{"product_id":"sumitomo-tnmg160404n-gu-ac820p-carbide-insert","title":"Sumitomo TNMG160404N-GU AC820P Carbide Insert (TNMG 331-GU)","description":"\u003cstyle\u003e\n  \/* Industrial Theme Styles \u0026 Reset *\/\n  .cnc-pdp-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #2d3748;\n    line-height: 1.6;\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 10px;\n    background-color: #ffffff;\n    user-select: text;\n    -webkit-user-select: text;\n  }\n  \n  .cnc-pdp-container * {\n    box-sizing: border-box;\n  }\n\n  \/* Typography \u0026 Colors *\/\n  .cnc-h1 {\n    background-color: #47479F;\n    color: #ffffff !important;\n    padding: 20px;\n    font-size: 1.8rem;\n    font-weight: 700;\n    border-radius: 6px;\n    margin-bottom: 25px;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n  }\n\n  .cnc-h2 {\n    color: #47479F;\n    font-size: 1.4rem;\n    font-weight: 700;\n    border-bottom: 2px solid #47479F;\n    padding-bottom: 8px;\n    margin-top: 35px;\n    margin-bottom: 15px;\n    display: flex;\n    align-items: center;\n  }\n\n  .cnc-h3 {\n    font-size: 1.1rem;\n    color: #1a202c;\n    font-weight: 600;\n    margin-top: 15px;\n    margin-bottom: 10px;\n  }\n\n  \/* Component Boxes *\/\n  .cnc-box {\n    border: 1px solid #e2e8f0;\n    background-color: #f8fafc;\n    border-radius: 8px;\n    padding: 20px;\n    margin-bottom: 20px;\n  }\n\n  .cnc-dark-box {\n    background-color: #1a202c;\n    color: #ffffff !important;\n    border-radius: 8px;\n    padding: 20px;\n    margin-bottom: 20px;\n  }\n\n  .cnc-dark-box p, .cnc-dark-box span, .cnc-dark-box td, .cnc-dark-box th, .cnc-dark-box h3 {\n    color: #ffffff !important;\n  }\n\n  \/* ISO Code Breakdown Grid *\/\n  .iso-grid {\n    display: grid;\n    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));\n    gap: 10px;\n    margin: 15px 0;\n  }\n\n  .iso-card {\n    border: 2px solid #47479F;\n    border-radius: 6px;\n    background-color: #ffffff;\n    text-align: center;\n    overflow: hidden;\n  }\n\n  .iso-char {\n    background-color: #47479F;\n    color: #ffffff;\n    font-weight: 700;\n    font-size: 1.2rem;\n    padding: 6px 0;\n  }\n\n  .iso-desc {\n    padding: 8px 4px;\n    font-size: 0.75rem;\n    color: #4a5568;\n    font-weight: 600;\n  }\n\n  \/* Toolholder Link Box *\/\n  .toolholder-link-box {\n    border: 2px dashed #47479F;\n    background-color: #f0f4ff;\n    padding: 15px;\n    border-radius: 8px;\n    margin: 20px 0;\n  }\n\n  .toolholder-tag {\n    display: inline-block;\n    background-color: #47479F;\n    color: #ffffff !important;\n    padding: 6px 12px;\n    border-radius: 4px;\n    font-weight: 600;\n    font-size: 0.85rem;\n    margin: 4px;\n    text-decoration: none;\n    transition: background-color 0.2s ease;\n  }\n\n  .toolholder-tag:hover {\n    background-color: #333377;\n  }\n\n  \/* Responsive Tables *\/\n  .table-responsive {\n    width: 100%;\n    overflow-x: auto;\n    margin-bottom: 20px;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .cnc-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.9rem;\n    text-align: left;\n  }\n\n  .cnc-table th {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 10px;\n    font-weight: 600;\n    border: 1px solid #cbd5e0;\n  }\n\n  .cnc-table td {\n    padding: 10px;\n    border: 1px solid #e2e8f0;\n  }\n\n  .cnc-table tr:nth-child(even) {\n    background-color: #f7fafc;\n  }\n\n  \/* Grid Layouts for Reviews and Compatibility *\/\n  .reviews-grid {\n    display: grid;\n    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));\n    gap: 15px;\n    margin-top: 15px;\n  }\n\n  .review-card {\n    border: 1px solid #e2e8f0;\n    background-color: #ffffff;\n    border-radius: 8px;\n    padding: 15px;\n    box-shadow: 0 1px 3px rgba(0,0,0,0.05);\n  }\n\n  .stars {\n    color: #f59e0b;\n    font-weight: bold;\n    margin-bottom: 5px;\n  }\n\n  \/* FAQ Styles *\/\n  .faq-item {\n    border-left: 4px solid #47479F;\n    background-color: #f8fafc;\n    padding: 15px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n\n  .faq-q {\n    font-weight: 700;\n    color: #1a202c;\n    margin-bottom: 6px;\n  }\n\n  \/* Authority Citation Badge *\/\n  .authority-badge {\n    font-size: 0.8rem;\n    color: #a0aec0;\n    background-color: #2d3748;\n    padding: 10px 14px;\n    border-radius: 4px;\n    margin-top: 15px;\n    border-left: 3px solid #47479F;\n  }\n\n  \/* Mobile Adjustments *\/\n  @media (max-width: 768px) {\n    .cnc-h1 { font-size: 1.3rem; padding: 15px; }\n    .cnc-h2 { font-size: 1.15rem; }\n    .iso-grid { grid-template-columns: repeat(3, 1fr); }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"cnc-pdp-container\"\u003e\n\u003c!-- H1 Title --\u003e\n\u003ch1 class=\"cnc-h1\"\u003eSumitomo TNMG160404N-GU AC820P Carbide Insert | ISO TNMG 160404-GU (ANSI TNMG 331-GU)\u003c\/h1\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e1. Product Overview\u003c\/h2\u003e\n\u003cdiv class=\"cnc-box\"\u003e\n\u003cp\u003e\u003cstrong\u003eWhich turning insert is best for general-to-high-speed steel turning, crater wear resistance, and high-efficiency production?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSumitomo TNMG160404N-GU AC820P\u003c\/strong\u003e (ANSI Designation: \u003cstrong\u003eTNMG 331-GU\u003c\/strong\u003e) is a double-sided 60° triangular indexable carbide turning insert engineered for general-purpose to high-speed turning across ISO P05–P25 steel applications. Powered by Sumitomo’s industry-leading \u003cstrong\u003eAC820P CVD Coating Grade\u003c\/strong\u003e with Absotech® coating technology, it features a smooth Al\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e \/ TiCN multi-layer structure applied over a tough carbide substrate. This engineered surface dramatically reduces friction, prevents crater wear, and delivers long, stable tool life during continuous steel machining.\u003c\/p\u003e\n\u003cp\u003eFeaturing the highly versatile \u003cstrong\u003eGU Universal Chipbreaker\u003c\/strong\u003e, this insert incorporates a 3D bump geometry designed to lower cutting forces while controlling chips efficiently across a wide envelope of depths of cut (a\u003csub\u003ep\u003c\/sub\u003e: 0.8mm to 3.5mm) and feed rates (f\u003csub\u003en\u003c\/sub\u003e: 0.12mm to 0.40mm). It is the ideal workhorse insert for carbon steel, alloy steel, and structural steel turning on production CNC lathes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- 2. Product Key Features --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e2. Product Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e6 Usable Cutting Edges:\u003c\/strong\u003e Negative 60° triangular geometry provides 6 sharp, durable cutting corners for optimal tooling cost efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbsotech® AC820P Grade:\u003c\/strong\u003e Superior smooth CVD coating technology offering exceptional crater and flank wear resistance at high cutting speeds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGU General-Purpose Chipbreaker:\u003c\/strong\u003e Optimizes chip curling and evacuation to avoid stringy chips and machine downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Cutting Resistance:\u003c\/strong\u003e Reduced radial force lowers vibration and workpiece deflection on long, slender shafts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual ISO \/ ANSI Standard Compliance:\u003c\/strong\u003e Manufactured in strict accordance with ISO 1832 and ANSI B212.4 standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003c!-- ISO\/ANSI Letter-by-Letter Designation Breakdown --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003eISO \/ ANSI Code Nomenclature Breakdown\u003c\/h2\u003e\n\u003cp\u003eDetailed geometric interpretation of the \u003cstrong\u003eTNMG160404N-GU\u003c\/strong\u003e specification standard:\u003c\/p\u003e\n\u003cdiv class=\"iso-grid\"\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003eT\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003eTriangular Shape (60° Corner Angle)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003eN\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003e0° Normal Clearance Angle (Negative)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003eM\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003eTolerance Class (Medium Precision)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003eG\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003eDouble-Sided with Pin Hole \u0026amp; Chipbreaker\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003e16\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003e16.5mm Edge Length (3\/8\" i.C.)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003e04\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003e4.76mm Thickness (3\/16\")\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003e04\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003e0.4mm Corner Radius (1\/64\")\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-card\"\u003e\n\u003cdiv class=\"iso-char\"\u003eN-GU\u003c\/div\u003e\n\u003cdiv class=\"iso-desc\"\u003eGU Breaker (General \/ Medium-Roughing)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- 3. Technical Parameters \u0026 Metric vs Imperial Comparison --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e3. Technical Parameters \u0026amp; Metric vs Imperial Comparison\u003c\/h2\u003e\n\u003cdiv class=\"table-responsive\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification Parameter\u003c\/th\u003e\n\u003cth\u003eMetric Value (ISO Designation)\u003c\/th\u003e\n\u003cth\u003eImperial Value (ANSI Designation)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Model Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTNMG160404N-GU AC820P\u003c\/td\u003e\n\u003ctd\u003eTNMG 331-GU AC820P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInscribed Circle (i.C.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10.0 mm\u003c\/td\u003e\n\u003ctd\u003e0.375\" (3\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness (S)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.76 mm\u003c\/td\u003e\n\u003ctd\u003e0.1875\" (3\/16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCorner Radius (r\u003csub\u003ee\u003c\/sub\u003e)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4 mm\u003c\/td\u003e\n\u003ctd\u003e0.0156\" (1\/64\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFixing Hole Diameter (d\u003csub\u003e1\u003c\/sub\u003e)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.81 mm\u003c\/td\u003e\n\u003ctd\u003e0.150\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsert Substrate Grade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSumitomo AC820P (CVD Al\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e\/TiCN Wear-Resistant)\u003c\/td\u003e\n\u003ctd\u003eSumitomo AC820P (CVD Al\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e\/TiCN Wear-Resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"cnc-h3\"\u003eRecommended Speeds \u0026amp; Feeds (Cutting Parameters)\u003c\/h3\u003e\n\u003cdiv class=\"table-responsive\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material Group\u003c\/th\u003e\n\u003cth\u003eCutting Speed (V\u003csub\u003ec\u003c\/sub\u003e)\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f\u003csub\u003en\u003c\/sub\u003e)\u003c\/th\u003e\n\u003cth\u003eDepth of Cut (a\u003csub\u003ep\u003c\/sub\u003e)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eISO P: Carbon Steel (1045 \/ C45 Continuous)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180 - 350 m\/min\u003cbr\u003e\u003ci\u003e(590 - 1150 SFM)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.15 - 0.40 mm\/rev\u003cbr\u003e\u003ci\u003e(0.006 - 0.016 IPR)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.0 - 3.5 mm\u003cbr\u003e\u003ci\u003e(0.039 - 0.138 in)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eISO P: Alloy Steel (4140 \/ 4340 High Speed)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 - 300 m\/min\u003cbr\u003e\u003ci\u003e(490 - 980 SFM)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.35 mm\/rev\u003cbr\u003e\u003ci\u003e(0.005 - 0.014 IPR)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.8 - 3.0 mm\u003cbr\u003e\u003ci\u003e(0.031 - 0.118 in)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eISO P: Cast Steel \u0026amp; Structural Steel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e140 - 280 m\/min\u003cbr\u003e\u003ci\u003e(460 - 920 SFM)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.32 mm\/rev\u003cbr\u003e\u003ci\u003e(0.005 - 0.013 IPR)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.8 - 3.0 mm\u003cbr\u003e\u003ci\u003e(0.031 - 0.118 in)\u003c\/i\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Corresponding Toolholder Links Box --\u003e\n\u003cdiv class=\"toolholder-link-box\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #47479f; margin-bottom: 8px;\"\u003eCompatible Toolholders (Direct Links):\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 10px 0; font-size: 0.9rem;\"\u003eFits all standard ISO turning toolholders with a 60° negative pocket design:\u003c\/p\u003e\n\u003ca href=\"https:\/\/cnchome-beyond.com\/collections\/tn-insert-multi-lock-system\" target=\"_blank\" rel=\"noopener\"\u003eMTJNR \/ MTJNL 2020K16 Holder MTJNR \/ MTJNL 2525M16 Holder WTJNR \/ WTJNL 2020K16 Holder DTJNR \/ DTJNL 2525M16 Holder Boring Bar: S25S-MTJNR16\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- 4. Applications --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e4. Applications \u0026amp; Industrial Operations\u003c\/h2\u003e\n\u003cdiv class=\"cnc-box\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Shaft \u0026amp; Axle Turning:\u003c\/strong\u003e Machining 1045 carbon steel shafts and drive components at elevated cutting speeds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-to-Rough Steel Profiling:\u003c\/strong\u003e General lathe production of alloy steel components demanding predictable, extended tool life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMass Production CNC Machining:\u003c\/strong\u003e Excellent for automated CNC lathe cells where reliable chip breaking prevents chip tangling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e5. Compatibility \u0026amp; Machine Integration\u003c\/h2\u003e\n\u003cp\u003eFully compatible with all CNC turning lathes, horizontal\/vertical turning centers, and engine lathes. Fits standard ISO TNMG160404 \/ ANSI TNMG 331 toolholders from Sandvik Coromant, Kennametal, Iscar, Kyocera, Tungaloy, Walter, and Seco.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c!-- 6. Grade Comparison \u0026 Equivalent Models Matrix --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e6. Grade Comparison \u0026amp; Equivalent Models Matrix\u003c\/h2\u003e\n\u003cdiv class=\"table-responsive\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eEquivalent Grade\u003c\/th\u003e\n\u003cth\u003eEquivalent Chipbreaker\u003c\/th\u003e\n\u003cth\u003eISO Material Application\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSumitomo Electric\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAC820P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eGU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eISO P05-P25\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSandvik Coromant\u003c\/td\u003e\n\u003ctd\u003eGC4425 \/ GC4325\u003c\/td\u003e\n\u003ctd\u003ePM \/ PR\u003c\/td\u003e\n\u003ctd\u003eISO P15-P25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKennametal\u003c\/td\u003e\n\u003ctd\u003eKCP10B \/ KCP25B\u003c\/td\u003e\n\u003ctd\u003eMP \/ MS\u003c\/td\u003e\n\u003ctd\u003eISO P10-P25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIscar\u003c\/td\u003e\n\u003ctd\u003eIC8150 \/ IC8250\u003c\/td\u003e\n\u003ctd\u003eM3P \/ GN\u003c\/td\u003e\n\u003ctd\u003eISO P10-P25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKyocera\u003c\/td\u003e\n\u003ctd\u003eCA515 \/ CA525\u003c\/td\u003e\n\u003ctd\u003eMU \/ MG\u003c\/td\u003e\n\u003ctd\u003eISO P10-P25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- 7. Why Choose Us \u0026 Customer Reviews --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e7. Why Choose Us?\u003c\/h2\u003e\n\u003cdiv class=\"cnc-box\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% Guaranteed Original Sumitomo:\u003c\/strong\u003e Direct factory authorization channels ensure authentic Absotech® coating quality and performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTechnical Machining Support:\u003c\/strong\u003e Professional guidance on optimizing feeds, speeds, and grade selection from senior CNC tooling specialists.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Dispatch \u0026amp; Industrial Packaging:\u003c\/strong\u003e Original 10-piece factory box packaging ready for immediate global express shipping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Real Customer Reviews --\u003e\n\u003ch3 class=\"cnc-h3\"\u003eVerified Customer Reviews\u003c\/h3\u003e\n\u003cdiv class=\"reviews-grid\"\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eExceptional tool life at high SFM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\"We run 1045 steel shafts at 850 SFM. The AC820P grade shows virtually no crater wear after long runs. The GU breaker keeps chips short and manageable.\"\u003c\/p\u003e\n\u003csmall\u003e— David R., Machine Shop Supervisor (United States 🇺🇸)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eHervorragende Standzeit bei C45 Stahl\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\"Sehr zuverlässige Wendeschneidplatte für die Serienfertigung. Absotech-Beschichtung hält die Schnittkante extrem lange scharf.\"\u003c\/p\u003e\n\u003csmall\u003e— Stefan W., CNC-Fertigungsleiter (Germany 🇩🇪)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eGrande stabilità e durata del tagliente\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\"Ottimi inserti per tornitura ad alta velocità su acciaio legato. Nessun problema di usura precoce.\"\u003c\/p\u003e\n\u003csmall\u003e— Matteo R., Capo Officina (Italy 🇮🇹)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e鋼材の高速連続加工で抜群の耐摩耗性を発揮\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\"AC820PはC45の高速旋削でクレーター摩耗が劇的に抑えられます。GUブレーカのチップコントロールも極めて良好です。\"\u003c\/p\u003e\n\u003csmall\u003e— Kenji T., Manufacturing Engineer (Japan 🇯🇵)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eConsistent production turning insert\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\"Delivers reliable performance and smooth surface finishes on 4140 steel stock.\"\u003c\/p\u003e\n\u003csmall\u003e— Jason M., CNC Turner (United Kingdom 🇬🇧)\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- 8. AI-Style FAQ --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003e8. Frequently Asked Questions (AI \u0026amp; Voice Search Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: What is the main difference between Sumitomo AC820P and AC830P grades?\u003c\/div\u003e\n\u003cdiv class=\"faq-r\"\u003eA: AC820P is optimized for high-speed continuous to light interrupted turning (ISO P05–P25) where wear resistance is paramount. AC830P is a tougher grade engineered for heavy interrupted cuts and impact roughing (ISO P25–P40).\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: What is the ANSI designation for TNMG160404N-GU?\u003c\/div\u003e\n\u003cdiv class=\"faq-r\"\u003eA: The equivalent ANSI designation is TNMG 331-GU, representing a 3\/8\" inscribed circle, 3\/16\" thickness, and 1\/64\" (0.4mm) corner radius.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Can the GU chipbreaker handle both medium turning and light roughing?\u003c\/div\u003e\n\u003cdiv class=\"faq-r\"\u003eA: Yes, the GU breaker features an all-around 3D geometry designed specifically to handle depths of cut from 0.8mm up to 3.5mm across various feed rates.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- Troubleshooting Section --\u003e\n\u003csection\u003e\n\u003ch2 class=\"cnc-h2\"\u003eTroubleshooting \u0026amp; Machining Optimization Guide\u003c\/h2\u003e\n\u003cdiv class=\"table-responsive\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSymptom \/ Failure Mode\u003c\/th\u003e\n\u003cth\u003eRoot Cause Analysis\u003c\/th\u003e\n\u003cth\u003eRecommended Action\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlank \/ Crater Wear Rate Too High\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCutting speed V\u003csub\u003ec\u003c\/sub\u003e exceeds recommended envelope or insufficient coolant flow.\u003c\/td\u003e\n\u003ctd\u003eReduce cutting speed V\u003csub\u003ec\u003c\/sub\u003e by 10-15% or optimize coolant positioning directly at the cutting edge.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChipping \/ Edge Micro-Fracture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInterrupted cut forces too heavy for general-purpose grade AC820P.\u003c\/td\u003e\n\u003ctd\u003eSwitch to tougher AC830P grade or slightly decrease feed rate f\u003csub\u003en\u003c\/sub\u003e upon cut entry.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLong Stringy Chips \/ Nesting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDepth of cut a\u003csub\u003ep\u003c\/sub\u003e or feed rate f\u003csub\u003en\u003c\/sub\u003e below GU chipbreaker activation threshold.\u003c\/td\u003e\n\u003ctd\u003eIncrease feed rate f\u003csub\u003en\u003c\/sub\u003e above 0.15 mm\/rev or increase depth of cut a\u003csub\u003ep\u003c\/sub\u003e to properly engage the chip breaker bump.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- Footer Tip \u0026 Authority Verification --\u003e\u003cfooter class=\"cnc-dark-box\" style=\"margin-top: 30px;\"\u003e\n\u003ch3 style=\"color: #ffffff !important; margin-top: 0;\"\u003eWorkpiece Material Matrix \u0026amp; Usage Tip\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eISO P (Carbon Steel, Alloy Steel, Tool Steel):\u003c\/strong\u003e Primary domain for AC820P grade. Maintain recommended cutting speeds (180–350 m\/min) to fully utilize the crater-resistant properties of the Absotech® CVD coating layer.\u003c\/p\u003e\n\u003cdiv class=\"authority-badge\"\u003e\n\u003cstrong\u003eVerified Technical Reference:\u003c\/strong\u003e Manufactured in strict accordance with ISO 1832:2017 (Indexable inserts for cutting tools — Designation) and ISO 513:2012 (Classification and application of hard cutting materials). Technical parameters verified against Sumitomo Electric Hardmetal Global Tooling Standards.\u003c\/div\u003e\n\u003c\/footer\u003e\n\u003c\/div\u003e","brand":"Sumitomo","offers":[{"title":"Default Title","offer_id":43396416798892,"sku":"TNMG160404N-GU AC820P","price":65.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/Sumitomo_TNMG160404N-GU_AC820P_carbide_turning_insert_top_view.jpg?v=1786865884","url":"https:\/\/cnchome-beyond.com\/products\/sumitomo-tnmg160404n-gu-ac820p-carbide-insert","provider":"CNCHome-Beyond","version":"1.0","type":"link"}