{"id":19044,"date":"2026-07-15T13:59:33","date_gmt":"2026-07-15T13:59:33","guid":{"rendered":"https:\/\/onmytoolings.com\/?page_id=19044"},"modified":"2026-07-16T01:57:30","modified_gmt":"2026-07-16T01:57:30","slug":"cbn-inserts-for-hard-turning","status":"publish","type":"page","link":"https:\/\/onmytoolings.com\/ja\/cbn-inserts\/cbn-inserts-for-hard-turning\/","title":{"rendered":"\u786c\u8cea\u6750\u306e\u65cb\u524a\u7528CBN\u30a4\u30f3\u30b5\u30fc\u30c8"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"19044\" class=\"elementor elementor-19044\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7ee2e76 e-con-full e-flex e-con e-parent\" data-id=\"7ee2e76\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-028c67c elementor-widget elementor-widget-html\" data-id=\"028c67c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n  .onmy-hardturn-page {\r\n    --onmy-blue: #1268c5;\r\n    --onmy-blue-dark: #064c9c;\r\n    --onmy-navy: #07111f;\r\n    --onmy-navy-2: #102946;\r\n    --onmy-text: #1b2430;\r\n    --onmy-muted: #667085;\r\n    --onmy-light: #f5f8fc;\r\n    --onmy-border: #dbe4ee;\r\n    --onmy-white: #ffffff;\r\n    --onmy-green: #0f8a5f;\r\n    --onmy-amber: #f59e0b;\r\n    --onmy-red: #dc2626;\r\n    --onmy-radius: 20px;\r\n    --onmy-shadow: 0 18px 48px rgba(7, 17, 31, 0.12);\r\n\r\n    --site-primary: #2067CB;\r\n    --site-primary-dark: #123A73;\r\n    --site-form-dark: #0B1F3A;\r\n    --site-breadcrumb: #F0F5FC;\r\n\r\n    overflow: hidden;\r\n    background: var(--onmy-white);\r\n    color: var(--onmy-text);\r\n    font-family: inherit;\r\n    line-height: 1.65;\r\n  }\r\n\r\n  .onmy-hardturn-page *,\r\n  .onmy-hardturn-page *::before,\r\n  .onmy-hardturn-page *::after {\r\n    box-sizing: border-box;\r\n  }\r\n\r\n  .onmy-hardturn-page img {\r\n    display: block;\r\n    max-width: 100%;\r\n  }\r\n\r\n  .onmy-hardturn-page a {\r\n    color: inherit;\r\n    text-decoration: none;\r\n  }\r\n\r\n  .onmy-hardturn-wrap {\r\n    width: min(1180px, calc(100% - 36px));\r\n    margin-inline: auto;\r\n  }\r\n\r\n  .onmy-hardturn-section {\r\n    padding: 82px 0;\r\n  }\r\n\r\n  .onmy-hardturn-section--light {\r\n    background: var(--onmy-light);\r\n  }\r\n\r\n  .onmy-hardturn-eyebrow {\r\n    display: inline-flex;\r\n    align-items: center;\r\n    gap: 10px;\r\n    margin-bottom: 14px;\r\n    color: var(--onmy-blue);\r\n    font-size: 13px;\r\n    font-weight: 800;\r\n    letter-spacing: .1em;\r\n    text-transform: uppercase;\r\n  }\r\n\r\n  .onmy-hardturn-eyebrow::before {\r\n    content: \"\";\r\n    width: 34px;\r\n    height: 2px;\r\n    background: currentColor;\r\n  }\r\n\r\n  .onmy-hardturn-title {\r\n    max-width: 930px;\r\n    margin: 0 0 18px;\r\n    color: var(--onmy-navy);\r\n    font-size: clamp(34px, 4.4vw, 56px);\r\n    line-height: 1.04;\r\n    letter-spacing: -.038em;\r\n  }\r\n\r\n  .onmy-hardturn-heading {\r\n    margin: 0 0 16px;\r\n    color: var(--onmy-navy);\r\n    font-size: clamp(29px, 3.2vw, 43px);\r\n    line-height: 1.12;\r\n    letter-spacing: -.026em;\r\n  }\r\n\r\n  .onmy-hardturn-lead {\r\n    max-width: 860px;\r\n    margin: 0;\r\n    color: var(--onmy-muted);\r\n    font-size: 18px;\r\n    line-height: 1.75;\r\n  }\r\n\r\n  .onmy-hardturn-section-head {\r\n    margin-bottom: 36px;\r\n  }\r\n\r\n  .onmy-hardturn-section-head--center {\r\n    max-width: 900px;\r\n    margin: 0 auto 40px;\r\n    text-align: center;\r\n  }\r\n\r\n  .onmy-hardturn-section-head--center .onmy-hardturn-eyebrow {\r\n    justify-content: center;\r\n  }\r\n\r\n  .onmy-hardturn-section-head--center .onmy-hardturn-heading,\r\n  .onmy-hardturn-section-head--center .onmy-hardturn-lead {\r\n    margin-inline: auto;\r\n  }\r\n\r\n  .onmy-hardturn-btn-row {\r\n    display: flex;\r\n    flex-wrap: wrap;\r\n    gap: 13px;\r\n    margin-top: 29px;\r\n  }\r\n\r\n  .onmy-hardturn-btn {\r\n    display: inline-flex;\r\n    align-items: center;\r\n    justify-content: center;\r\n    min-height: 48px;\r\n    padding: 0 22px;\r\n    border: 1px solid transparent;\r\n    border-radius: 999px;\r\n    font-size: 15px;\r\n    font-weight: 800;\r\n    line-height: 1.2;\r\n    transition: transform .22s ease, background .22s ease, border-color .22s ease, box-shadow .22s ease;\r\n  }\r\n\r\n  .onmy-hardturn-btn:hover {\r\n    text-decoration: none;\r\n    transform: translateY(-2px);\r\n  }\r\n\r\n  .onmy-hardturn-btn--primary {\r\n    background: var(--onmy-blue);\r\n    color: #fff !important;\r\n    box-shadow: 0 12px 25px rgba(18,104,197,.28);\r\n  }\r\n\r\n  .onmy-hardturn-btn--primary:hover {\r\n    background: var(--onmy-blue-dark);\r\n  }\r\n\r\n  .onmy-hardturn-btn--ghost {\r\n    border-color: rgba(255,255,255,.28);\r\n    background: rgba(255,255,255,.08);\r\n    color: #fff !important;\r\n  }\r\n\r\n  .onmy-hardturn-btn--ghost:hover {\r\n    background: #fff;\r\n    color: var(--onmy-navy) !important;\r\n  }\r\n\r\n  .onmy-hardturn-btn--outline {\r\n    border-color: var(--onmy-border);\r\n    background: #fff;\r\n    color: var(--onmy-blue) !important;\r\n  }\r\n\r\n  .onmy-hardturn-btn--outline:hover {\r\n    border-color: var(--onmy-blue);\r\n    box-shadow: 0 12px 28px rgba(18,104,197,.12);\r\n  }\r\n\r\n  \/* Breadcrumb *\/\r\n  .onmy-hardturn-breadcrumb {\r\n    padding: 12px 0;\r\n    background: var(--site-breadcrumb);\r\n    color: var(--onmy-muted);\r\n    font-size: 14px;\r\n  }\r\n\r\n  .onmy-hardturn-breadcrumb .onmy-hardturn-wrap {\r\n    width: 92%;\r\n    max-width: 1220px;\r\n  }\r\n\r\n  .onmy-hardturn-breadcrumb a {\r\n    color: var(--onmy-text);\r\n    text-decoration: underline;\r\n    text-underline-offset: 2px;\r\n  }\r\n\r\n  \/* Hero *\/\r\n  .onmy-hardturn-hero {\r\n    position: relative;\r\n    padding: 104px 0 88px;\r\n    overflow: hidden;\r\n    color: #fff;\r\n    background:\r\n      radial-gradient(circle at 82% 18%, rgba(18,104,197,.32), transparent 30%),\r\n      linear-gradient(135deg, #050b13 0%, #07111f 47%, #102946 100%);\r\n  }\r\n\r\n  .onmy-hardturn-hero::before {\r\n    content: \"\";\r\n    position: absolute;\r\n    inset: 0;\r\n    opacity: .42;\r\n    background:\r\n      linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px),\r\n      linear-gradient(0deg, rgba(255,255,255,.035) 1px, transparent 1px);\r\n    background-size: 52px 52px;\r\n  }\r\n\r\n  .onmy-hardturn-hero-grid {\r\n    position: relative;\r\n    display: grid;\r\n    grid-template-columns: 1.04fr .96fr;\r\n    gap: 52px;\r\n    align-items: center;\r\n  }\r\n\r\n  .onmy-hardturn-hero .onmy-hardturn-eyebrow {\r\n    color: #73b9ff;\r\n  }\r\n\r\n  .onmy-hardturn-hero .onmy-hardturn-title {\r\n    color: #fff;\r\n  }\r\n\r\n  .onmy-hardturn-hero .onmy-hardturn-lead {\r\n    color: rgba(255,255,255,.79);\r\n  }\r\n\r\n  .onmy-hardturn-hero-tags {\r\n    display: flex;\r\n    flex-wrap: wrap;\r\n    gap: 10px;\r\n    margin-top: 25px;\r\n  }\r\n\r\n  .onmy-hardturn-hero-tag {\r\n    padding: 8px 12px;\r\n    border: 1px solid rgba(255,255,255,.16);\r\n    border-radius: 999px;\r\n    background: rgba(255,255,255,.08);\r\n    color: rgba(255,255,255,.88);\r\n    font-size: 13px;\r\n    font-weight: 700;\r\n  }\r\n\r\n  .onmy-hardturn-hero-figure {\r\n    position: relative;\r\n    min-height: 448px;\r\n    margin: 0;\r\n    overflow: hidden;\r\n    border: 1px solid rgba(255,255,255,.13);\r\n    border-radius: 28px;\r\n    background: #0a1625;\r\n    box-shadow: 0 30px 75px rgba(0,0,0,.4);\r\n  }\r\n\r\n  .onmy-hardturn-hero-figure img {\r\n    width: 100%;\r\n    height: 448px;\r\n    object-fit: cover;\r\n    object-position: center;\r\n  }\r\n\r\n  .onmy-hardturn-hero-caption {\r\n    position: absolute;\r\n    right: 24px;\r\n    bottom: 24px;\r\n    left: 24px;\r\n    padding: 20px;\r\n    border: 1px solid rgba(255,255,255,.17);\r\n    border-radius: 18px;\r\n    background: rgba(7,17,31,.68);\r\n    backdrop-filter: blur(12px);\r\n  }\r\n\r\n  .onmy-hardturn-hero-caption strong {\r\n    display: block;\r\n    margin-bottom: 6px;\r\n    color: #fff;\r\n    font-size: 19px;\r\n  }\r\n\r\n  .onmy-hardturn-hero-caption span {\r\n    color: rgba(255,255,255,.75);\r\n    font-size: 14px;\r\n    line-height: 1.55;\r\n  }\r\n\r\n  \/* Finder *\/\r\n  .onmy-hardturn-finder {\r\n    position: relative;\r\n    z-index: 2;\r\n    margin-top: -34px;\r\n  }\r\n\r\n  .onmy-hardturn-finder-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(4, 1fr);\r\n    gap: 14px;\r\n    padding: 16px;\r\n    border: 1px solid var(--onmy-border);\r\n    border-radius: 22px;\r\n    background: #fff;\r\n    box-shadow: var(--onmy-shadow);\r\n  }\r\n\r\n  .onmy-hardturn-finder-item {\r\n    display: flex;\r\n    align-items: center;\r\n    gap: 13px;\r\n    min-height: 74px;\r\n    padding: 15px;\r\n    border-radius: 16px;\r\n    transition: background .2s ease, transform .2s ease;\r\n  }\r\n\r\n  .onmy-hardturn-finder-item:hover {\r\n    background: var(--onmy-light);\r\n    transform: translateY(-2px);\r\n  }\r\n\r\n  .onmy-hardturn-finder-icon {\r\n    display: grid;\r\n    flex: 0 0 43px;\r\n    width: 43px;\r\n    height: 43px;\r\n    place-items: center;\r\n    border-radius: 13px;\r\n    background: rgba(18,104,197,.1);\r\n    color: var(--onmy-blue);\r\n    font-size: 12px;\r\n    font-weight: 900;\r\n  }\r\n\r\n  .onmy-hardturn-finder-item strong {\r\n    display: block;\r\n    margin-bottom: 2px;\r\n    color: var(--onmy-navy);\r\n    font-size: 15px;\r\n  }\r\n\r\n  .onmy-hardturn-finder-item span span {\r\n    color: var(--onmy-muted);\r\n    font-size: 12px;\r\n  }\r\n\r\n  \/* Material cards *\/\r\n  .onmy-hardturn-grid {\r\n    display: grid;\r\n    gap: 20px;\r\n  }\r\n\r\n  .onmy-hardturn-grid--4 {\r\n    grid-template-columns: repeat(4, 1fr);\r\n  }\r\n\r\n  .onmy-hardturn-card {\r\n    position: relative;\r\n    height: 100%;\r\n    overflow: hidden;\r\n    border: 1px solid var(--onmy-border);\r\n    border-radius: var(--onmy-radius);\r\n    background: #fff;\r\n    transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;\r\n  }\r\n\r\n  .onmy-hardturn-card:hover {\r\n    border-color: rgba(18,104,197,.3);\r\n    box-shadow: var(--onmy-shadow);\r\n    transform: translateY(-5px);\r\n  }\r\n\r\n  .onmy-hardturn-card figure {\r\n    height: 205px;\r\n    margin: 0;\r\n    overflow: hidden;\r\n    background: #eef3f8;\r\n  }\r\n\r\n  .onmy-hardturn-card img {\r\n    width: 100%;\r\n    height: 100%;\r\n    object-fit: cover;\r\n  }\r\n\r\n  .onmy-hardturn-card-body {\r\n    padding: 24px;\r\n  }\r\n\r\n  .onmy-hardturn-card-tag {\r\n    display: inline-flex;\r\n    margin-bottom: 10px;\r\n    padding: 6px 10px;\r\n    border-radius: 999px;\r\n    background: rgba(18,104,197,.1);\r\n    color: var(--onmy-blue);\r\n    font-size: 12px;\r\n    font-weight: 850;\r\n  }\r\n\r\n  .onmy-hardturn-card h3 {\r\n    margin: 0 0 9px;\r\n    color: var(--onmy-navy);\r\n    font-size: 20px;\r\n    line-height: 1.3;\r\n  }\r\n\r\n  .onmy-hardturn-card p {\r\n    margin: 0;\r\n    color: var(--onmy-muted);\r\n    font-size: 15px;\r\n    line-height: 1.7;\r\n  }\r\n\r\n  \/* Hard turning conditions *\/\r\n  .onmy-hardturn-condition-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(3, 1fr);\r\n    gap: 18px;\r\n  }\r\n\r\n  .onmy-hardturn-condition-card {\r\n    padding: 24px;\r\n    border: 1px solid var(--onmy-border);\r\n    border-radius: 18px;\r\n    background: #fff;\r\n  }\r\n\r\n  .onmy-hardturn-condition-card strong {\r\n    display: block;\r\n    margin-bottom: 8px;\r\n    color: var(--onmy-navy);\r\n    font-size: 18px;\r\n  }\r\n\r\n  .onmy-hardturn-condition-card p {\r\n    margin: 0;\r\n    color: var(--onmy-muted);\r\n    font-size: 14px;\r\n  }\r\n\r\n  .onmy-hardturn-condition-bar {\r\n    height: 8px;\r\n    margin-top: 18px;\r\n    overflow: hidden;\r\n    border-radius: 999px;\r\n    background: #eaf0f6;\r\n  }\r\n\r\n  .onmy-hardturn-condition-fill {\r\n    height: 100%;\r\n    border-radius: inherit;\r\n    background: linear-gradient(90deg, var(--onmy-blue), #56a9ff);\r\n  }\r\n\r\n  \/* Tables *\/\r\n  .onmy-hardturn-table-wrap {\r\n    overflow-x: auto;\r\n    border: 1px solid var(--onmy-border);\r\n    border-radius: 18px;\r\n    background: #fff;\r\n    box-shadow: 0 10px 30px rgba(7,17,31,.06);\r\n  }\r\n\r\n  .onmy-hardturn-table {\r\n    width: 100%;\r\n    min-width: 820px;\r\n    border-collapse: collapse;\r\n  }\r\n\r\n  .onmy-hardturn-table th,\r\n  .onmy-hardturn-table td {\r\n    padding: 15px 16px;\r\n    border-bottom: 1px solid var(--onmy-border);\r\n    text-align: left;\r\n    vertical-align: top;\r\n  }\r\n\r\n  .onmy-hardturn-table th {\r\n    background: var(--onmy-navy);\r\n    color: #fff;\r\n    font-size: 13px;\r\n  }\r\n\r\n  .onmy-hardturn-table td {\r\n    color: var(--onmy-text);\r\n    font-size: 14px;\r\n  }\r\n\r\n  .onmy-hardturn-table tr:last-child td {\r\n    border-bottom: 0;\r\n  }\r\n\r\n  .onmy-hardturn-pill {\r\n    display: inline-flex;\r\n    padding: 6px 10px;\r\n    border-radius: 999px;\r\n    background: rgba(18,104,197,.1);\r\n    color: var(--onmy-blue);\r\n    font-size: 12px;\r\n    font-weight: 900;\r\n  }\r\n\r\n  .onmy-hardturn-note {\r\n    margin-top: 14px;\r\n    color: var(--onmy-muted);\r\n    font-size: 13px;\r\n    line-height: 1.65;\r\n  }\r\n\r\n  \/* Split figure *\/\r\n  .onmy-hardturn-split {\r\n    display: grid;\r\n    grid-template-columns: .92fr 1.08fr;\r\n    gap: 42px;\r\n    align-items: center;\r\n  }\r\n\r\n  .onmy-hardturn-figure {\r\n    margin: 0;\r\n    overflow: hidden;\r\n    border-radius: 24px;\r\n    background: var(--onmy-navy);\r\n    box-shadow: var(--onmy-shadow);\r\n  }\r\n\r\n  .onmy-hardturn-figure img {\r\n    width: 100%;\r\n    min-height: 370px;\r\n    max-height: 500px;\r\n    object-fit: cover;\r\n  }\r\n\r\n  .onmy-hardturn-figure figcaption {\r\n    padding: 16px 20px;\r\n    background: linear-gradient(135deg, var(--onmy-navy), var(--onmy-navy-2));\r\n    color: rgba(255,255,255,.78);\r\n    font-size: 14px;\r\n  }\r\n\r\n  \/* Failure mode cards *\/\r\n  .onmy-hardturn-failure-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(4, 1fr);\r\n    gap: 16px;\r\n  }\r\n\r\n  .onmy-hardturn-failure-card {\r\n    padding: 22px;\r\n    border: 1px solid var(--onmy-border);\r\n    border-radius: 18px;\r\n    background: #fff;\r\n  }\r\n\r\n  .onmy-hardturn-failure-icon {\r\n    display: grid;\r\n    width: 44px;\r\n    height: 44px;\r\n    margin-bottom: 14px;\r\n    place-items: center;\r\n    border-radius: 13px;\r\n    background: rgba(18,104,197,.1);\r\n    color: var(--onmy-blue);\r\n    font-weight: 900;\r\n  }\r\n\r\n  .onmy-hardturn-failure-card h3 {\r\n    margin: 0 0 8px;\r\n    color: var(--onmy-navy);\r\n    font-size: 18px;\r\n  }\r\n\r\n  .onmy-hardturn-failure-card p {\r\n    margin: 0;\r\n    color: var(--onmy-muted);\r\n    font-size: 14px;\r\n  }\r\n\r\n  \/* Case readiness panel *\/\r\n  .onmy-hardturn-case-panel {\r\n    display: grid;\r\n    grid-template-columns: .95fr 1.05fr;\r\n    overflow: hidden;\r\n    border-radius: 26px;\r\n    background: var(--onmy-navy);\r\n    box-shadow: var(--onmy-shadow);\r\n  }\r\n\r\n  .onmy-hardturn-case-copy {\r\n    padding: 42px;\r\n    color: #fff;\r\n  }\r\n\r\n  .onmy-hardturn-case-copy .onmy-hardturn-eyebrow {\r\n    color: #73b9ff;\r\n  }\r\n\r\n  .onmy-hardturn-case-copy h2 {\r\n    margin: 0 0 15px;\r\n    color: #fff;\r\n    font-size: clamp(29px, 3vw, 42px);\r\n    line-height: 1.12;\r\n  }\r\n\r\n  .onmy-hardturn-case-copy p {\r\n    margin: 0;\r\n    color: rgba(255,255,255,.74);\r\n  }\r\n\r\n  .onmy-hardturn-case-list {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, 1fr);\r\n    gap: 11px;\r\n    padding: 30px;\r\n    background: linear-gradient(145deg, #0d2039, #12345a);\r\n  }\r\n\r\n  .onmy-hardturn-case-item {\r\n    padding: 17px;\r\n    border: 1px solid rgba(255,255,255,.12);\r\n    border-radius: 15px;\r\n    background: rgba(255,255,255,.06);\r\n  }\r\n\r\n  .onmy-hardturn-case-item strong {\r\n    display: block;\r\n    margin-bottom: 4px;\r\n    color: #fff;\r\n    font-size: 14px;\r\n  }\r\n\r\n  .onmy-hardturn-case-item span {\r\n    color: rgba(255,255,255,.68);\r\n    font-size: 12px;\r\n  }\r\n\r\n\r\n  \/* Cutting data and surface-finish formula *\/\r\n  .onmy-hardturn-formula {\r\n    display: grid;\r\n    grid-template-columns: .78fr 1.22fr;\r\n    gap: 22px;\r\n    align-items: stretch;\r\n  }\r\n\r\n  .onmy-hardturn-formula-box {\r\n    display: flex;\r\n    flex-direction: column;\r\n    justify-content: center;\r\n    padding: 30px;\r\n    border-radius: 22px;\r\n    background: linear-gradient(150deg, var(--onmy-navy), var(--onmy-navy-2));\r\n    color: #fff;\r\n    box-shadow: var(--onmy-shadow);\r\n  }\r\n\r\n  .onmy-hardturn-formula-box strong {\r\n    display: block;\r\n    margin-bottom: 10px;\r\n    font-size: 30px;\r\n    line-height: 1.2;\r\n  }\r\n\r\n  .onmy-hardturn-formula-box p {\r\n    margin: 0;\r\n    color: rgba(255,255,255,.74);\r\n  }\r\n\r\n  .onmy-hardturn-formula-terms {\r\n    display: grid;\r\n    gap: 10px;\r\n    margin-top: 20px;\r\n  }\r\n\r\n  .onmy-hardturn-formula-term {\r\n    padding: 12px 14px;\r\n    border: 1px solid rgba(255,255,255,.13);\r\n    border-radius: 12px;\r\n    background: rgba(255,255,255,.06);\r\n    color: rgba(255,255,255,.86);\r\n    font-size: 13px;\r\n  }\r\n\r\n  \/* FAQ *\/\r\n  .onmy-hardturn-faq {\r\n    display: grid;\r\n    gap: 12px;\r\n    max-width: 980px;\r\n    margin: 0 auto;\r\n  }\r\n\r\n  .onmy-hardturn-faq details {\r\n    padding: 18px 20px;\r\n  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.onmy-existing-form select,\r\n  .onmy-hardturn-page .onmy-existing-form textarea,\r\n  .onmy-hardturn-page .wpforms-container input,\r\n  .onmy-hardturn-page .wpforms-container select,\r\n  .onmy-hardturn-page .wpforms-container textarea {\r\n    width: 100% !important;\r\n    padding: 13px !important;\r\n    border: 1px solid #D8E6F8 !important;\r\n    border-radius: 6px !important;\r\n    background: #fff !important;\r\n    color: #334155 !important;\r\n    box-shadow: none !important;\r\n    font-family: inherit !important;\r\n    font-size: 15px !important;\r\n  }\r\n\r\n  .onmy-hardturn-page .onmy-existing-form textarea,\r\n  .onmy-hardturn-page .wpforms-container textarea {\r\n    min-height: 130px !important;\r\n    resize: vertical;\r\n  }\r\n\r\n  .onmy-hardturn-page .onmy-existing-form input[type=\"submit\"],\r\n  .onmy-hardturn-page .onmy-existing-form button[type=\"submit\"],\r\n  .onmy-hardturn-page .wpforms-container button[type=\"submit\"],\r\n  .onmy-hardturn-page .wpforms-container .wpforms-submit {\r\n    width: 100% !important;\r\n    padding: 13px 24px !important;\r\n    border: 1px solid var(--site-primary) !important;\r\n    border-radius: 6px !important;\r\n    background: var(--site-primary) !important;\r\n    color: #fff !important;\r\n    cursor: pointer !important;\r\n    font-weight: 700 !important;\r\n  }\r\n\r\n  .onmy-hardturn-page .onmy-existing-form input[type=\"submit\"]:hover,\r\n  .onmy-hardturn-page .onmy-existing-form button[type=\"submit\"]:hover,\r\n  .onmy-hardturn-page .wpforms-container button[type=\"submit\"]:hover,\r\n  .onmy-hardturn-page .wpforms-container .wpforms-submit:hover {\r\n    border-color: var(--site-primary-dark) !important;\r\n    background: var(--site-primary-dark) !important;\r\n  }\r\n\r\n  @media (max-width: 1040px) {\r\n    .onmy-hardturn-hero-grid,\r\n    .onmy-hardturn-split,\r\n    .onmy-hardturn-formula,\r\n    .onmy-hardturn-case-panel,\r\n    .onmy-hardturn-quote-grid {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .onmy-hardturn-finder-grid,\r\n    .onmy-hardturn-grid--4,\r\n    .onmy-hardturn-failure-grid {\r\n      grid-template-columns: repeat(2, 1fr);\r\n    }\r\n\r\n    .onmy-hardturn-condition-grid {\r\n      grid-template-columns: 1fr;\r\n    }\r\n  }\r\n\r\n  @media (max-width: 760px) {\r\n    .onmy-hardturn-section {\r\n      padding: 58px 0;\r\n    }\r\n\r\n    .onmy-hardturn-finder-grid,\r\n    .onmy-hardturn-grid--4,\r\n    .onmy-hardturn-failure-grid,\r\n    .onmy-hardturn-case-list {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .onmy-hardturn-finder {\r\n      margin-top: 0;\r\n      padding-top: 18px;\r\n    }\r\n\r\n    .onmy-hardturn-hero-figure,\r\n    .onmy-hardturn-hero-figure img {\r\n      min-height: 340px;\r\n      height: 340px;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<div class=\"onmy-hardturn-page\">\r\n\r\n  <div class=\"onmy-hardturn-breadcrumb\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <a href=\"\/\" target=\"_blank\">Home<\/a> \/\r\n      <a href=\"\/cbn-inserts\/\" target=\"_blank\">CBN Inserts<\/a> \/\r\n      CBN Inserts for Hard Turning\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <header class=\"onmy-hardturn-hero\">\r\n    <div class=\"onmy-hardturn-wrap onmy-hardturn-hero-grid\">\r\n      <div>\r\n        <div class=\"onmy-hardturn-eyebrow\">Hard Turning with PCBN<\/div>\r\n        <h1 class=\"onmy-hardturn-title\">CBN Inserts for Hard Turning Hardened Steel<\/h1>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          Select CBN and PCBN inserts for hardened steel, bearing steel, case-hardened parts,\r\n          continuous finishing and interrupted hard turning. Match the grade, insert geometry,\r\n          edge preparation and cutting condition to the required tool life and surface finish.\r\n        <\/p>\r\n\r\n        <div class=\"onmy-hardturn-hero-tags\">\r\n          <span class=\"onmy-hardturn-hero-tag\">Hardened Steel<\/span>\r\n          <span class=\"onmy-hardturn-hero-tag\">Bearing Steel<\/span>\r\n          <span class=\"onmy-hardturn-hero-tag\">Case-Hardened Parts<\/span>\r\n          <span class=\"onmy-hardturn-hero-tag\">Finish Hard Turning<\/span>\r\n        <\/div>\r\n\r\n        <div class=\"onmy-hardturn-btn-row\">\r\n          <a class=\"onmy-hardturn-btn onmy-hardturn-btn--primary\" href=\"#quote\">Get a Grade Recommendation<\/a>\r\n          <a class=\"onmy-hardturn-btn onmy-hardturn-btn--ghost\" href=\"#conditions\">Choose by Cutting Condition<\/a>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <figure class=\"onmy-hardturn-hero-figure\">\r\n        <img fetchpriority=\"high\" decoding=\"async\"\r\n          src=\"\/wp-content\/uploads\/2026\/07\/cbn-inserts-for-hard-turning-hardened-steel.webp\"\r\n          width=\"900\"\r\n          height=\"760\"\r\n          fetchpriority=\"high\"\r\n          alt=\"CBN inserts for hard turning hardened steel\">\r\n        <figcaption class=\"onmy-hardturn-hero-caption\">\r\n          <strong>PCBN insert selection for hard turning<\/strong>\r\n          <span>Choose the grade and geometry according to hardness, continuity of cut, finish requirement and current failure mode.<\/span>\r\n        <\/figcaption>\r\n      <\/figure>\r\n    <\/div>\r\n  <\/header>\r\n\r\n  <div class=\"onmy-hardturn-finder\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <nav class=\"onmy-hardturn-finder-grid\" aria-label=\"Hard turning quick finder\">\r\n        <a class=\"onmy-hardturn-finder-item\" href=\"#materials\">\r\n          <span class=\"onmy-hardturn-finder-icon\">MAT<\/span>\r\n          <span><strong>Choose by Material<\/strong><span>Bearing, tool or case-hardened steel<\/span><\/span>\r\n        <\/a>\r\n        <a class=\"onmy-hardturn-finder-item\" href=\"#conditions\">\r\n          <span class=\"onmy-hardturn-finder-icon\">CUT<\/span>\r\n          <span><strong>Choose by Cut<\/strong><span>Continuous, light or heavy interruption<\/span><\/span>\r\n        <\/a>\r\n        <a class=\"onmy-hardturn-finder-item\" href=\"#grades\">\r\n          <span class=\"onmy-hardturn-finder-icon\">GR<\/span>\r\n          <span><strong>Select a PCBN Grade<\/strong><span>Balance wear resistance and toughness<\/span><\/span>\r\n        <\/a>\r\n        <a class=\"onmy-hardturn-finder-item\" href=\"#cutting-data\">\r\n          <span class=\"onmy-hardturn-finder-icon\">DATA<\/span>\r\n          <span><strong>View Starting Parameters<\/strong><span>Speed, feed and depth of cut<\/span><\/span>\r\n        <\/a>\r\n      <\/nav>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <section class=\"onmy-hardturn-section\" id=\"materials\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-section-head\">\r\n        <div class=\"onmy-hardturn-eyebrow\">Workpiece Materials<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">Hard Turning Applications by Steel Type<\/h2>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          The material condition, hardened layer and interruption level influence grade and geometry selection.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-grid onmy-hardturn-grid--4\">\r\n        <article class=\"onmy-hardturn-card\">\r\n          <figure><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/pcbn-inserts-for-bearing-steel.webp\" alt=\"PCBN inserts for bearing steel hard turning\" loading=\"lazy\"><\/figure>\r\n          <div class=\"onmy-hardturn-card-body\">\r\n            <span class=\"onmy-hardturn-card-tag\">Bearing Steel<\/span>\r\n            <h3>Hardened Bearing Components<\/h3>\r\n            <p>Finish races, shafts and hardened functional surfaces with stable geometry and wear-focused grades.<\/p>\r\n          <\/div>\r\n        <\/article>\r\n\r\n        <article class=\"onmy-hardturn-card\">\r\n          <figure><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/pcbn-inserts-for-case-hardened-steel.webp\" alt=\"PCBN inserts for case hardened steel turning\" loading=\"lazy\"><\/figure>\r\n          <div class=\"onmy-hardturn-card-body\">\r\n            <span class=\"onmy-hardturn-card-tag\">Case-Hardened Steel<\/span>\r\n            <h3>Case-Hardened Parts<\/h3>\r\n            <p>Match the cutting edge to the hardened case, component geometry and possible transitions into softer core material.<\/p>\r\n          <\/div>\r\n        <\/article>\r\n\r\n        <article class=\"onmy-hardturn-card\">\r\n          <figure><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/pcbn-inserts-for-tool-steel.webp\" alt=\"PCBN inserts for hardened tool steel\" loading=\"lazy\"><\/figure>\r\n          <div class=\"onmy-hardturn-card-body\">\r\n            <span class=\"onmy-hardturn-card-tag\">Tool Steel<\/span>\r\n            <h3>Hardened Tool and Die Steel<\/h3>\r\n            <p>Use application-matched PCBN grades for stable finishing or interrupted surfaces in hardened tool steels.<\/p>\r\n          <\/div>\r\n        <\/article>\r\n\r\n        <article class=\"onmy-hardturn-card\">\r\n          <figure><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/pcbn-inserts-for-through-hardened-steel.webp\" alt=\"PCBN inserts for through hardened steel turning\" loading=\"lazy\"><\/figure>\r\n          <div class=\"onmy-hardturn-card-body\">\r\n            <span class=\"onmy-hardturn-card-tag\">Through-Hardened Steel<\/span>\r\n            <h3>Through-Hardened Components<\/h3>\r\n            <p>Review hardness, stock allowance, setup rigidity and continuity of cut before selecting the grade and insert body.<\/p>\r\n          <\/div>\r\n        <\/article>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"onmy-hardturn-section onmy-hardturn-section--light\" id=\"conditions\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-section-head--center\">\r\n        <div class=\"onmy-hardturn-eyebrow\">Cutting Continuity<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">Choose CBN Inserts by Hard-Turning Condition<\/h2>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          As interruption increases, selection moves from wear-focused grades toward tougher grades and more stable edge conditions.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-condition-grid\">\r\n        <div class=\"onmy-hardturn-condition-card\">\r\n          <strong>Continuous Hard Turning<\/strong>\r\n          <p>Prioritize wear resistance, dimensional consistency and surface finish in stable cuts.<\/p>\r\n          <div class=\"onmy-hardturn-condition-bar\"><div class=\"onmy-hardturn-condition-fill\" style=\"width:34%\"><\/div><\/div>\r\n        <\/div>\r\n        <div class=\"onmy-hardturn-condition-card\">\r\n          <strong>Light-Interrupted Hard Turning<\/strong>\r\n          <p>Balance abrasion resistance and toughness for small holes, shallow keyways or periodic interruption.<\/p>\r\n          <div class=\"onmy-hardturn-condition-bar\"><div class=\"onmy-hardturn-condition-fill\" style=\"width:66%\"><\/div><\/div>\r\n        <\/div>\r\n        <div class=\"onmy-hardturn-condition-card\">\r\n          <strong>Moderate \/ Heavy Interruption<\/strong>\r\n          <p>Use tougher grade direction, stable insert geometry and appropriate edge preparation where impact dominates.<\/p>\r\n          <div class=\"onmy-hardturn-condition-bar\"><div class=\"onmy-hardturn-condition-fill\" style=\"width:100%\"><\/div><\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"onmy-hardturn-section\" id=\"grades\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-section-head\">\r\n        <div class=\"onmy-hardturn-eyebrow\">PCBN Grade Direction<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">PCBN Grades for Hard Turning<\/h2>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          Use the grade table as a starting point, then confirm availability for the selected insert code and structure.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-table-wrap\">\r\n        <table class=\"onmy-hardturn-table\">\r\n          <thead>\r\n            <tr>\r\n              <th>Grade<\/th>\r\n              <th>CBN Content<\/th>\r\n              <th>Best-Fit Condition<\/th>\r\n              <th>Hard-Turning Direction<\/th>\r\n            <\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr>\r\n              <td><span class=\"onmy-hardturn-pill\">OBN45<\/span><\/td>\r\n              <td>Approx. 45%<\/td>\r\n              <td>Continuous to moderately interrupted<\/td>\r\n              <td>Finish hard turning, high speed and fine surface finish<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><span class=\"onmy-hardturn-pill\">OBC50<\/span><\/td>\r\n              <td>Approx. 50%<\/td>\r\n              <td>Continuous to lightly interrupted<\/td>\r\n              <td>General hard machining and cold-work tool steel<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><span class=\"onmy-hardturn-pill\">O2C50<\/span><\/td>\r\n              <td>Approx. 50%<\/td>\r\n              <td>Continuous to lightly interrupted<\/td>\r\n              <td>Higher-speed hard machining with abrasion resistance<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><span class=\"onmy-hardturn-pill\">OBX60 \/ OBX65<\/span><\/td>\r\n              <td>Approx. 65%<\/td>\r\n              <td>Moderate to heavy interruption<\/td>\r\n              <td>Hardened steel requiring greater toughness<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><span class=\"onmy-hardturn-pill\">OBW85<\/span><\/td>\r\n              <td>Approx. 85%<\/td>\r\n              <td>Heavy interruption and abrasive conditions<\/td>\r\n              <td>Use where chip resistance and toughness become more important<\/td>\r\n            <\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n      <p class=\"onmy-hardturn-note\">Confirm the final commercial naming of OBX60\/OBX65 before publishing.<\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n\r\n  <section class=\"onmy-hardturn-section onmy-hardturn-section--light\" id=\"cutting-data\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-section-head\">\r\n        <div class=\"onmy-hardturn-eyebrow\">Recommended Starting Data<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">CBN Cutting Parameters for Hardened Steel<\/h2>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          Use these values as starting ranges. Final speed, feed and depth of cut must be adjusted to the selected PCBN grade, insert geometry, hardness, interruption level and machine rigidity.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-table-wrap\">\r\n        <table class=\"onmy-hardturn-table\">\r\n          <thead>\r\n            <tr>\r\n              <th>Operation<\/th>\r\n              <th>Cutting Condition<\/th>\r\n              <th>Cutting Speed Vc<\/th>\r\n              <th>Depth of Cut ap<\/th>\r\n              <th>Feed f<\/th>\r\n            <\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr>\r\n              <td><strong>Turning \/ Roughing<\/strong><\/td>\r\n              <td>Continuous cutting<\/td>\r\n              <td>80\u2013160 m\/min<\/td>\r\n              <td>1.0\u20132.5 mm<\/td>\r\n              <td>0.1\u20130.5 mm\/rev<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><strong>Turning \/ Roughing<\/strong><\/td>\r\n              <td>Interrupted cutting<\/td>\r\n              <td>80\u2013125 m\/min<\/td>\r\n              <td>1.0\u20132.5 mm<\/td>\r\n              <td>0.1\u20130.5 mm\/rev<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><strong>Final Turning<\/strong><\/td>\r\n              <td>Continuous cutting<\/td>\r\n              <td>125\u2013210 m\/min<\/td>\r\n              <td>0.1\u20130.5 mm<\/td>\r\n              <td>0.05\u20130.2 mm\/rev<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><strong>Final Turning<\/strong><\/td>\r\n              <td>Interrupted cutting<\/td>\r\n              <td>100\u2013150 m\/min<\/td>\r\n              <td>0.1\u20130.5 mm<\/td>\r\n              <td>0.05\u20130.2 mm\/rev<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><strong>High-Alloyed Steel Roughing<\/strong><\/td>\r\n              <td>General turning<\/td>\r\n              <td>60\u2013110 m\/min<\/td>\r\n              <td>0.5\u20132.0 mm<\/td>\r\n              <td>0.15\u20130.3 mm\/rev<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td><strong>High-Alloyed Steel Finishing<\/strong><\/td>\r\n              <td>Final turning<\/td>\r\n              <td>80\u2013150 m\/min<\/td>\r\n              <td>0.1\u20130.5 mm<\/td>\r\n              <td>0.05\u20130.2 mm\/rev<\/td>\r\n            <\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n\r\n      <p class=\"onmy-hardturn-note\">\r\n        Start from the lower half of the range for a new setup, unstable clamping or interrupted surfaces. Increase one parameter at a time after confirming edge condition and surface finish.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"onmy-hardturn-section onmy-hardturn-section--light\" id=\"geometry\">\r\n    <div class=\"onmy-hardturn-wrap onmy-hardturn-split\">\r\n      <figure class=\"onmy-hardturn-figure\">\r\n        <img loading=\"lazy\" decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/hard-turning-insert-geometry-guide.webp\"\r\n             width=\"960\" height=\"720\" loading=\"lazy\"\r\n             alt=\"Hard turning insert geometry and nose radius guide\">\r\n        <figcaption>Use a final diagram showing stable turning shapes, profiling shapes and representative nose radii.<\/figcaption>\r\n      <\/figure>\r\n\r\n      <div>\r\n        <div class=\"onmy-hardturn-eyebrow\">Insert Geometry<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">Choose the Insert Shape for the Hard-Turning Cut<\/h2>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          Geometry selection depends on component access, insert strength, holder style and required profile.\r\n        <\/p>\r\n\r\n        <div style=\"height:24px\"><\/div>\r\n\r\n        <div class=\"onmy-hardturn-table-wrap\">\r\n          <table class=\"onmy-hardturn-table\">\r\n            <thead>\r\n              <tr>\r\n                <th>Geometry Direction<\/th>\r\n                <th>Representative Families<\/th>\r\n                <th>Typical Use<\/th>\r\n              <\/tr>\r\n            <\/thead>\r\n            <tbody>\r\n              <tr><td>Stable general turning<\/td><td>CNGA, SNGA, WNGA<\/td><td>External diameters, facing and stable hard finishing<\/td><\/tr>\r\n              <tr><td>Profiling and shoulder access<\/td><td>DNGA, VNGA<\/td><td>Contours, tapers and restricted approach<\/td><\/tr>\r\n              <tr><td>Multi-corner turning<\/td><td>TNGA, WNGA<\/td><td>General turning where usable corner count is important<\/td><\/tr>\r\n              <tr><td>Lower-force \/ internal turning<\/td><td>CCGW, DCGW, TCGW, VCGW<\/td><td>Boring, profiling and lighter cutting-force requirements<\/td><\/tr>\r\n            <\/tbody>\r\n          <\/table>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"onmy-hardturn-section\" id=\"troubleshooting\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-section-head--center\">\r\n        <div class=\"onmy-hardturn-eyebrow\">Troubleshooting<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">Common Hard-Turning Tool-Life Problems<\/h2>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          Review the failure mode before changing grade, geometry or cutting data.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-failure-grid\">\r\n        <div class=\"onmy-hardturn-failure-card\">\r\n          <span class=\"onmy-hardturn-failure-icon\">W<\/span>\r\n          <h3>Rapid Flank Wear<\/h3>\r\n          <p>Review cutting speed, stock consistency, grade wear resistance and edge engagement.<\/p>\r\n        <\/div>\r\n        <div class=\"onmy-hardturn-failure-card\">\r\n          <span class=\"onmy-hardturn-failure-icon\">C<\/span>\r\n          <h3>Edge Chipping<\/h3>\r\n          <p>Check interruption level, setup rigidity, edge preparation and grade toughness.<\/p>\r\n        <\/div>\r\n        <div class=\"onmy-hardturn-failure-card\">\r\n          <span class=\"onmy-hardturn-failure-icon\">F<\/span>\r\n          <h3>Poor Surface Finish<\/h3>\r\n          <p>Review nose radius, feed, vibration, workpiece support and accumulated edge wear.<\/p>\r\n        <\/div>\r\n        <div class=\"onmy-hardturn-failure-card\">\r\n          <span class=\"onmy-hardturn-failure-icon\">V<\/span>\r\n          <h3>Dimensional Variation<\/h3>\r\n          <p>Check machine stability, thermal effects, insert seating and progressive wear.<\/p>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n\r\n  <section class=\"onmy-hardturn-section onmy-hardturn-section--light\" id=\"surface-finish\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-section-head\">\r\n        <div class=\"onmy-hardturn-eyebrow\">Nose Radius and Feed<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">How Nose Radius and Feed Affect Hard-Turning Finish<\/h2>\r\n        <p class=\"onmy-hardturn-lead\">\r\n          The theoretical surface profile is influenced by feed per revolution and cutting-edge radius. Actual finish can still be limited by vibration, clamping, tool wear and workpiece instability.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-formula\">\r\n        <div class=\"onmy-hardturn-formula-box\">\r\n          <strong>Rt = f\u00b2 \/ (8 \u00d7 r)<\/strong>\r\n          <p>The formula estimates theoretical surface roughness from feed and nose radius.<\/p>\r\n          <div class=\"onmy-hardturn-formula-terms\">\r\n            <div class=\"onmy-hardturn-formula-term\"><strong style=\"display:inline;font-size:13px\">Rt<\/strong> \u2014 theoretical surface roughness<\/div>\r\n            <div class=\"onmy-hardturn-formula-term\"><strong style=\"display:inline;font-size:13px\">f<\/strong> \u2014 feed per revolution, mm\/rev<\/div>\r\n            <div class=\"onmy-hardturn-formula-term\"><strong style=\"display:inline;font-size:13px\">r<\/strong> \u2014 cutting-edge radius, mm<\/div>\r\n          <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"onmy-hardturn-table-wrap\">\r\n          <table class=\"onmy-hardturn-table\">\r\n            <thead>\r\n              <tr>\r\n                <th>Target Ra<\/th>\r\n                <th>Rt<\/th>\r\n                <th>r = 0.2<\/th>\r\n                <th>r = 0.4<\/th>\r\n                <th>r = 0.8<\/th>\r\n                <th>r = 1.2<\/th>\r\n                <th>r = 1.6<\/th>\r\n              <\/tr>\r\n            <\/thead>\r\n            <tbody>\r\n              <tr><td>0.8<\/td><td>1.8<\/td><td>0.05<\/td><td>0.07<\/td><td>0.10<\/td><td>0.12<\/td><td>0.14<\/td><\/tr>\r\n              <tr><td>1.6<\/td><td>4.0<\/td><td>0.08<\/td><td>0.11<\/td><td>0.15<\/td><td>0.19<\/td><td>0.23<\/td><\/tr>\r\n              <tr><td>3.2<\/td><td>10.0<\/td><td>0.12<\/td><td>0.17<\/td><td>0.24<\/td><td>0.29<\/td><td>0.36<\/td><\/tr>\r\n              <tr><td>6.3<\/td><td>16.0<\/td><td>0.16<\/td><td>0.22<\/td><td>0.30<\/td><td>0.37<\/td><td>0.45<\/td><\/tr>\r\n            <\/tbody>\r\n          <\/table>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <p class=\"onmy-hardturn-note\">\r\n        Table values are feed f in mm\/rev. The theoretical calculation does not include unstable machining conditions, insufficient machine or workpiece rigidity, incorrect clamping, tool wear or variable depth of cut.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"onmy-hardturn-section onmy-hardturn-section--light\" id=\"process-data\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-case-panel\">\r\n        <div class=\"onmy-hardturn-case-copy\">\r\n          <div class=\"onmy-hardturn-eyebrow\">Application Review<\/div>\r\n          <h2>Information Needed for a Hard-Turning Recommendation<\/h2>\r\n          <p>\r\n            Accurate selection requires the actual workpiece condition and current process result,\r\n            not only the insert code.\r\n          <\/p>\r\n          <div class=\"onmy-hardturn-btn-row\">\r\n            <a class=\"onmy-hardturn-btn onmy-hardturn-btn--primary\" href=\"#quote\">Send Hard-Turning Conditions<\/a>\r\n          <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"onmy-hardturn-case-list\">\r\n          <div class=\"onmy-hardturn-case-item\"><strong>Material and Hardness<\/strong><span>Steel grade, hardness range, hardened case and stock condition<\/span><\/div>\r\n          <div class=\"onmy-hardturn-case-item\"><strong>Cutting Continuity<\/strong><span>Continuous, light-interrupted or heavy-interrupted surface<\/span><\/div>\r\n          <div class=\"onmy-hardturn-case-item\"><strong>Insert and Holder<\/strong><span>Full insert code, holder code, orientation and overhang<\/span><\/div>\r\n          <div class=\"onmy-hardturn-case-item\"><strong>Cutting Data<\/strong><span>Speed, feed, depth of cut and dry\/wet condition<\/span><\/div>\r\n          <div class=\"onmy-hardturn-case-item\"><strong>Current Tool Life<\/strong><span>Parts per edge, minutes in cut or measured wear limit<\/span><\/div>\r\n          <div class=\"onmy-hardturn-case-item\"><strong>Target Result<\/strong><span>Surface finish, tolerance, cycle time and expected quantity<\/span><\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"onmy-hardturn-section\" id=\"faq\">\r\n    <div class=\"onmy-hardturn-wrap\">\r\n      <div class=\"onmy-hardturn-section-head--center\">\r\n        <div class=\"onmy-hardturn-eyebrow\">Hard Turning FAQ<\/div>\r\n        <h2 class=\"onmy-hardturn-heading\">CBN Inserts for Hard Turning: Common Questions<\/h2>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-faq\">\r\n        <details>\r\n          <summary>Why are CBN inserts used for hard turning?<\/summary>\r\n          <p>CBN and PCBN inserts combine high hot hardness and wear resistance, making them suitable for turning hardened steels and selected abrasive materials where carbide may wear too quickly.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Which PCBN grade is suitable for continuous hard turning?<\/summary>\r\n          <p>Wear-focused lower-CBN grades are commonly selected for stable finishing. The final grade depends on hardness, speed, stock consistency, required finish and insert-code availability.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Which grade should I use for interrupted hard turning?<\/summary>\r\n          <p>As interruption increases, a tougher grade and more stable geometry are generally required. Edge preparation, setup rigidity and actual impact level also affect the choice.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Can CBN inserts turn case-hardened steel?<\/summary>\r\n          <p>Yes, provided the hardened layer, hardness range, stock allowance and transition into softer material are considered when selecting the grade and cutting edge.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>Which insert shape is best for hard turning?<\/summary>\r\n          <p>C, S and W shapes offer stable cutting bodies, while D and V shapes improve profile access. The best shape depends on holder style, component geometry and interruption level.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>How do I improve surface finish in hard turning?<\/summary>\r\n          <p>Review nose radius, feed, machine rigidity, insert seating, edge wear and component support. A grade change alone may not solve vibration or geometry-related finish problems.<\/p>\r\n        <\/details>\r\n        <details>\r\n          <summary>What information is needed for a hard-turning quotation?<\/summary>\r\n          <p>Provide the insert code, material, hardness, cutting condition, current cutting data, tool life, surface-finish target and required quantity.<\/p>\r\n        <\/details>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"onmy-hardturn-section onmy-hardturn-quote\" id=\"quote\">\r\n    <div class=\"onmy-hardturn-wrap onmy-hardturn-quote-grid\">\r\n      <div>\r\n        <div class=\"onmy-hardturn-eyebrow\">Request a Recommendation<\/div>\r\n        <h2>Send Your Hard-Turning Application<\/h2>\r\n        <p>\r\n          Share the material, hardness, insert code and current process.\r\n          Our team will review the PCBN grade, geometry and quotation.\r\n        <\/p>\r\n        <ul>\r\n          <li>Workpiece material and hardness<\/li>\r\n          <li>Continuous or interrupted cutting condition<\/li>\r\n          <li>Insert and holder code<\/li>\r\n          <li>Cutting speed, feed and depth of cut<\/li>\r\n          <li>Current tool life and failure mode<\/li>\r\n          <li>Required quantity and target result<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"onmy-hardturn-quote-box\">\r\n        <h3>Get a Hard-Turning Grade Recommendation<\/h3>\r\n        <div class=\"onmy-existing-form\">\r\n          <div class=\"wpforms-container \" id=\"wpforms-1078\"><form id=\"wpforms-form-1078\" class=\"wpforms-validate wpforms-form\" data-formid=\"1078\" method=\"post\" enctype=\"multipart\/form-data\" action=\"\/ja\/wp-json\/wp\/v2\/pages\/19044\" data-token=\"5b93987652a153ada4951d4963659eb3\" data-token-time=\"1784202457\"><noscript class=\"wpforms-error-noscript\">\u3053\u306e\u30d5\u30a9\u30fc\u30e0\u306b\u5165\u529b\u3059\u308b\u306b\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u30fc\u3067 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