{"id":59861,"date":"2026-01-30T03:06:40","date_gmt":"2026-01-30T03:06:40","guid":{"rendered":"https:\/\/zgbkbearings.com\/?page_id=59861"},"modified":"2026-01-30T04:38:39","modified_gmt":"2026-01-30T04:38:39","slug":"bearing-materials-accuracy-standards","status":"publish","type":"page","link":"https:\/\/zgbkbearings.com\/ja\/bearing-materials-accuracy-standards\/","title":{"rendered":"\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\uff1a\u30d9\u30a2\u30ea\u30f3\u30b0\u6750\u6599\u3068\u7cbe\u5ea6\u57fa\u6e96\u30ac\u30a4\u30c9 | ZGBK"},"content":{"rendered":"<style>\n    .zgbk-tech-container {\n        background-color: #1a1a1a !important;\n        background-image: linear-gradient(rgba(0,0,0,0.8), rgba(0,0,0,0.8)), url('https:\/\/zgbkbearings.com\/wp-content\/uploads\/2026\/01\/1-elementor-io-optimized.webp') !important;\n        background-size: cover; background-position: center; padding: 40px 25px;\n        font-family: 'Segoe UI', Roboto, sans-serif; border: 1px solid #444; border-radius: 12px; color: #ffffff !important;\n    }\n    .zgbk-h2 {\n        color: #ffffff !important; border-left: 6px solid #DF3C2A !important; padding-left: 15px !important;\n        margin: 0 0 30px 0 !important; font-size: 28px !important; font-weight: 900 !important; text-transform: uppercase !important;\n    }\n    .zgbk-toc {\n        background: rgba(255, 255, 255, 0.08); border-left: 4px solid #DF3C2A; padding: 20px; margin-bottom: 40px;\n    }\n    .zgbk-toc-title { font-weight: 900; color: #DF3C2A; margin-bottom: 10px; text-transform: uppercase; }\n    .zgbk-toc ul { list-style: none; padding: 0; margin: 0; }\n    .zgbk-toc a { color: #ffffff; text-decoration: none; font-size: 14px; line-height: 2.2; transition: 0.3s; }\n    .zgbk-toc a:hover { color: #DF3C2A; padding-left: 8px; }\n\n    .zgbk-img-wrapper { text-align: center; margin: 20px 0 40px 0; }\n    .zgbk-tech-img { max-width: 600px; width: 100%; height: auto; border-radius: 8px; border: 1px solid #444; box-shadow: 0 5px 15px rgba(0,0,0,0.4); }\n\n    .seo-text-section { font-size: 15px; line-height: 1.8; color: #cccccc; margin-bottom: 35px; }\n    .seo-text-section strong { color: #ffffff; }\n    .tech-table-wrapper { margin-bottom: 45px; overflow-x: auto; }\n    .zgbk-data-table { width: 100%; border-collapse: collapse; background: #ffffff !important; color: #333333 !important; }\n    .zgbk-data-table th { background-color: #1a4a7c !important; color: #ffffff !important; padding: 12px; font-size: 11px; border: 1px solid #ccc; text-transform: uppercase; }\n    .zgbk-data-table td { padding: 10px; border: 1px solid #eee; text-align: center; font-weight: 600; font-size: 13px; }\n    .zgbk-data-table tr:nth-child(even) { background-color: #f8f9fa; }\n    .tech-sub-title { color: #ffffff !important; font-size: 18px; margin: 30px 0 15px 0; font-weight: 700; text-transform: uppercase; border-bottom: 1px solid #444; padding-bottom: 8px; }\n    \n    .zgbk-link-internal { color: #DF3C2A; text-decoration: underline; font-weight: bold; }\n    .zgbk-link-external { color: #5dade2; text-decoration: underline; font-weight: bold; }\n<\/style>\n\n<div class=\"zgbk-tech-container\">\n    <h2 class=\"zgbk-h2\">Optimizing Reliability: Bearing Materials &#038; Accuracy Standards<\/h2>\n\n    <div class=\"zgbk-toc\">\n        <div class=\"zgbk-toc-title\">Technical Catalogue<\/div>\n        <ul>\n            <li><a href=\"#intro\">1. Introduction to Premium Bearing Materials<\/a><\/li>\n            <li><a href=\"#t1\">2. GCr15 Chemical Composition &#038; Comparison<\/a><\/li>\n            <li><a href=\"#t3\">3. Physical Properties of Bearing Steel<\/a><\/li>\n            <li><a href=\"#t4\">4. Stainless Steel Options<\/a><\/li>\n            <li><a href=\"#t5\">5. Accuracy Standards: ISO vs ABEC<\/a><\/li>\n            <li><a href=\"#fatigue\">6. Material Fatigue Life &#038; Reliability<\/a><\/li>\n        <\/ul>\n    <\/div>\n\n    <div id=\"intro\" class=\"seo-text-section\">\n        <p><strong>Bearing Materials<\/strong> are the most critical factor determining the operational life and load-bearing capacity of any mechanical system. At ZGBK, we prioritize high-grade metallic alloys that offer exceptional fatigue life, corrosion resistance, and structural stability. Understanding the chemical composition of steel types like GCr15 allows engineers to optimize performance. For noise-sensitive applications, check our <a href=\"https:\/\/zgbkbearings.com\/ja\/bearing-vibration-standards\/\" class=\"zgbk-link-internal\">Bearing Vibration Standards<\/a> to see how industrial element purity affects vibration levels.<\/p>\n    <\/div>\n\n    <div class=\"zgbk-img-wrapper\">\n        <img decoding=\"async\" src=\"https:\/\/zgbkbearings.com\/wp-content\/uploads\/2026\/01\/Understanding-Ball-Bearings.png\" \n             alt=\"Exploded view of ball bearing materials and internal components\" \n             class=\"zgbk-tech-img\">\n    <\/div>\n\n    <h3 id=\"t1\" class=\"tech-sub-title\">Table 1. Chemical Composition of Bearing Steel (GCr15)<\/h3>\n    <div class=\"tech-table-wrapper\">\n        <table class=\"zgbk-data-table\">\n            <thead>\n                <tr><th>No.<\/th><th>C<\/th><th>Mn<\/th><th>Si<\/th><th>Cr<\/th><th>S <<\/th><th>P <<\/th><th>Ni<\/th><th>Cu<\/th><th>HB<\/th><\/tr>\n            <\/thead>\n            <tbody>\n                <tr><td>GCr15<\/td><td>0.95-1.05<\/td><td>0.20-0.40<\/td><td>0.15-0.35<\/td><td>1.30-1.65<\/td><td>0.020<\/td><td>0.027<\/td><td>0.30<\/td><td>0.25<\/td><td>170-207<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <h3 id=\"t2\" class=\"tech-sub-title\">Table 2. International Steel Grade Comparison<\/h3>\n    <div class=\"tech-table-wrapper\">\n        <table class=\"zgbk-data-table\">\n            <thead>\n                <tr><th>Country<\/th><th>China<\/th><th>ISO<\/th><th>U.S.A<\/th><th>Germany<\/th><th>Japan<\/th><th>Sweden<\/th><\/tr>\n            <\/thead>\n            <tbody>\n                <tr><td>Grade<\/td><td>GCr15<\/td><td>683\/XVIII<\/td><td>AISI 52100<\/td><td>100Cr6<\/td><td>SUJ2<\/td><td>SKF3<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <h3 id=\"t3\" class=\"tech-sub-title\">Table 3. Physical Properties of Chrome Steel<\/h3>\n    <div class=\"tech-table-wrapper\">\n        <table class=\"zgbk-data-table\">\n            <thead>\n                <tr><th>Properties<\/th><th>Density (kg\/m\u00b3)<\/th><th>Expansion (10\u207b\u2076\/K)<\/th><th>Hardness (HRC)<\/th><th>Modulus (GPa)<\/th><\/tr>\n            <\/thead>\n            <tbody>\n                <tr><td>Values<\/td><td>7.81 x 10\u00b3<\/td><td>12.5<\/td><td>60 &#8211; 64<\/td><td>208<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <div class=\"seo-text-section\">\n        <p>\u305d\u306e <strong>GCr15 chrome steel<\/strong> is the global benchmark for <strong>Bearing Materials<\/strong> in standard power transmission. Equivalent to AISI 52100, this material provides high hardness and wear resistance. Its physical properties ensure minimal deformation under heavy radial and axial loads.<\/p>\n    <\/div>\n\n    <h3 id=\"t4\" class=\"tech-sub-title\">Table 4. Chemical Composition of Stainless Steel<\/h3>\n    <div class=\"tech-table-wrapper\">\n        <table class=\"zgbk-data-table\">\n            <thead>\n                <tr><th>No.<\/th><th>C%<\/th><th>Cr%<\/th><th>Si%<\/th><th>Mn%<\/th><th>S%<\/th><th>P%<\/th><th>Mo%<\/th><th>Ni%<\/th><\/tr>\n            <\/thead>\n            <tbody>\n                <tr><td>AISI 440C<\/td><td>0.95-1.10<\/td><td>17.0-19.0<\/td><td>&le;0.8<\/td><td>&le;0.7<\/td><td>&le;0.03<\/td><td>&le;0.035<\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr>\n                <tr><td>AISI 304<\/td><td>&le;0.08<\/td><td>18.0-20.0<\/td><td>&le;1.0<\/td><td>&le;2.0<\/td><td>&le;0.03<\/td><td>&le;0.035<\/td><td>&#8211;<\/td><td>8.0-10.5<\/td><\/tr>\n                <tr><td>AISI 316<\/td><td>&le;0.08<\/td><td>16.0-18.0<\/td><td>&le;1.0<\/td><td>&le;2.0<\/td><td>&le;0.03<\/td><td>&le;0.045<\/td><td>2.0-3.0<\/td><td>10.0-14.0<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <h3 id=\"t5\" class=\"tech-sub-title\">Table 5. Tolerance &#038; Precision Grade Comparison<\/h3>\n    <div class=\"tech-table-wrapper\">\n        <table class=\"zgbk-data-table\">\n            <thead>\n                <tr><th>Standard<\/th><th>Normal<\/th><th>Class 6<\/th><th>Class 5<\/th><th>Class 4<\/th><th>Class 2<\/th><\/tr>\n            <\/thead>\n            <tbody>\n                <tr><td>ISO 492 \/ JIS<\/td><td>Normal\/0<\/td><td>Class 6<\/td><td>Class 5<\/td><td>Class 4<\/td><td>Class 2<\/td><\/tr>\n                <tr><td>DIN 620<\/td><td>P0<\/td><td>P6<\/td><td>P5<\/td><td>P4<\/td><td>P2<\/td><\/tr>\n                <tr><td>ANSI ABMA 20<\/td><td>ABEC 1<\/td><td>ABEC 3<\/td><td>ABEC 5<\/td><td>ABEC 7<\/td><td>ABEC 9<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <div class=\"seo-text-section\">\n        <p>Precision grades like ABEC 7 (ISO P4) are essential for high-performance applications. For comprehensive technical data on these tolerances, refer to the <strong><a href=\"https:\/\/www.iso.org\/standard\/80376.html\" target=\"_blank\" class=\"zgbk-link-external\" rel=\"noopener\">Official ISO 492:2023 Standard<\/a><\/strong>. Tighter tolerances reduce friction and heat generation, but they must be supported by ultra-pure <strong>Bearing Materials<\/strong> to prevent microscopic surface failures.<\/p>\n    <\/div>\n\n    <h3 id=\"fatigue\" class=\"tech-sub-title\">Material Fatigue Life &#038; Structural Integrity<\/h3>\n    <div class=\"seo-text-section\">\n        <p>The fatigue life of <strong>Bearing Materials<\/strong> is determined by the cleanliness of the steel. Non-metallic inclusions can act as stress concentration points where cracks originate. By using vacuum-degassed steel, ZGBK ensures that the molecular structure of our <strong>Bearing Materials<\/strong> is uniform, significantly extending the L10 rating life of our products. This attention to metallurgical detail is what separates premium industrial components from standard commercial grades.<\/p>\n    <\/div>\n\n    <h3 class=\"tech-sub-title\">Technical Selection for Extreme Environments<\/h3>\n    <div class=\"seo-text-section\">\n        <p>When selecting <strong>Bearing Materials<\/strong> for extreme temperatures, engineers must consider thermal expansion coefficients. At ZGBK, we offer specialized heat stabilization (S0 to S4) to ensure our materials maintain dimensional accuracy up to 250\u00b0C. Our commitment to sourcing superior <strong>Bearing Materials<\/strong> ensures every unit meets the rigorous demands of modern industry.<\/p>\n    <\/div>\n<\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Optimizing Reliability: Bearing Materials &#038; Accuracy Standards Technical Catalogue 1. Introduction to Premium Bearing Materials 2. GCr15 Chemical Composition &#038; Comparison 3. Physical Properties of Bearing Steel 4. Stainless Steel&hellip;<\/p>","protected":false},"author":2,"featured_media":59230,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-59861","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/pages\/59861","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/comments?post=59861"}],"version-history":[{"count":7,"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/pages\/59861\/revisions"}],"predecessor-version":[{"id":59876,"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/pages\/59861\/revisions\/59876"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/media\/59230"}],"wp:attachment":[{"href":"https:\/\/zgbkbearings.com\/ja\/wp-json\/wp\/v2\/media?parent=59861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}