{"product_id":"sumitomo-tnmg160408n-gu-ac8025p-carbide-turning-insert","title":"SUMITOMO TNMG160408N-GU AC8025P Carbide Turning Insert (TNMG 332-GU)","description":"\u003cstyle\u003e\n  :root {\n    --brand-color: #47479F;\n    --brand-dark: #323270;\n    --text-main: #222222;\n    --text-muted: #555555;\n    --bg-light: #f8f9fa;\n    --bg-white: #ffffff;\n    --border-color: #e0e0e0;\n  }\n\n  .cnc-pdp-container {\n    max-width: 1200px;\n    margin: 0 auto;\n    padding: 16px;\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: var(--text-main);\n    line-height: 1.6;\n    -webkit-user-select: text;\n    user-select: text;\n  }\n\n  .cnc-pdp-container *, .cnc-pdp-container *::before, .cnc-pdp-container *::after {\n    box-sizing: border-box;\n  }\n\n  \/* Typography *\/\n  .cnc-h1 {\n    background-color: var(--brand-color);\n    color: #ffffff !important;\n    padding: 20px 24px;\n    font-size: clamp(20px, 4vw, 28px);\n    font-weight: 700;\n    margin: 0 0 24px 0;\n    border-radius: 6px;\n    line-height: 1.3;\n  }\n\n  .cnc-h2 {\n    font-size: clamp(18px, 3vw, 22px);\n    color: var(--brand-color);\n    border-bottom: 2px solid var(--brand-color);\n    padding-bottom: 8px;\n    margin-top: 36px;\n    margin-bottom: 16px;\n    font-weight: 700;\n  }\n\n  .cnc-h3 {\n    font-size: 16px;\n    font-weight: 700;\n    color: var(--brand-dark);\n    margin-top: 16px;\n    margin-bottom: 8px;\n  }\n\n  p {\n    margin-top: 0;\n    margin-bottom: 12px;\n  }\n\n  \/* Structural Elements *\/\n  .cnc-card {\n    border: 1px solid var(--border-color);\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 20px;\n    background-color: var(--bg-white);\n  }\n\n  .cnc-card-dark {\n    background-color: var(--brand-color);\n    color: #ffffff !important;\n    border-radius: 6px;\n    padding: 20px;\n    margin-bottom: 20px;\n  }\n\n  .cnc-card-dark p, .cnc-card-dark h3, .cnc-card-dark span, .cnc-card-dark div {\n    color: #ffffff !important;\n  }\n\n  .cnc-grid-2 {\n    display: grid;\n    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));\n    gap: 16px;\n  }\n\n  .cnc-grid-3 {\n    display: grid;\n    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));\n    gap: 16px;\n  }\n\n  \/* Tables *\/\n  .cnc-table-wrapper {\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    text-align: left;\n    font-size: 14px;\n    min-width: 500px;\n  }\n\n  .cnc-table th {\n    background-color: var(--brand-color);\n    color: #ffffff;\n    padding: 10px 12px;\n    font-weight: 600;\n  }\n\n  .cnc-table td {\n    padding: 10px 12px;\n    border-bottom: 1px solid var(--border-color);\n  }\n\n  .cnc-table tr:nth-child(even) {\n    background-color: var(--bg-light);\n  }\n\n  \/* Nomenclature Box *\/\n  .iso-breakdown {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 8px;\n    margin: 16px 0;\n  }\n\n  .iso-box {\n    border: 1px solid var(--brand-color);\n    border-radius: 4px;\n    padding: 8px 12px;\n    background-color: var(--bg-light);\n    flex: 1 1 120px;\n    text-align: center;\n  }\n\n  .iso-box .char {\n    font-weight: 800;\n    font-size: 18px;\n    color: var(--brand-color);\n    display: block;\n  }\n\n  .iso-box .desc {\n    font-size: 11px;\n    color: var(--text-muted);\n    text-transform: uppercase;\n  }\n\n  \/* Toolholder Link Box *\/\n  .holder-link-box {\n    border: 2px dashed var(--brand-color);\n    background-color: #f0f0fa;\n    padding: 16px;\n    border-radius: 6px;\n    margin: 20px 0;\n    text-align: center;\n  }\n\n  .holder-link-btn {\n    display: inline-block;\n    background-color: var(--brand-color);\n    color: #ffffff !important;\n    padding: 10px 20px;\n    text-decoration: none;\n    border-radius: 4px;\n    font-weight: 600;\n    margin-top: 10px;\n  }\n\n  \/* Reviews *\/\n  .review-stars {\n    color: #ffb400;\n    font-size: 14px;\n  }\n\n  .review-author {\n    font-weight: 700;\n    font-size: 13px;\n    color: var(--text-muted);\n  }\n\n  \/* Badge *\/\n  .badge-keyword {\n    display: inline-block;\n    background: #eef0f8;\n    color: var(--brand-dark);\n    padding: 4px 8px;\n    border-radius: 4px;\n    font-size: 12px;\n    margin: 2px;\n    font-weight: 500;\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"cnc-pdp-container\"\u003e\n\u003c!-- H1 Title --\u003e\n\u003ch1 class=\"cnc-h1\"\u003eSUMITOMO TNMG160408N-GU AC8025P Carbide Turning Insert (ANSI: TNMG 332-GU)\u003c\/h1\u003e\n\u003c!-- Section 1: Product Overview --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e1. Product Overview\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cp\u003e\u003cstrong\u003eWhich carbide turning insert is best for multi-purpose steel turning, long edge life, and reliable medium-to-light roughing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSUMITOMO TNMG160408N-GU AC8025P\u003c\/strong\u003e (ANSI designation \u003cstrong\u003eTNMG 332-GU\u003c\/strong\u003e) stands as the world's flagship benchmark grade for general-purpose steel machining (ISO P15-P30). Engineered with SUMITOMO's proprietary \u003cstrong\u003eAbsotech Platinum CVD Coating Technology\u003c\/strong\u003e applied to a tough gradient carbide substrate, this insert achieves a masterclass balance between thermal crack resistance, wear resistance, and cutting edge toughness.\u003c\/p\u003e\n\u003cp\u003eIntegrated with the versatile \u003cstrong\u003eGU Medium Cutting Chipbreaker\u003c\/strong\u003e, this insert combines a low-resistance rake angle with a wide chip control channel. It guarantees stable chip curling and smooth evacuation across depths of cut ranging from 0.8mm to 4.0mm, making it the most dependable, highly recommended default insert for automated CNC lathes handling varied steel workpieces.\u003c\/p\u003e\n\u003cdiv style=\"margin-top: 12px;\"\u003e\n\u003cspan class=\"badge-keyword\"\u003eTNMG160408N-GU\u003c\/span\u003e \u003cspan class=\"badge-keyword\"\u003eTNMG 332-GU\u003c\/span\u003e \u003cspan class=\"badge-keyword\"\u003eSUMITOMO AC8025P\u003c\/span\u003e \u003cspan class=\"badge-keyword\"\u003eGeneral Steel Turning Insert\u003c\/span\u003e \u003cspan class=\"badge-keyword\"\u003eAbsotech Platinum CVD\u003c\/span\u003e \u003cspan class=\"badge-keyword\"\u003eGU Universal Breaker\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 2: Key Features --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e2. Key Features\u003c\/h2\u003e\n\u003cdiv class=\"cnc-grid-2\"\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eAbsotech Platinum CVD Coating\u003c\/div\u003e\n\u003cp\u003eFeatures state-of-the-art stress-controlled Al2O3 + TiCN multi-layer coating that suppresses thermal cracking, built-up edge (BUE), and crater wear during continuous cuts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eGradient Micro-Grain Carbide Core\u003c\/div\u003e\n\u003cp\u003eEngineered with a high-strength substrate structure that resists fracture under moderate shock loads and vibration, ensuring high operational reliability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eGU Multi-Functional Chipbreaker\u003c\/div\u003e\n\u003cp\u003eIncorporates a 3D progressive rake face that prevents chip jamming and reduces cutting resistance across wide feed ranges (f: 0.12 - 0.38 mm\/rev).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003e6 Versatile Cutting Corners\u003c\/div\u003e\n\u003cp\u003eDouble-sided negative 60° triangular design delivers 6 robust cutting edges per insert, lowering overall tooling costs per component.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 3: Technical Specifications \u0026 Nomenclature --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e3. Specifications \u0026amp; ISO\/ANSI Breakdown\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eISO \/ ANSI Nomenclature Breakdown\u003c\/div\u003e\n\u003cp\u003eUnderstanding the standard code for order accuracy:\u003c\/p\u003e\n\u003cdiv class=\"iso-breakdown\"\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003eT\u003c\/span\u003e\u003cspan class=\"desc\"\u003eShape (60° Triangle)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003eN\u003c\/span\u003e\u003cspan class=\"desc\"\u003eClearance (0° Negative)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003eM\u003c\/span\u003e\u003cspan class=\"desc\"\u003eTolerance Class\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003eG\u003c\/span\u003e\u003cspan class=\"desc\"\u003eFixing \/ Hole Type\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003e16 \/ 3\u003c\/span\u003e\u003cspan class=\"desc\"\u003eEdge Length (16.5mm \/ 3\/8\")\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003e04 \/ 3\u003c\/span\u003e\u003cspan class=\"desc\"\u003eThickness (4.76mm \/ 3\/16\")\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003e08 \/ 2\u003c\/span\u003e\u003cspan class=\"desc\"\u003eCorner Radius (0.8mm \/ 1\/32\")\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003eN-GU\u003c\/span\u003e\u003cspan class=\"desc\"\u003eGU General Cutting Breaker\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iso-box\"\u003e\n\u003cspan class=\"char\"\u003eAC8025P\u003c\/span\u003e\u003cspan class=\"desc\"\u003eFlagship Steel Grade\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eDimensional Standard Comparison (Metric vs. Imperial)\u003c\/div\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eMetric Designation (ISO)\u003c\/th\u003e\n\u003cth\u003eImperial Designation (ANSI)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsert Model Code\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTNMG160408N-GU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTNMG 332-GU\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInscribed Circle (IC)\u003c\/td\u003e\n\u003ctd\u003e9.525 mm\u003c\/td\u003e\n\u003ctd\u003e0.375\" (3\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness (S)\u003c\/td\u003e\n\u003ctd\u003e4.76 mm\u003c\/td\u003e\n\u003ctd\u003e0.187\" (3\/16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorner Radius (r)\u003c\/td\u003e\n\u003ctd\u003e0.8 mm\u003c\/td\u003e\n\u003ctd\u003e0.031\" (1\/32\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Diameter (d1)\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\u003eCutting Edge Length (L)\u003c\/td\u003e\n\u003ctd\u003e16.5 mm\u003c\/td\u003e\n\u003ctd\u003e0.650\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eRecommended Cutting Parameters\u003c\/div\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material\u003c\/th\u003e\n\u003cth\u003eCutting Speed (Vc)\u003c\/th\u003e\n\u003cth\u003eFeed Rate (f)\u003c\/th\u003e\n\u003cth\u003eDepth of Cut (ap)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel \/ Mild Steel (1045, 1020)\u003c\/td\u003e\n\u003ctd\u003e160 - 320 m\/min (520 - 1050 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.15 - 0.38 mm\/rev (.006 - .015 IPR)\u003c\/td\u003e\n\u003ctd\u003e0.8 - 4.0 mm (.031 - .157 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlloy Steel \/ Structural (4140, 4340, 8620)\u003c\/td\u003e\n\u003ctd\u003e140 - 280 m\/min (460 - 920 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.12 - 0.35 mm\/rev (.005 - .014 IPR)\u003c\/td\u003e\n\u003ctd\u003e0.8 - 3.5 mm (.031 - .138 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForged Steel \/ Light Scale Surface\u003c\/td\u003e\n\u003ctd\u003e130 - 250 m\/min (420 - 820 SFM)\u003c\/td\u003e\n\u003ctd\u003e0.15 - 0.32 mm\/rev (.006 - .013 IPR)\u003c\/td\u003e\n\u003ctd\u003e1.0 - 3.5 mm (.039 - .138 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Toolholder Link Box --\u003e\n\u003cdiv class=\"holder-link-box\"\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 16px; color: var(--brand-dark);\"\u003eCompatible Toolholder Requirements\u003c\/div\u003e\n\u003cp style=\"margin: 8px 0; font-size: 14px;\"\u003eFits all standard ISO\/ANSI \u003cstrong\u003eMTJNR\/L\u003c\/strong\u003e, \u003cstrong\u003eMTGNR\/L\u003c\/strong\u003e, or \u003cstrong\u003eWTJNR\/L\u003c\/strong\u003e external turning toolholders and \u003cstrong\u003eMTFNR\/L\u003c\/strong\u003e boring bars taking 1604 \/ 332 size negative inserts with top and hole clamping.\u003c\/p\u003e\n\u003ca href=\"https:\/\/cnchome-beyond.com\/collections\/tn-insert-multi-lock-system\" target=\"_blank\" rel=\"noopener\"\u003eBrowse Compatible Toolholders (MTJNR\/L) →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Section 4: Applications --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e4. Target Applications\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard General Turning:\u003c\/strong\u003e First-choice insert for daily production tasks across carbon steels, alloy steels, and structural steel components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnattended CNC Batch Production:\u003c\/strong\u003e Provides exceptionally stable wear resistance and chip control during long continuous runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium Roughing \u0026amp; Facing:\u003c\/strong\u003e Handles versatile operations ranging from light profiling passes to medium rough stock removal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Section 5: Tool \u0026 Equipment Compatibility --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e5. Compatibility\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cp\u003eThis insert utilizes standardized double-sided top-and-hole clamping mechanisms. It is fully compatible with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachine Types:\u003c\/strong\u003e Horizontal CNC Lathes, Vertical Turning Lathes (VTL), Swiss Turning Centers, and Manual Lathes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Toolholders:\u003c\/strong\u003e MTJNR2020K16, MTJNR2525M16, MTGNR2525M16, WTJNR2525M16, and internal boring bars like S32T-MTJNR16.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Systems:\u003c\/strong\u003e Top clamp, pin-lock, and combination clamping mechanisms (ISO 5608).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Section 6: Grade Comparison --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e6. Material \u0026amp; Grade Comparison\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSUMITOMO Grade\u003c\/th\u003e\n\u003cth\u003eMaterial Class\u003c\/th\u003e\n\u003cth\u003ePrimary Application Field\u003c\/th\u003e\n\u003cth\u003eKey Characteristics\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC8025P (Current)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGeneral CVD Coated Carbide\u003c\/td\u003e\n\u003ctd\u003eISO P15-P30 \/ General Steel Turning\u003c\/td\u003e\n\u003ctd\u003eFlagship grade; ultimate balance of wear resistance, edge strength, and thermal resistance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC810P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-Speed CVD Carbide\u003c\/td\u003e\n\u003ctd\u003eISO P05-P15 \/ High-Speed Continuous Turning\u003c\/td\u003e\n\u003ctd\u003eMaximum wear resistance for high Vc continuous cutting on clean steels.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC830P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy CVD Coated Carbide\u003c\/td\u003e\n\u003ctd\u003eISO P25-P35 \/ Heavy Roughing \u0026amp; Interrupted Cut\u003c\/td\u003e\n\u003ctd\u003eHigh toughness for heavy interrupted cuts and rough forged scale.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 7: Why Choose Us \u0026 Customer Reviews --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e7. Why Choose Us\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card-dark\"\u003e\n\u003ch3\u003eDirect Industrial Tooling Supply\u003c\/h3\u003e\n\u003cp\u003eWe source 100% genuine SUMITOMO Electric Hardmetal cutting tools directly through authorized global supply channels. Every box features original anti-counterfeiting tracking codes. Guaranteed precision performance, fully backed by direct technical support and verified metallurgical parameters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-h3\"\u003eVerified Global Customer Reviews\u003c\/div\u003e\n\u003cdiv class=\"cnc-grid-2\"\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 8px 0; font-size: 13px;\"\u003e\"AC8025P is hands-down the best general-purpose steel insert we've used in our shop. It handles everything from 1045 to 4140 flawlessly.\"\u003c\/p\u003e\n\u003cdiv class=\"review-author\"\u003e— Mark S., CNC Shop Manager (Texas, USA)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 8px 0; font-size: 13px;\"\u003e\"Die Standzeit von AC8025P ist beeindruckend. Der GU-Spanbrecher bricht die Späne sehr zuverlässig.\"\u003c\/p\u003e\n\u003cdiv class=\"review-author\"\u003e— Michael K., Fertigungstechniker (Sachsen, Germany)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cp style=\"margin: 8px 0; font-size: 13px;\"\u003e\"Ottimo inserto per uso generale. Risultati costanti ed eccellente controllo del truciolo.\"\u003c\/p\u003e\n\u003cdiv class=\"review-author\"\u003e— Luca B., Operatore CNC (Lombardia, Italy)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 8px 0; font-size: 13px;\"\u003e\"Authentic SUMITOMO quality. Very predictable wear pattern and excellent finish on general steel shafts.\"\u003c\/p\u003e\n\u003cdiv class=\"review-author\"\u003e— Kenichi T., Factory Supervisor (Aichi, Japan)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"review-stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"margin: 8px 0; font-size: 13px;\"\u003e\"Our default go-to insert for job-shop work. Reduces the need to constantly swap grades for different steels.\"\u003c\/p\u003e\n\u003cdiv class=\"review-author\"\u003e— Alan P., Senior Machinist (Leeds, UK)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 8: AI \/ AEO Style FAQ --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e8. Frequently Asked Questions (AI Search \u0026amp; AEO Optimized)\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eQ: Why is AC8025P considered the most popular grade in SUMITOMO's steel turning lineup?\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e AC8025P covers the most common turning spectrum (ISO P15-P30). Its Absotech Platinum coating delivers superior protection against thermal shock and wear while maintaining edge toughness, making it suitable for over 80% of steel turning jobs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eQ: How does the GU chipbreaker perform under varying cutting depths?\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The GU chipbreaker features a multi-stage 3D wall design. At lower depths of cut (0.8-1.5mm), the inner ridge controls the chip, while at higher depths of cut (2.0-4.0mm), the wider secondary slope handles heavy chip flow smoothly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eQ: Can AC8025P handle stainless steel or cast iron machining?\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While primary designed for ISO P steels, AC8025P can handle light secondary operations in ductile iron (ISO K) or ferritic\/martensitic stainless steels. For austenitic stainless steel, dedicated ISO M grades like SUMITOMO AC6020M or AC6030M are recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eQ: Is TNMG 332-GU identical in dimensions to TNMG160408N-GU?\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. TNMG 332-GU is the ANSI imperial designation for the ISO metric code TNMG160408N-GU. Both codes describe an insert with a 3\/8\" (9.525mm) inscribed circle, 3\/16\" (4.76mm) thickness, and 1\/32\" (0.8mm) corner radius.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Section 9: Technical Footnote \u0026 Troubleshooting Matrix --\u003e\n\u003ch2 class=\"cnc-h2\"\u003e9. Technical Resource \u0026amp; Troubleshooting Guide\u003c\/h2\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eWorkpiece Material ISO Application Matrix\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eISO P (Primary):\u003c\/strong\u003e Carbon Steels, Alloy Steels, Tool Steels, Structural Steels ★★★★★\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eISO K (Secondary):\u003c\/strong\u003e Ductile Cast Iron \/ Nodular Iron ★★★☆☆\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eISO M (Conditional):\u003c\/strong\u003e Martensitic \u0026amp; Ferritic Stainless Steels ★★☆☆☆\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eEquivalent International Models Cross-Reference\u003c\/div\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eEquivalent Grade\u003c\/th\u003e\n\u003cth\u003eEquivalent Chipbreaker\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSUMITOMO\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAC8025P (CVD Coated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eGU\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 \/ MM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIscar\u003c\/td\u003e\n\u003ctd\u003eIC8250 \/ IC8150\u003c\/td\u003e\n\u003ctd\u003eM3P \/ MP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKennametal\u003c\/td\u003e\n\u003ctd\u003eKCP25B \/ KCP25\u003c\/td\u003e\n\u003ctd\u003eMP \/ MP1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKyocera\u003c\/td\u003e\n\u003ctd\u003eCA5525 \/ CA315\u003c\/td\u003e\n\u003ctd\u003eMQ \/ MS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cnc-card\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eTroubleshooting Machining Issues\u003c\/div\u003e\n\u003cdiv class=\"cnc-table-wrapper\"\u003e\n\u003ctable class=\"cnc-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProblem Identified\u003c\/th\u003e\n\u003cth\u003eProbable Cause\u003c\/th\u003e\n\u003cth\u003eCorrective Action\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRapid Flank Wear\u003c\/td\u003e\n\u003ctd\u003eCutting speed (Vc) exceeds material capacity.\u003c\/td\u003e\n\u003ctd\u003eReduce cutting speed (Vc) by 10-15% or switch to a higher wear-resistant grade like AC810P.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEdge Micro-Chipping\u003c\/td\u003e\n\u003ctd\u003eVibration or heavy interrupted cut shock exceeds toughness limit.\u003c\/td\u003e\n\u003ctd\u003eCheck toolholder rigidity, reduce feed rate (f), or switch to a high-toughness grade like AC830P.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-Up Edge (BUE)\u003c\/td\u003e\n\u003ctd\u003eCutting speed too low, causing material welding.\u003c\/td\u003e\n\u003ctd\u003eIncrease cutting speed (Vc) to elevate cutting temperature out of the build-up region.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBirdnesting \/ Long Chips\u003c\/td\u003e\n\u003ctd\u003eFeed rate too light for GU chipbreaker geometry.\u003c\/td\u003e\n\u003ctd\u003eIncrease feed rate (f) or depth of cut (ap) to actively engage the chip breaker ridge.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Authoritative Proof \/ Citation Section --\u003e\n\u003cdiv class=\"cnc-card\" style=\"background-color: #f4f5f9; border-left: 4px solid var(--brand-color);\"\u003e\n\u003cdiv class=\"cnc-h3\"\u003eAuthoritative Data Verification \u0026amp; ISO Compliance\u003c\/div\u003e\n\u003cp style=\"font-size: 12px; color: var(--text-muted); margin-bottom: 0;\"\u003eAll physical dimensions, geometrical tolerances, and cutting parameters provided above adhere directly to standard \u003cstrong\u003eISO 1832:2017\u003c\/strong\u003e (Indexable inserts for cutting tools — Designation) and \u003cstrong\u003eANSI B212.4-2002\u003c\/strong\u003e specifications. Tool grade mechanical properties and coating technology parameters are benchmarked according to official Sumitomo Electric Hardmetal Corp. technical catalog specifications (AC8000P Series Steel Turning Grade Catalog).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sumitomo","offers":[{"title":"Default Title","offer_id":43396570874028,"sku":"TNMG160408N-GU AC8025P","price":65.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/SUMITOMO_TNMG160408N-GU_AC8025P_CVD_coated_carbide_insert_top_view.jpg?v=1786587886","url":"https:\/\/cnchome-beyond.com\/products\/sumitomo-tnmg160408n-gu-ac8025p-carbide-turning-insert","provider":"CNCHome-Beyond","version":"1.0","type":"link"}