{"product_id":"g10-grade-gcr15-bearing-steel-ball-precision-mechanical-bearings-29mm-100mm","title":"G10 Grade Gcr15 Bearing Steel Ball Precision Mechanical Bearings 29mm-100mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003ch2 class=\"hdiy-overview\"\u003eG10 Grade Gcr15 Bearing Steel Balls — Precision Rolling Elements for Demanding Mechanical Applications\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or undersized ball causes vibration, premature bearing failure, or unacceptable runout in your machinery, the root cause is almost always dimensional inconsistency. Engineers, maintenance technicians, and precision equipment builders who need a reliable replacement or upgrade turn to G10 grade Gcr15 bearing steel balls for their tight sphericity tolerances and consistent surface finish.\u003c\/p\u003e\n\u003cp\u003eThese bearing steel balls are manufactured from Gcr15 (equivalent to AISI 52100) high-carbon chromium steel, delivering a hardness of approximately 60–66 HRC after heat treatment. Available in diameters from 29 mm (approx. 1.14 in) to 100 mm (approx. 3.94 in), each ball meets G10 grade tolerances — a sphericity deviation of no more than 0.25 µm — making them suitable for precision spindles, ball screws, and load-bearing assemblies.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include replacement rolling elements in deep-groove ball bearings and angular contact bearings, load transfer balls in linear motion guides and ball screws, and precision check valves or metering applications in hydraulic and pneumatic systems where consistent diameter is critical to sealing performance.\u003c\/p\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 load rating against your application before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Gcr15 Bearing Steel Balls\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eG10 Grade Precision\u003c\/strong\u003e\n\u003cp\u003eSphericity deviation ≤ 0.25 µm and diameter tolerance within ±0.25 µm, meeting ABMA \/ ISO G10 standards for precision rolling elements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eGcr15 High-Carbon Chromium Steel\u003c\/strong\u003e\n\u003cp\u003eGcr15 (AISI 52100 equivalent) provides a through-hardened structure with hardness of approximately 60–66 HRC, resisting deformation under heavy radial and axial loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eWide Diameter Range\u003c\/strong\u003e\n\u003cp\u003eAvailable from 29 mm to 100 mm (approx. 1.14 in – 3.94 in) in 24 size steps, including fractional sizes such as 31.75 mm (1-1\/4 in), 38.1 mm (1-1\/2 in), and 63.5 mm (2-1\/2 in) for inch-standard applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCorrosion-Resistant Surface Finish\u003c\/strong\u003e\n\u003cp\u003eBright polished surface finish reduces friction and provides a degree of corrosion resistance in dry or lightly lubricated environments. Apply appropriate grease or oil for extended service life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e \u003cstrong\u003eConsistent Roundness for Low Vibration\u003c\/strong\u003e\n\u003cp\u003eTight roundness control minimizes vibration and noise in high-speed spindles, reducing heat generation and extending bearing service intervals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eVersatile Application Range\u003c\/strong\u003e\n\u003cp\u003eSuitable for deep-groove bearings, angular contact assemblies, ball screws, linear guides, check valves, and precision jigs where dimensional accuracy is non-negotiable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — Gcr15 Bearing Steel Balls\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eGcr15 high-carbon chromium bearing steel (AISI 52100 equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003ctd\u003eG10 (ABMA \/ ISO standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eApproximately 60–66 HRC (through-hardened)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSphericity Deviation\u003c\/th\u003e\n\u003ctd\u003e≤ 0.25 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e29 mm – 100 mm (approx. 1.14 in – 3.94 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Diameters\u003c\/th\u003e\n\u003ctd\u003e29, 30, 31, 31.75, 32, 33, 34, 35, 38, 38.1, 40, 45, 48, 50, 55, 60, 63.5, 65, 70, 75, 80, 85, 90, 100 mm\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\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pc per unit (see variant options for bulk pricing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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 correct diameter for my bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the inner diameter of your bearing race or housing bore with a micrometer or digital caliper. The ball diameter must match the original specification exactly — even a 0.1 mm deviation can cause excessive play or binding. Refer to your bearing manufacturer's datasheet or the stamped bearing number for the correct ball diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does G10 grade mean, and why does it matter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eG10 is a precision grade defined by ABMA Standard 10 and ISO 3290. It specifies that the sphericity deviation (difference between the largest and smallest radii) must not exceed 0.25 µm and the diameter variation across a single ball must be within 0.25 µm. This level of precision is required for applications where vibration, noise, and runout must be minimized, such as machine tool spindles and precision instruments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are Gcr15 steel balls under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGcr15 (AISI 52100) is the industry-standard material for rolling element bearings. After through-hardening, it achieves approximately 60–66 HRC, giving it excellent resistance to contact fatigue, deformation, and wear under both radial and axial loads. For specific dynamic and static load ratings, consult the bearing assembly's rated capacity rather than the ball alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls corrosion-resistant for wet or outdoor environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGcr15 bearing steel is not stainless steel. The bright polished surface provides limited corrosion resistance in dry or lightly lubricated conditions. For wet, humid, or chemically exposed environments, apply a compatible bearing grease or oil, or consider stainless steel balls (AISI 440C) instead. Contact us if you need guidance on material selection for your specific environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these balls in a ball screw or linear guide?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. G10 grade Gcr15 balls are commonly used as replacement rolling elements in recirculating ball screws and linear guide carriages. Confirm the exact ball diameter specified by the ball screw or guide manufacturer — these assemblies are sensitive to ball size, and using an incorrect diameter will affect preload and positioning accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat lubrication is recommended for these bearing steel balls?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor most bearing applications, a lithium-based or synthetic grease rated for the operating temperature and speed is appropriate. For high-speed spindles, a light mineral or synthetic oil may be preferred to reduce churning losses. Always follow the bearing assembly manufacturer's lubrication specification rather than applying lubrication to the ball alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo you offer bulk quantities or custom sizes?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe listed variants are sold individually (1 pc per unit). For bulk orders or sizes outside the 29–100 mm range listed, please contact us to confirm availability and pricing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Material and Diameter above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"Gcr15 \/ 29mm \/ 1pcs","offer_id":52410411221266,"sku":"LFL2024GANGZHU2345x1","price":13.19,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 30mm \/ 1pcs","offer_id":52410411254034,"sku":"LFL2024GANGZHU2346x1","price":14.66,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 31mm \/ 1pcs","offer_id":52410411286802,"sku":"LFL2024GANGZHU2347x1","price":16.29,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 31.75mm \/ 1pcs","offer_id":52410411319570,"sku":"LFL2024GANGZHU2348x1","price":17.11,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 32mm \/ 1pcs","offer_id":52410411352338,"sku":"LFL2024GANGZHU2349x1","price":17.38,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 33mm \/ 1pcs","offer_id":52410411385106,"sku":"LFL2024GANGZHU2350x1","price":18.74,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 34mm \/ 1pcs","offer_id":52410411417874,"sku":"LFL2024GANGZHU2351x1","price":20.1,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 35mm \/ 1pcs","offer_id":52410411450642,"sku":"LFL2024GANGZHU2352x1","price":21.46,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 38mm \/ 1pcs","offer_id":52410411483410,"sku":"LFL2024GANGZHU2353x1","price":26.52,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 38.1mm \/ 1pcs","offer_id":52410411516178,"sku":"LFL2024GANGZHU2354x1","price":26.63,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 40mm \/ 1pcs","offer_id":52410411548946,"sku":"LFL2024GANGZHU2355x1","price":30.71,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 45mm \/ 1pcs","offer_id":52410411581714,"sku":"LFL2024GANGZHU2356x1","price":40.39,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 48mm \/ 1pcs","offer_id":52410411614482,"sku":"LFL2024GANGZHU2357x1","price":48.39,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 50mm \/ 1pcs","offer_id":52410411647250,"sku":"LFL2024GANGZHU2358x1","price":55.46,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 55mm \/ 1pcs","offer_id":52410411680018,"sku":"LFL2024GANGZHU2359x1","price":71.24,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 60mm \/ 1pcs","offer_id":52410411712786,"sku":"LFL2024GANGZHU2360x1","price":91.09,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 63.5mm \/ 1pcs","offer_id":52410411745554,"sku":"LFL2024GANGZHU2361x1","price":107.68,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 65mm \/ 1pcs","offer_id":52410411778322,"sku":"LFL2024GANGZHU2362x1","price":116.93,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 70mm \/ 1pcs","offer_id":52410411811090,"sku":"LFL2024GANGZHU2363x1","price":144.68,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 75mm \/ 1pcs","offer_id":52410411843858,"sku":"LFL2024GANGZHU2364x1","price":175.41,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 80mm \/ 1pcs","offer_id":52410411876626,"sku":"LFL2024GANGZHU2365x1","price":354.12,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 85mm \/ 1pcs","offer_id":52410411909394,"sku":"LFL2024GANGZHU2366x1","price":411.78,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 90mm \/ 1pcs","offer_id":52410411942162,"sku":"LFL2024GANGZHU2367x1","price":490.55,"currency_code":"USD","in_stock":true},{"title":"Gcr15 \/ 100mm \/ 1pcs","offer_id":52410411974930,"sku":"LFL2024GANGZHU2368x1","price":645.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-02_4d6dbe45-e00c-4562-a160-cb5152d000f5.jpg?v=1782439990","url":"https:\/\/homediyer.com\/products\/g10-grade-gcr15-bearing-steel-ball-precision-mechanical-bearings-29mm-100mm","provider":"HomeDIYer","version":"1.0","type":"link"}