{"product_id":"gcr15-precision-hardened-bearing-steel-ball-41-50mm-cnc-industrial","title":"GCR15 Hardened Precision Steel Ball 41–50mm | CNC Industrial","description":"\n\u003ch2\u003eGCR15 Precision Hardened Bearing Steel Ball – 41mm to 50mm\u003c\/h2\u003e\n\u003cp\u003eMeet the industrial-grade GCR15 (G60) solid bearing steel ball engineered for demanding applications. Machined to tight tolerances and hardened to HRC 60–63, this high-precision steel ball delivers exceptional durability and dimensional accuracy whether you're working in a CNC setup, running impact tests, or requiring exact-size spheres for mechanical assemblies.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e GCR15 Bearing Steel (Chrome Steel) – Grade G60\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range:\u003c\/strong\u003e 41mm – 50.8mm diameter (multiple sizes available)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e Approximately HRC 60–63 for outstanding wear resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Precision:\u003c\/strong\u003e Tight dimensional tolerances suitable for CNC machinery and industrial detection pipelines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Use:\u003c\/strong\u003e Grinding, machine installation, laboratory experiments, pipeline inspection, and industrial ball applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSold as:\u003c\/strong\u003e 1 piece per order\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable:\u003c\/strong\u003e Available for custom orders — contact us for specific size requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReference Weight Chart\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse; width:100%; max-width:400px;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background:#f2f2f2;\"\u003e\n      \u003cth style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eDiameter\u003c\/th\u003e\n      \u003cth style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eApprox. Weight\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e41mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~280g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e41.275mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~290g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e42mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~300g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e42.863mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~320g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e44mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~350g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e44.45mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~358g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e45mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~370g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e46mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~400g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e47mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~425g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e47.625mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~440g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e48mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~450g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e49mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~480g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e49.2mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~485g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e49.5mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~500g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e50mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~510g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e50.8mm\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e~535g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Actual weight may vary by ±0.2g per ball.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eImportant Usage Note\u003c\/h3\u003e\n\u003cp\u003eGCR15 bearing steel is not inherently waterproof or rust-resistant. Store in a dry environment and apply a light coating of oil when not in use to maintain surface quality.\u003c\/p\u003e\n\n\u003ch3\u003eGym \/ Hand Exercise Ball\u003c\/h3\u003e\n\u003cp\u003eWant to use this solid steel ball as a hand or grip exercise ball? Simply leave us a message at checkout and we'll include a gift bag free of charge!\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-20mm-diamond-flat-grinding-wheel-dry-and-wet-use-heavy-duty-concrete-grinder-wheel-blue-vacuum-brazed\"\u003e10\/20mm Diamond Flat Grinding Wheel – Dry and Wet Use Heavy Duty\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-durable-gold-blade-nut-metal-universal-trimmer-accessories-anti-loosening-line-left-hand-thread-replacement-parts-1\"\u003e10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What material is the GCR15 precision steel ball made from?\u003c\/h4\u003e\n\u003cp\u003eA: The ball is made from GCR15 chrome bearing steel, a high-carbon chromium alloy steel widely used in precision industrial applications. It is hardened to approximately HRC 60–63, providing excellent wear resistance and dimensional stability.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What are the common uses for this hardened bearing steel ball?\u003c\/h4\u003e\n\u003cp\u003eA: This precision steel ball is suitable for a wide range of industrial and mechanical uses including CNC machine setups, grinding operations, impact testing, laboratory experiments, pipeline inspection\/detection, hand grip exercise, and general industrial ball applications where high hardness and accurate dimensions are required.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this steel ball rust or corrode?\u003c\/h4\u003e\n\u003cp\u003eA: GCR15 bearing steel is not inherently rust-proof or waterproof. To preserve the surface finish and dimensional accuracy, keep the ball in a dry location and apply a thin coat of protective oil when storing or not in active use.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many pieces are included per order?\u003c\/h4\u003e\n\u003cp\u003eA: Each order includes 1 piece (1pc per lot). The listing image is for reference only. If you require multiple pieces or a custom size, please contact us directly.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What material is the GCR15 precision steel ball made from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The ball is made from GCR15 chrome bearing steel, a high-carbon chromium alloy steel widely used in precision industrial applications. It is hardened to approximately HRC 60–63, providing excellent wear resistance and dimensional stability.\"}}, {\"@type\": \"Question\", \"name\": \"What are the common uses for this hardened bearing steel ball?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This precision steel ball is suitable for a wide range of industrial and mechanical uses including CNC machine setups, grinding operations, impact testing, laboratory experiments, pipeline inspection\/detection, hand grip exercise, and general industrial ball applications where high hardness and accurate dimensions are required.\"}}, {\"@type\": \"Question\", \"name\": \"Does this steel ball rust or corrode?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"GCR15 bearing steel is not inherently rust-proof or waterproof. To preserve the surface finish and dimensional accuracy, keep the ball in a dry location and apply a thin coat of protective oil when storing or not in active use.\"}}, {\"@type\": \"Question\", \"name\": \"How many pieces are included per order?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each order includes 1 piece (1pc per lot). The listing image is for reference only. 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