"1 Kg 2.0-8.0 MM Steel Balls\/Balls, Carbon Steel Ball Bearings, Smooth Rebound","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eCarbon Steel Ball Bearings 2.0–8.0mm — Consistent Roundness for Every Mechanical Application\u003c\/h2\u003e\n\u003cp\u003eWhen a loose ball bearing causes a seized bearing race, a sticking valve, or an uneven rolling surface, the root cause is almost always inconsistent diameter tolerance or poor surface finish. Machinists, hobbyists, and maintenance engineers who need reliable rolling elements — whether for bearing replacement, ball screw assemblies, or precision jigs — require steel balls that hold their stated diameter and deliver repeatable rebound every time.\u003c\/p\u003e\n\u003cp\u003eThis listing covers a 1 kg quantity of carbon steel ball bearings available in 20 size options ranging from 2.0mm (approx. 0.079 in) to 8.0mm (approx. 0.315 in). Each ball is manufactured from carbon steel, offering a balance of hardness and toughness suited to moderate-load rolling and sliding contact applications. Surface finish is smooth and consistent across the batch, supporting low-friction operation in dry or lightly lubricated environments.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include replacement rolling elements in deep-groove ball bearings, load-distributing media in vibration finishing and tumbling machines, and precision spacers or detent balls in mechanical assemblies. Long-tail applications include DIY linear rail projects, catapult and slingshot ammunition for hobbyists, and decorative metalwork where uniform spheres are required.\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 Suitable for standard bearing housings, ball screw assemblies, tumbling media applications, and general mechanical use. Verify bore diameter and load rating against your specific application before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Carbon Steel Ball Bearings\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eWide Size Range (2.0–8.0mm)\u003c\/strong\u003e — 20 diameter options in a single listing let you source the exact rolling element size your bearing housing or assembly requires, from fine 2.0mm balls up to robust 8.0mm spheres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e \u003cstrong\u003e1 kg Bulk Quantity\u003c\/strong\u003e — Sold by weight rather than piece count, giving you a practical stock quantity for maintenance kits, batch replacements, or tumbling media top-ups without over-ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e — Carbon steel provides the hardness needed to resist deformation under rolling contact loads while remaining machinable and cost-effective compared to stainless or chrome alloy alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eSmooth Rebound Performance\u003c\/strong\u003e — Consistent sphericity and surface finish deliver predictable rebound characteristics, important for valve seats, detent mechanisms, and any application where ball return force matters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eUniform Surface Finish\u003c\/strong\u003e — Each ball is finished to a smooth surface, reducing friction and wear on mating surfaces in dry or lightly lubricated contact conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eVersatile Application Range\u003c\/strong\u003e — From bearing replacement and linear motion systems to vibration finishing media and hobbyist projects, these balls cover a broad spectrum of rolling element needs in one convenient size-selectable listing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Carbon Steel 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\u003c\/th\u003e\n\u003ctd\u003e2.0mm – 8.0mm (approx. 0.079 in – 0.315 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e2.0 \/ 2.5 \/ 3.0 \/ 3.5 \/ 4.0 \/ 4.5 \/ 4.8 \/ 5.0 \/ 5.5 \/ 5.90 \/ 5.95 \/ 6.0 \/ 6.5 \/ 6.90 \/ 6.95 \/ 7.0 \/ 7.5 \/ 7.90 \/ 7.95 \/ 8.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSmooth (ground)\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\u003eGrade \/ Tolerance\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish \/ Coating\u003c\/th\u003e\n\u003ctd\u003eBare carbon steel (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Use\u003c\/th\u003e\n\u003ctd\u003eBearing replacement, tumbling media, detent balls, linear motion, DIY mechanical assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eModerate — apply light oil for storage in humid environments\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 ball diameter for my bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCheck the bearing manufacturer's datasheet for the rolling element diameter specification. Match that figure to the size option in this listing. If your bearing uses imperial sizing, convert: for example, 1\/4 inch ≈ 6.35mm — in that case, select the nearest metric size or contact us to confirm availability of closer tolerances.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls strong enough for load-bearing mechanical applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel ball bearings are suitable for moderate radial and axial loads in standard bearing housings and ball screw assemblies. They are not recommended for high-impact or heavy shock-load applications where hardened chrome steel (52100) or ceramic balls would be more appropriate. For light-to-medium duty use, carbon steel performs reliably.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these rust if stored or used in a damp environment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel is susceptible to surface oxidation in humid or wet conditions. For storage, apply a thin coat of machine oil or anti-rust spray. For applications exposed to moisture, consider stainless steel ball bearings instead. In dry or lightly lubricated environments, carbon steel performs well without additional treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these as tumbling or vibratory finishing media?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Steel balls are commonly used as burnishing media in rotary and vibratory tumblers to polish and work-harden metal parts. The 1 kg bulk quantity is practical for topping up existing media loads. Select a ball diameter appropriate to the part geometry — smaller balls (2.0–4.0mm) reach tighter recesses, while larger balls (5.0–8.0mm) provide more mass per piece for faster burnishing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many balls are included in 1 kg?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe piece count varies significantly by diameter. As a rough guide: 2.0mm balls yield approximately 15,000–18,000 pieces per kg, while 8.0mm balls yield approximately 250–300 pieces per kg. If you need an exact count for a specific size, contact us before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these compatible with standard bearing housings sold in the US and EU?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese balls are sized in metric millimeters, which aligns with ISO-standard bearing housings used globally including US and EU markets. Always verify the rolling element diameter in your bearing's specification sheet. For imperial-sized bearings, use a conversion chart and select the closest available metric size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the closely spaced sizes like 5.90mm, 5.95mm, and 6.0mm?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese near-identical sizes exist because some bearing standards specify non-round metric values for rolling elements. The 0.05mm difference matters in precision applications where the bearing race is machined to a tight tolerance. For general-purpose use, 6.0mm is the standard choice. Select 5.90mm or 5.95mm only if your bearing datasheet explicitly calls for that diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your ball diameter (SIZE) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"2.0MM","offer_id":52409680265490,"sku":"JFDC-DG-SMZC0006-0x1","price":70.52,"currency_code":"USD","in_stock":true},{"title":"2.5MM","offer_id":52409680298258,"sku":"JFDC-DG-SMZC0006-1x1","price":69.46,"currency_code":"USD","in_stock":true},{"title":"3.0MM","offer_id":52409680331026,"sku":"JFDC-DG-SMZC0006-2x1","price":66.27,"currency_code":"USD","in_stock":true},{"title":"3.5MM","offer_id":52409680363794,"sku":"JFDC-DG-SMZC0006-3x1","price":65.74,"currency_code":"USD","in_stock":true},{"title":"4.0MM","offer_id":52409680396562,"sku":"JFDC-DG-SMZC0006-4x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"4.5MM","offer_id":52409680429330,"sku":"JFDC-DG-SMZC0006-5x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"4.8MM","offer_id":52409680462098,"sku":"JFDC-DG-SMZC0006-6x1","price":66.27,"currency_code":"USD","in_stock":true},{"title":"5.0MM","offer_id":52409680494866,"sku":"JFDC-DG-SMZC0006-7x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"5.5MM","offer_id":52409680527634,"sku":"JFDC-DG-SMZC0006-8x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"5.90MM","offer_id":52409680560402,"sku":"JFDC-DG-SMZC0006-9x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"5.95MM","offer_id":52409680593170,"sku":"JFDC-DG-SMZC0006-10x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"6.0MM","offer_id":52409680625938,"sku":"JFDC-DG-SMZC0006-11x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"6.5MM","offer_id":52409680658706,"sku":"JFDC-DG-SMZC0006-12x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"6.90MM","offer_id":52409680691474,"sku":"JFDC-DG-SMZC0006-13x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"6.95MM","offer_id":52409680724242,"sku":"JFDC-DG-SMZC0006-14x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"7.0MM","offer_id":52409680757010,"sku":"JFDC-DG-SMZC0006-15x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"7.5MM","offer_id":52409680789778,"sku":"JFDC-DG-SMZC0006-16x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"7.90MM","offer_id":52409680822546,"sku":"JFDC-DG-SMZC0006-17x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"7.95MM","offer_id":52409680855314,"sku":"JFDC-DG-SMZC0006-18x1","price":65.21,"currency_code":"USD","in_stock":true},{"title":"8.0MM","offer_id":52409680888082,"sku":"JFDC-DG-SMZC0006-19x1","price":65.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of10_4ec472e9-d8ff-472d-bd52-b96fd3c3dca1.jpg?v=1782551033","url":"https:\/\/homediyer.com\/products\/1kg-carbon-steel-ball-bearings-2-0-8-0mm-smooth-rebound","provider":"HomeDIYer","version":"1.0","type":"link"}