{"product_id":"g10-chrome-steel-precision-bearing-balls-metric","title":"Metric G10 Precision Bearing Balls Chrome Steel Loose Bearings Bulk 6.9mm - 30mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eG10 Chrome Steel Precision Bearing Balls — Metric Sizes for Demanding Applications\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or undersized ball causes vibration, noise, or premature bearing failure, finding the exact replacement diameter matters. Machinists, maintenance technicians, and DIY builders who work with metric and fractional-metric assemblies need balls that meet tight dimensional tolerances — not catalog approximations. These G10 chrome steel precision bearing balls are stocked across a wide diameter range (5.9 mm to 30 mm \/ approx. 0.232\" to 1.181\") so you can match the original spec without custom ordering.\u003c\/p\u003e\n\u003cp\u003eEach ball is manufactured from through-hardened chrome steel (GCr15 \/ 52100 equivalent) and finished to ABEC\/ISO Grade 10 tolerances. Diameter increments as fine as 0.01 mm are available, covering both standard metric sizes and fractional-inch equivalents such as 7.938 mm (5\/16\"), 15.875 mm (5\/8\"), 19.05 mm (3\/4\"), and 25.4 mm (1\"). Surface finish is smooth and consistent across the batch, supporting low-friction rolling contact.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include replacing rolling elements in deep-groove ball bearings, angular-contact bearings, and linear guides; restoring valve seats and check valves in hydraulic or pneumatic circuits; and serving as precision transfer balls in jigs, fixtures, and ball-transfer units. The 100-piece bulk packs are suited for production maintenance or repair shops that cycle through common sizes regularly.\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 Select the diameter that matches your bearing bore or seat specification exactly. G10 grade balls are suitable for standard radial and angular-contact ball bearings, check valves, and precision jigs. For applications requiring G5 or G3 tolerances, contact us to confirm suitability.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These G10 Chrome Steel Precision Bearing Balls\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eGrade 10 Dimensional Tolerance\u003c\/strong\u003e — Diameter deviation held to ±0.0025 mm (G10), ensuring consistent fit in standard bearing housings and seats without hand-fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eThrough-Hardened Chrome Steel (GCr15 \/ 52100)\u003c\/strong\u003e — Core and surface hardness typically 60–66 HRC, providing resistance to deformation under radial and axial load cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Diameter Selection: 5.9 mm – 30 mm\u003c\/strong\u003e — Covers both pure metric increments and fractional-inch equivalents (e.g., 7.938 mm = 5\/16\", 25.4 mm = 1\"), reducing the need for multiple suppliers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eSmooth Surface Finish for Low-Friction Rolling\u003c\/strong\u003e — Surface roughness Ra typically ≤0.025 µm, supporting quiet, low-vibration operation in radial bearings and linear guides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities: 1 pc or 100 pcs\u003c\/strong\u003e — Single-piece option for one-off repairs; 100-piece bulk packs for production maintenance, kitting, or stocking common replacement sizes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Surface Treatment\u003c\/strong\u003e — Balls are finished with a light anti-rust coating suitable for indoor mechanical environments; compatible with standard bearing greases and oils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — G10 Chrome Steel Bearing 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\u003eGrade\u003c\/th\u003e\n\u003ctd\u003eG10 (ISO 3290 \/ ABEC Grade 10)\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\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e5.9 mm – 30 mm (approx. 0.232\" – 1.181\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Tolerance\u003c\/th\u003e\n\u003ctd\u003e±0.0025 mm (G10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Roughness (Ra)\u003c\/th\u003e\n\u003ctd\u003eTypically ≤0.025 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRoundness Deviation\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSmooth, light anti-rust treatment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pc or 100 pcs (select above)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eRadial ball bearings, angular-contact bearings, check valves, linear guides, jigs \u0026amp; fixtures\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 determine which diameter I need?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the existing ball with a micrometer or caliper, or check the bearing manufacturer's datasheet for the rolling element diameter. For standard deep-groove ball bearings, the ball diameter is listed in the bearing's internal geometry specification. If you are replacing a fractional-inch ball (e.g., 5\/16\"), look for the metric equivalent in our size list — 7.938 mm corresponds to exactly 5\/16\".\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does G10 grade mean, and is it sufficient for my bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eG10 (Grade 10 per ISO 3290) specifies the maximum allowable deviation in diameter, sphericity, and surface roughness. It is the standard grade used in most commercial and industrial ball bearings (ABEC 1–3 equivalent). For high-speed spindles or precision instruments requiring G5 or G3 balls, contact us to confirm availability before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls compatible with standard bearing greases and oils?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Chrome steel (GCr15 \/ 52100) is compatible with all common mineral and synthetic bearing lubricants, including lithium-based greases, PAO oils, and ester-based lubricants. Avoid prolonged exposure to strong acids or chlorinated solvents, which can cause surface corrosion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these balls in outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eChrome steel balls carry a light anti-rust treatment suitable for indoor mechanical environments. For outdoor, washdown, or submerged applications, stainless steel balls (AISI 440C or 316) are recommended instead. If you need stainless options, contact us for availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the load capacity of these bearing balls?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eLoad capacity depends on the complete bearing assembly — housing, races, and ball count — not the ball alone. The through-hardened chrome steel construction (60–66 HRC) provides the material strength required for standard radial and axial loads in commercial ball bearings. For specific dynamic or static load ratings, refer to your bearing manufacturer's catalog using the ball diameter and bearing series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many balls do I need to replace in a bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIt is strongly recommended to replace all balls in a bearing at the same time, not just the damaged one. Mixing new and worn balls creates uneven load distribution, accelerating wear on the new balls and reducing bearing life. The ball count per bearing varies by series — check your bearing's datasheet or count the existing balls before ordering. The 100-piece bulk pack is ideal when servicing multiple bearings of the same size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo the fractional-inch sizes (e.g., 7.938 mm, 15.875 mm) match imperial bearing standards?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Sizes such as 7.938 mm (5\/16\"), 11.113 mm (7\/16\"), 15.875 mm (5\/8\"), 19.05 mm (3\/4\"), and 25.4 mm (1\") are the exact metric equivalents of standard inch-series ball dimensions used in imperial bearings. These are manufactured to the same G10 tolerance and are direct replacements for inch-series rolling elements.\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 Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"6.9mm \/ 100","offer_id":52410268320018,"sku":"GLFBLFF2024GANGZHU4310x100","price":18.66,"currency_code":"USD","in_stock":true},{"title":"6.95mm \/ 100","offer_id":52410268352786,"sku":"GLFBLFF2024GANGZHU4311x100","price":19.0,"currency_code":"USD","in_stock":true},{"title":"6.98mm \/ 100","offer_id":52410268385554,"sku":"GLFBLFF2024GANGZHU4312x100","price":19.0,"currency_code":"USD","in_stock":true},{"title":"7mm \/ 100","offer_id":52410268418322,"sku":"GLFBLFF2024GANGZHU4313x100","price":19.18,"currency_code":"USD","in_stock":true},{"title":"7.01mm \/ 100","offer_id":52410268451090,"sku":"GLFBLFF2024GANGZHU4314x100","price":19.18,"currency_code":"USD","in_stock":true},{"title":"7.02mm \/ 100","offer_id":52410268483858,"sku":"GLFBLFF2024GANGZHU4315x100","price":19.18,"currency_code":"USD","in_stock":true},{"title":"7.03mm \/ 100","offer_id":52410268516626,"sku":"GLFBLFF2024GANGZHU4316x100","price":19.31,"currency_code":"USD","in_stock":true},{"title":"7.04mm \/ 100","offer_id":52410268549394,"sku":"GLFBLFF2024GANGZHU4317x100","price":19.31,"currency_code":"USD","in_stock":true},{"title":"7.84mm \/ 100","offer_id":52410268582162,"sku":"GLFBLFF2024GANGZHU4318x100","price":23.27,"currency_code":"USD","in_stock":true},{"title":"7.9mm \/ 100","offer_id":52410268614930,"sku":"GLFBLFF2024GANGZHU4319x100","price":23.61,"currency_code":"USD","in_stock":true},{"title":"7.92mm \/ 100","offer_id":52410268647698,"sku":"GLFBLFF2024GANGZHU4320x100","price":23.61,"currency_code":"USD","in_stock":true},{"title":"7.938mm \/ 100","offer_id":52410268680466,"sku":"GLFBLFF2024GANGZHU4321x100","price":23.75,"currency_code":"USD","in_stock":true},{"title":"7.95mm \/ 100","offer_id":52410268713234,"sku":"GLFBLFF2024GANGZHU4322x100","price":23.75,"currency_code":"USD","in_stock":true},{"title":"7.96mm \/ 100","offer_id":52410268746002,"sku":"GLFBLFF2024GANGZHU4323x100","price":23.95,"currency_code":"USD","in_stock":true},{"title":"7.97mm \/ 100","offer_id":52410268778770,"sku":"GLFBLFF2024GANGZHU4324x100","price":23.95,"currency_code":"USD","in_stock":true},{"title":"7.98mm \/ 100","offer_id":52410268811538,"sku":"GLFBLFF2024GANGZHU4325x100","price":23.95,"currency_code":"USD","in_stock":true},{"title":"7.99mm \/ 100","offer_id":52410268844306,"sku":"GLFBLFF2024GANGZHU4326x100","price":24.09,"currency_code":"USD","in_stock":true},{"title":"8mm \/ 100","offer_id":52410268877074,"sku":"GLFBLFF2024GANGZHU4327x100","price":24.09,"currency_code":"USD","in_stock":true},{"title":"8.01mm \/ 100","offer_id":52410268909842,"sku":"GLFBLFF2024GANGZHU4328x100","price":24.09,"currency_code":"USD","in_stock":true},{"title":"8.02mm \/ 100","offer_id":52410268942610,"sku":"GLFBLFF2024GANGZHU4329x100","price":24.09,"currency_code":"USD","in_stock":true},{"title":"8.03mm \/ 100","offer_id":52410268975378,"sku":"GLFBLFF2024GANGZHU4330x100","price":24.29,"currency_code":"USD","in_stock":true},{"title":"8.04mm \/ 100","offer_id":52410269008146,"sku":"GLFBLFF2024GANGZHU4331x100","price":24.29,"currency_code":"USD","in_stock":true},{"title":"8.05mm \/ 100","offer_id":52410269040914,"sku":"GLFBLFF2024GANGZHU4332x100","price":24.41,"currency_code":"USD","in_stock":true},{"title":"8.1mm \/ 100","offer_id":52410269073682,"sku":"GLFBLFF2024GANGZHU4333x100","price":24.63,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 1","offer_id":52410269106450,"sku":"GLFBLFF2024GANGZHU4174x1","price":4.43,"currency_code":"USD","in_stock":true},{"title":"10.319mm \/ 1","offer_id":52410269139218,"sku":"GLFBLFF2024GANGZHU4175x1","price":4.43,"currency_code":"USD","in_stock":true},{"title":"11.113mm \/ 1","offer_id":52410269171986,"sku":"GLFBLFF2024GANGZHU4176x1","price":4.43,"currency_code":"USD","in_stock":true},{"title":"11.509mm \/ 1","offer_id":52410269204754,"sku":"GLFBLFF2024GANGZHU4177x1","price":4.43,"currency_code":"USD","in_stock":true},{"title":"11.906mm \/ 1","offer_id":52410269237522,"sku":"GLFBLFF2024GANGZHU4178x1","price":4.43,"currency_code":"USD","in_stock":true},{"title":"12mm \/ 1","offer_id":52410269270290,"sku":"GLFBLFF2024GANGZHU4179x1","price":4.43,"currency_code":"USD","in_stock":true},{"title":"12.3mm \/ 1","offer_id":52410269303058,"sku":"GLFBLFF2024GANGZHU4180x1","price":4.43,"currency_code":"USD","in_stock":true},{"title":"12.7mm \/ 1","offer_id":52410269335826,"sku":"GLFBLFF2024GANGZHU4181x1","price":4.58,"currency_code":"USD","in_stock":true},{"title":"13.5mm \/ 1","offer_id":52410269368594,"sku":"GLFBLFF2024GANGZHU4182x1","price":4.58,"currency_code":"USD","in_stock":true},{"title":"14.288mm \/ 1","offer_id":52410269401362,"sku":"GLFBLFF2024GANGZHU4183x1","price":4.58,"currency_code":"USD","in_stock":true},{"title":"15.081mm \/ 1","offer_id":52410269434130,"sku":"GLFBLFF2024GANGZHU4184x1","price":4.58,"currency_code":"USD","in_stock":true},{"title":"15.875mm \/ 1","offer_id":52410269466898,"sku":"GLFBLFF2024GANGZHU4185x1","price":4.79,"currency_code":"USD","in_stock":true},{"title":"16.669mm \/ 1","offer_id":52410269499666,"sku":"GLFBLFF2024GANGZHU4186x1","price":4.92,"currency_code":"USD","in_stock":true},{"title":"17.463mm \/ 1","offer_id":52410269532434,"sku":"GLFBLFF2024GANGZHU4187x1","price":4.92,"currency_code":"USD","in_stock":true},{"title":"18.256mm \/ 1","offer_id":52410269565202,"sku":"GLFBLFF2024GANGZHU4188x1","price":5.13,"currency_code":"USD","in_stock":true},{"title":"19.05mm \/ 1","offer_id":52410269597970,"sku":"GLFBLFF2024GANGZHU4189x1","price":5.28,"currency_code":"USD","in_stock":true},{"title":"19.844mm \/ 1","offer_id":52410269630738,"sku":"GLFBLFF2024GANGZHU4190x1","price":5.49,"currency_code":"USD","in_stock":true},{"title":"20mm \/ 1","offer_id":52410269663506,"sku":"GLFBLFF2024GANGZHU4191x1","price":5.64,"currency_code":"USD","in_stock":true},{"title":"20.638mm \/ 1","offer_id":52410269696274,"sku":"GLFBLFF2024GANGZHU4192x1","price":6.0,"currency_code":"USD","in_stock":true},{"title":"22.225mm \/ 1","offer_id":52410269729042,"sku":"GLFBLFF2024GANGZHU4193x1","price":6.91,"currency_code":"USD","in_stock":true},{"title":"25.4mm \/ 1","offer_id":52410269761810,"sku":"GLFBLFF2024GANGZHU4194x1","price":9.03,"currency_code":"USD","in_stock":true},{"title":"30mm \/ 1","offer_id":52410269794578,"sku":"GLFBLFF2024GANGZHU4195x1","price":13.07,"currency_code":"USD","in_stock":true},{"title":"5.9mm \/ 100","offer_id":52410269827346,"sku":"GLFBLFF2024GANGZHU2844x100","price":15.56,"currency_code":"USD","in_stock":true},{"title":"5.95mm \/ 100","offer_id":52410269860114,"sku":"GLFBLFF2024GANGZHU2845x100","price":15.79,"currency_code":"USD","in_stock":true},{"title":"5.98mm \/ 100","offer_id":52410269892882,"sku":"GLFBLFF2024GANGZHU2846x100","price":15.9,"currency_code":"USD","in_stock":true},{"title":"6mm \/ 100","offer_id":52410269925650,"sku":"GLFBLFF2024GANGZHU2847x100","price":15.9,"currency_code":"USD","in_stock":true},{"title":"6.01mm \/ 100","offer_id":52410269958418,"sku":"GLFBLFF2024GANGZHU2848x100","price":15.9,"currency_code":"USD","in_stock":true},{"title":"6.02mm \/ 100","offer_id":52410269991186,"sku":"GLFBLFF2024GANGZHU2849x100","price":16.13,"currency_code":"USD","in_stock":true},{"title":"6.03mm \/ 100","offer_id":52410270023954,"sku":"GLFBLFF2024GANGZHU2850x100","price":16.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of6_e1d1e43f-115f-45f9-a711-e78ee1b9613d.jpg?v=1782401130","url":"https:\/\/homediyer.com\/products\/g10-chrome-steel-precision-bearing-balls-metric","provider":"HomeDIYer","version":"1.0","type":"link"}