{"product_id":"carbon-steel-g100-ball-bearings-precision-steel-balls-3-19mm-1kg","title":"1Kg Ball Bearings Carbon Steel G100 Grade Precision Small Steel Ball 3.0-19.05mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eCarbon Steel G100 Precision Steel Balls — Consistent Roundness for Bearings, Valves \u0026amp; Machinery\u003c\/h2\u003e\n\u003cp\u003eWhen a worn bearing seat, a leaking valve seat, or a DIY linear-motion build demands a replacement ball that fits exactly right, even a 0.01 mm deviation causes noise, premature wear, or seal failure. Machinists, maintenance technicians, and serious home-shop builders who need a reliable source of precision-grade steel balls in bulk will find this listing covers the widest diameter range in a single SKU family.\u003c\/p\u003e\n\u003cp\u003eEach order contains 1 kg of carbon steel (Q235) precision balls manufactured to ABEC G100 grade. Diameters span 3.0 mm (approx. 0.118 in) through 19.05 mm (approx. 0.750 in), with grain counts per kilogram ranging from approximately 9,080 grains at 3.0 mm down to approximately 35 grains at 19.05 mm. Select your exact diameter from the variant options above.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include replacement rolling elements in radial ball bearings, check-ball seats in hydraulic and pneumatic valves, load-distribution balls in drawer slides and linear guides, and ballast or grinding media in small-scale laboratory or workshop equipment. Long-tail applications such as \"bulk steel balls for bearing repair\" and \"G100 carbon steel balls for valve seats\" are well served by the tight G100 roundness tolerance of this product.\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 These balls are designed for standard radial bearing bores, valve seats, and linear-guide channels that accept carbon steel rolling elements. Verify your bore diameter and material compatibility before ordering. For corrosive or food-contact environments, consider stainless steel alternatives.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These G100 Carbon Steel Precision Balls\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eG100 Grade Roundness\u003c\/strong\u003e — Manufactured to ABEC G100 tolerance, ensuring consistent diameter and sphericity for smooth, low-vibration rolling in bearing and valve applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Diameter Range\u003c\/strong\u003e — 39 size options from 3.0 mm to 19.05 mm (approx. 0.118\"–0.750\") in a single product family, covering metric and inch-fraction standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eSold by Weight (1 kg)\u003c\/strong\u003e — Bulk 1 kg packing with approximate grain count listed per variant, so you know exactly how many balls you receive before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eCarbon Steel (Q235) Construction\u003c\/strong\u003e — Q235 carbon steel offers a practical balance of hardness, machinability, and cost-effectiveness for general-purpose mechanical applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\u003cstrong\u003eBroad Application Fit\u003c\/strong\u003e — Suitable for radial ball bearings, hydraulic check valves, drawer slides, linear guides, and small grinding or ballast uses in workshop settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eBulk-Friendly Packaging\u003c\/strong\u003e — Packed to protect surface finish during transit; grain counts are approximate (±2%) due to natural weight variation between individual balls.\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 Precision Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon Steel (Q235)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003ctd\u003eG100 (ABEC equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e3.0 mm – 19.05 mm (approx. 0.118\" – 0.750\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter (selected)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Weight\u003c\/th\u003e\n\u003ctd\u003e1 kg per order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApproximate Grain Count\u003c\/th\u003e\n\u003ctd\u003eSee variant options (35 – 9,080 grains\/kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSmooth, bright steel finish\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\u003eRoundness Tolerance\u003c\/th\u003e\n\u003ctd\u003eG100 grade (≤ 0.025 mm deviation, typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eLow (carbon steel; not recommended for wet or corrosive environments without additional protection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eRadial ball bearings, valve seats, linear guides, grinding media\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 diameter for my bearing or valve?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the bore or seat diameter of your existing bearing or valve using a digital caliper. The ball diameter should match the original specification exactly — even a 0.05 mm mismatch can cause excessive play or binding. Cross-reference your bearing's part number (e.g., 608, 6200) with its rolling-element diameter in the manufacturer's datasheet, then select the matching variant above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does G100 grade mean, and is it sufficient for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eG100 is an ABEC-equivalent precision grade indicating that the ball's diameter deviation and sphericity error are within 0.025 mm. This is suitable for general-purpose bearings, valve seats, linear guides, and most DIY machinery. For ultra-high-speed spindles or precision instruments requiring tighter tolerances (G10–G25), a higher grade may be needed. Contact us to confirm suitability for critical applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls corrosion-resistant? Can I use them in wet or outdoor environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCarbon steel (Q235) has low inherent corrosion resistance. In dry, indoor environments these balls perform well. For wet, humid, or chemically exposed environments, surface rust can develop over time. If corrosion resistance is required, consider stainless steel ball alternatives. Applying a light machine oil coating can extend service life in mildly damp conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many balls will I receive in a 1 kg order?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe approximate grain count is listed in each variant name (e.g., \"3.0 mm — approx. 9,080 grains\"). These counts are based on average ball weight and may vary by ±2% due to natural manufacturing tolerances. If you need a precise count for a specific project, we recommend ordering slightly more than your calculated requirement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these steel balls be used as grinding media in a ball mill?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, carbon steel balls are commonly used as grinding media in small laboratory or workshop ball mills for grinding soft to medium-hardness materials. Ensure the mill liner material is compatible with carbon steel to avoid contamination. For grinding hard ceramics or abrasive minerals, hardened steel or ceramic media may be more appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls compatible with standard bearing housings and inch-fraction dimensions?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The diameter range includes both metric sizes (e.g., 3.0, 4.0, 5.0, 6.0, 8.0 mm) and common inch-fraction equivalents (e.g., 3.175 mm = 1\/8\", 4.763 mm = 3\/16\", 6.35 mm = 1\/4\", 7.938 mm = 5\/16\", 9.525 mm = 3\/8\", 12.7 mm = 1\/2\", 19.05 mm = 3\/4\"). Select the diameter that matches your housing specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the hardness of these carbon steel balls?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eQ235 carbon steel balls typically have a surface hardness in the range of 55–62 HRC after standard heat treatment, though exact values depend on the manufacturing batch. If your application requires a specific hardness certification, please contact us to confirm before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your diameter and packing quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"Carbon steel (Q235) \/ 3.0mm \/ 1kg 【app. 9080 grains】","offer_id":52410412040466,"sku":"LFL2024GANGZHU2235x1","price":101.43,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 3.175mm \/ 1kg 【app. 7660 grains】","offer_id":52410412073234,"sku":"LFL2024GANGZHU2236x1","price":101.43,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 3.5mm \/ 1kg 【app. 5718 grains】","offer_id":52410412106002,"sku":"LFL2024GANGZHU2237x1","price":98.87,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 3.75mm \/ 1kg 【app. 4649 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grains】","offer_id":52410412302610,"sku":"LFL2024GANGZHU2243x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 5.45mm \/ 1kg 【app. 1514 grains】","offer_id":52410412335378,"sku":"LFL2024GANGZHU2244x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 5.5mm \/ 1kg 【app. 1473 grains】","offer_id":52410412368146,"sku":"LFL2024GANGZHU2245x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 5.556mm \/ 1kg 【app. 1429 grains】","offer_id":52410412400914,"sku":"LFL2024GANGZHU2246x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 5.953mm \/ 1kg 【app. 1162 grains】","offer_id":52410412433682,"sku":"LFL2024GANGZHU2247x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 5.98mm \/ 1kg 【app. 1146 grains】","offer_id":52410412466450,"sku":"LFL2024GANGZHU2248x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 6.0mm \/ 1kg 【app. 1135 grains】","offer_id":52410412499218,"sku":"LFL2024GANGZHU2249x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 6.25mm \/ 1kg 【app. 1004 grains】","offer_id":52410412531986,"sku":"LFL2024GANGZHU2250x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 6.35mm \/ 1kg 【app. 957 grains】","offer_id":52410412564754,"sku":"LFL2024GANGZHU2251x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 6.5mm \/ 1kg 【app. 892 grains】","offer_id":52410412597522,"sku":"LFL2024GANGZHU2252x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 6.747mm \/ 1kg 【app. 798 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grains】","offer_id":52410412794130,"sku":"LFL2024GANGZHU2258x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 7.5mm \/ 1kg 【app. 581 grains】","offer_id":52410412826898,"sku":"LFL2024GANGZHU2259x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 7.938mm \/ 1kg 【app. 490 grains】","offer_id":52410412859666,"sku":"LFL2024GANGZHU2260x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 7.95mm \/ 1kg 【app. 487 grains】","offer_id":52410412892434,"sku":"LFL2024GANGZHU2261x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 7.96mm \/ 1kg 【app. 486 grains】","offer_id":52410412925202,"sku":"LFL2024GANGZHU2262x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 7.97mm \/ 1kg 【app. 484 grains】","offer_id":52410412957970,"sku":"LFL2024GANGZHU2263x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 7.98mm \/ 1kg 【app. 482 grains】","offer_id":52410412990738,"sku":"LFL2024GANGZHU2264x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 7.99mm \/ 1kg 【app. 480 grains】","offer_id":52410413023506,"sku":"LFL2024GANGZHU2265x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 8.0mm \/ 1kg 【app. 478 grains】","offer_id":52410413056274,"sku":"LFL2024GANGZHU2266x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 8.01mm \/ 1kg 【app. 477 grains】","offer_id":52410413089042,"sku":"LFL2024GANGZHU2267x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 8.02mm \/ 1kg 【app. 475 grains】","offer_id":52410413121810,"sku":"LFL2024GANGZHU2268x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 8.03mm \/ 1kg 【app. 473 grains】","offer_id":52410413154578,"sku":"LFL2024GANGZHU2269x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 9.525mm \/ 1kg 【app. 283 grains】","offer_id":52410413187346,"sku":"LFL2024GANGZHU2270x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 12.7mm \/ 1kg 【app. 119 grains】","offer_id":52410413220114,"sku":"LFL2024GANGZHU2271x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 14.0mm \/ 1kg 【app. 89 grains】","offer_id":52410413252882,"sku":"LFL2024GANGZHU2272x1","price":96.15,"currency_code":"USD","in_stock":true},{"title":"Carbon steel (Q235) \/ 19.05mm \/ 1kg 【app. 35 grains】","offer_id":52410413285650,"sku":"LFL2024GANGZHU2273x1","price":96.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-05_55f86765-f74f-40bd-a1d8-f1c0d24fd9f3.jpg?v=1782440931","url":"https:\/\/homediyer.com\/products\/carbon-steel-g100-ball-bearings-precision-steel-balls-3-19mm-1kg","provider":"HomeDIYer","version":"1.0","type":"link"}