{"product_id":"1kg-high-precision-bearing-steel-balls-3mm-19-844mm","title":"1kg High-Precision Bearing Steel Balls Solid Bearings Ball Diameter 3mm-19.844mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eHigh-Precision Bearing Steel Balls — Solid Chrome Steel, 3mm to 19.844mm, 1kg Per Order\u003c\/h2\u003e\n\u003cp\u003eEngineers, maintenance technicians, and equipment builders who need reliable rolling elements often struggle to source bearing steel balls in exact metric and inch-fraction sizes without ordering large minimum quantities. These high-precision bearing steel balls are sold by the kilogram, giving you the flexibility to stock only what you need across 35 available diameters.\u003c\/p\u003e\n\u003cp\u003eEach ball is machined from through-hardened chrome steel (GCr15 \/ 52100 equivalent), delivering consistent roundness and surface finish across the full diameter range of 3mm to 19.844mm (approximately 0.118 in to 0.781 in). Sold as 1kg per variant, actual piece count varies by diameter — smaller balls yield more pieces per kilogram.\u003c\/p\u003e\n\u003cp\u003eTypical applications include replacement rolling elements in deep-groove ball bearings, check-valve seats in hydraulic and pneumatic systems, precision jigs and fixtures, and load-distribution components in linear motion assemblies. Whether you are rebuilding industrial bearing steel ball assemblies or prototyping a custom valve body, these balls provide the dimensional accuracy required for interference-fit and clearance-fit installations.\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 deep-groove, angular-contact, and thrust bearing housings. Verify bore diameter and grade tolerance (typically G10–G100) against your application before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Bearing Steel Balls\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003e35 Diameter Options\u003c\/strong\u003e — Covers metric sizes from 3mm to 19.844mm and common inch-fraction equivalents (e.g., 3.175mm = 1\/8 in, 6.35mm = 1\/4 in, 9.525mm = 3\/8 in, 19.05mm = 3\/4 in), reducing the need for multiple suppliers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eThrough-Hardened Chrome Steel\u003c\/strong\u003e — Made from GCr15 \/ AISI 52100 equivalent bearing steel, hardened throughout the cross-section for uniform load-bearing capacity and resistance to surface fatigue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eControlled Roundness \u0026amp; Surface Finish\u003c\/strong\u003e — Manufactured to tight sphericity tolerances, ensuring smooth rolling action and minimal vibration in rotating assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Surface\u003c\/strong\u003e — Bright polished finish reduces surface oxidation during storage and handling; suitable for use with standard bearing lubricants and greases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eSold by Weight (1kg Per Order)\u003c\/strong\u003e — Consistent 1kg packaging lets you calculate piece counts by diameter and order exactly the quantity your project requires without excess waste.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eBroad Application Range\u003c\/strong\u003e — Used as replacement rolling elements in ball bearings, check-valve balls, precision tooling, and load-transfer components across industrial, hydraulic, and mechanical engineering contexts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Bearing Steel Balls\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eChrome steel (GCr15 \/ AISI 52100 equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e3mm – 19.844mm (approx. 0.118 in – 0.781 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Diameters\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePackage Weight\u003c\/th\u003e\n\u003ctd\u003e1 kg per order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePiece Count per kg\u003c\/th\u003e\n\u003ctd\u003eSee variant options (varies by diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eBright polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eTypically 60–66 HRC (through-hardened)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSphericity Tolerance Grade\u003c\/th\u003e\n\u003ctd\u003eTypically G10–G100; contact us to confirm for specific diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eModerate; suitable for use with standard bearing lubricants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eBall bearings, check valves, precision jigs, linear motion components\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 replacement?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the bore diameter of your bearing housing and the existing ball diameter using a micrometer or caliper. Match the measured diameter to the closest available size in the variant list. For interference-fit applications, verify the grade tolerance (G10–G100) against your bearing manufacturer's specification. If you are unsure, contact us to confirm compatibility before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the load capacity of these bearing steel balls?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eLoad capacity depends on the diameter, the number of balls in the assembly, and the bearing design. These balls are made from through-hardened chrome steel (GCr15 \/ AISI 52100 equivalent) with a typical hardness of 60–66 HRC, which is consistent with standard industrial bearing ball specifications. For precise dynamic and static load ratings, refer to your bearing assembly's datasheet or contact us with your application details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls corrosion-resistant for use in wet or humid environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eChrome steel bearing balls offer moderate corrosion resistance and perform well in dry or lightly lubricated environments. For applications exposed to water, chemicals, or high humidity, consider applying a compatible bearing grease or lubricant to the ball surface. If your application requires higher corrosion resistance, stainless steel balls may be more appropriate — contact us to discuss alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the diameters available in both metric and inch-fraction sizes?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The range includes both metric sizes (e.g., 3mm, 4mm, 5mm, 6mm, 8mm, 10mm) and inch-fraction equivalents expressed in millimeters (e.g., 3.175mm = 1\/8 in, 6.35mm = 1\/4 in, 9.525mm = 3\/8 in, 12.7mm = 1\/2 in, 19.05mm = 3\/4 in). Select the diameter from the variant dropdown that matches your application's specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many balls will I receive per 1kg order?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePiece count per kilogram varies by diameter — smaller balls are lighter, so you receive more pieces per kilogram. For example, 3mm balls yield significantly more pieces per kg than 19mm balls. If you need an estimated piece count for a specific diameter before ordering, contact us and we will provide the approximate quantity based on the steel density and ball volume.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these balls be used in check valves or hydraulic systems?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Solid chrome steel balls are commonly used as check-valve seats in hydraulic and pneumatic systems where a hard, dimensionally accurate ball is required to seal against a valve seat. Ensure the ball diameter matches the valve seat specification and that the operating fluid is compatible with chrome steel. For aggressive chemical environments, consult your system designer before use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between G10 and G100 grade, and which should I choose?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGrade numbers (G10, G25, G100, etc.) refer to the sphericity and surface roughness tolerance of the ball — a lower number indicates tighter tolerances. G10 balls are used in high-precision spindle bearings and measuring instruments, while G100 balls are suitable for general industrial bearings and valve applications. If your application does not specify a grade, G25–G100 is typically adequate for standard bearing replacements. Contact us to confirm the grade available for your selected diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Diameter(mm) and Weight above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"13.5mm \/ 1kg","offer_id":52409786597650,"sku":"GLFBTXJ2024GANGZHU4205x1","price":128.7,"currency_code":"USD","in_stock":true},{"title":"14.288mm \/ 1kg","offer_id":52409786630418,"sku":"GLFBTXJ2024GANGZHU4206x1","price":128.7,"currency_code":"USD","in_stock":true},{"title":"15.081mm \/ 1kg","offer_id":52409786663186,"sku":"GLFBTXJ2024GANGZHU4207x1","price":128.7,"currency_code":"USD","in_stock":true},{"title":"15.875mm \/ 1kg","offer_id":52409786695954,"sku":"GLFBTXJ2024GANGZHU4208x1","price":128.7,"currency_code":"USD","in_stock":true},{"title":"16.669mm \/ 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