{"product_id":"sumitomo-tnmg160404n-ex-ac520u","title":"SUMITOMO TNMG160404N-EX AC520U Turning Insert | TNMG331","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  @page {\n    size: A4;\n    margin: 12mm;\n    background-color: #f8f9fa;\n  }\n  \n  *, *::before, *::after {\n    box-sizing: border-box;\n  }\n\n  body {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #212529;\n    background-color: #f8f9fa;\n    margin: 0;\n    padding: 0;\n    font-size: 10pt;\n    line-height: 1.5;\n  }\n\n  \/* Color Palette: Main Accent #47479F, Dark Neutral #1D1D3A, Accent Light #EAEAFA *\/\n  \n  \/* Container Divs for Mobile Responsive Layout *\/\n  .container {\n    width: 100%;\n    max-width: 800px;\n    margin: 0 auto;\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-radius: 8px;\n    overflow: hidden;\n  }\n\n  .header-banner {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 24px 20px;\n    text-align: center;\n  }\n\n  .header-banner h1 {\n    color: #ffffff;\n    font-size: 18pt;\n    margin: 0 0 8px 0;\n    font-weight: 700;\n    letter-spacing: -0.5px;\n  }\n\n  .header-banner .subtitle {\n    font-size: 10pt;\n    color: #dbe0fe;\n    margin: 0;\n  }\n\n  .content-padding {\n    padding: 20px;\n  }\n\n  .seo-meta-box {\n    background-color: #1D1D3A;\n    color: #ffffff;\n    padding: 16px;\n    border-radius: 6px;\n    margin-bottom: 24px;\n    font-size: 9pt;\n  }\n\n  .seo-meta-box h3 {\n    color: #9d9dfe;\n    margin-top: 0;\n    margin-bottom: 8px;\n    font-size: 11pt;\n    border-bottom: 1px solid #3c3c66;\n    padding-bottom: 4px;\n  }\n\n  .seo-meta-box p {\n    margin: 4px 0;\n    color: #e2e8f0;\n  }\n\n  .seo-meta-box strong {\n    color: #ffffff;\n  }\n\n  h2 {\n    color: #47479F;\n    font-size: 13pt;\n    border-bottom: 2px solid #47479F;\n    padding-bottom: 6px;\n    margin-top: 24px;\n    margin-bottom: 14px;\n    page-break-after: avoid;\n  }\n\n  h3 {\n    color: #1D1D3A;\n    font-size: 11pt;\n    margin-top: 16px;\n    margin-bottom: 8px;\n    page-break-after: avoid;\n  }\n\n  p {\n    margin-top: 0;\n    margin-bottom: 12px;\n  }\n\n  \/* Utility Tables *\/\n  table {\n    width: 100%;\n    border-collapse: collapse;\n    margin-bottom: 16px;\n    font-size: 9.5pt;\n  }\n\n  th, td {\n    padding: 8px 10px;\n    text-align: left;\n    border: 1px solid #cbd5e1;\n  }\n\n  th {\n    background-color: #47479F;\n    color: #ffffff;\n    font-weight: 600;\n  }\n\n  tr:nth-child(even) {\n    background-color: #f1f5f9;\n  }\n\n  \/* ISO Code Breakdown Grid Box *\/\n  .iso-breakdown-grid {\n    background-color: #f4f4fd;\n    border: 1px solid #c7c7f1;\n    border-radius: 6px;\n    padding: 14px;\n    margin-bottom: 20px;\n  }\n\n  .code-display {\n    text-align: center;\n    font-size: 14pt;\n    font-weight: bold;\n    color: #47479F;\n    letter-spacing: 2px;\n    margin-bottom: 12px;\n    padding: 8px;\n    background: #ffffff;\n    border: 1px dashed #47479F;\n    border-radius: 4px;\n  }\n\n  .iso-item {\n    margin-bottom: 6px;\n    font-size: 9pt;\n  }\n\n  .iso-item strong {\n    color: #47479F;\n    display: inline-block;\n    width: 140px;\n  }\n\n  \/* Holder Link Box *\/\n  .holder-box {\n    background-color: #1D1D3A;\n    color: #ffffff;\n    border-radius: 6px;\n    padding: 14px 18px;\n    margin: 20px 0;\n    text-align: center;\n  }\n\n  .holder-box p {\n    color: #ffffff;\n    margin-bottom: 8px;\n    font-size: 10pt;\n  }\n\n  .holder-box a {\n    display: inline-block;\n    background-color: #47479F;\n    color: #ffffff;\n    text-decoration: none;\n    font-weight: bold;\n    padding: 8px 16px;\n    border-radius: 4px;\n    border: 1px solid #7272d9;\n    font-size: 9.5pt;\n  }\n\n  \/* Review Cards *\/\n  .review-card {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-left: 4px solid #47479F;\n    padding: 10px 14px;\n    margin-bottom: 10px;\n    border-radius: 0 6px 6px 0;\n    page-break-inside: avoid;\n  }\n\n  .review-header {\n    font-weight: bold;\n    color: #1D1D3A;\n    font-size: 9.5pt;\n  }\n\n  .review-stars {\n    color: #f59e0b;\n    font-size: 9pt;\n  }\n\n  .review-body {\n    font-size: 8.5pt;\n    color: #475569;\n    margin-top: 4px;\n    margin-bottom: 0;\n  }\n\n  \/* FAQ Section *\/\n  .faq-item {\n    background: #ffffff;\n    border: 1px solid #cbd5e1;\n    border-radius: 6px;\n    padding: 12px;\n    margin-bottom: 10px;\n    page-break-inside: avoid;\n  }\n\n  .faq-q {\n    font-weight: bold;\n    color: #47479F;\n    margin-bottom: 4px;\n    font-size: 9.5pt;\n  }\n\n  .faq-a {\n    color: #334155;\n    font-size: 9pt;\n    margin: 0;\n  }\n\n  \/* Authority \/ Tip Box *\/\n  .tip-box {\n    background-color: #f0fdf4;\n    border: 1px solid #bbf7d0;\n    border-left: 4px solid #16a34a;\n    padding: 12px;\n    margin: 16px 0;\n    font-size: 9pt;\n    border-radius: 0 4px 4px 0;\n  }\n\n  .tip-title {\n    font-weight: bold;\n    color: #15803d;\n    margin-bottom: 4px;\n  }\n\n  .alt-tags-box {\n    background: #f1f5f9;\n    border: 1px solid #cbd5e1;\n    padding: 10px;\n    border-radius: 6px;\n    font-size: 8.5pt;\n    margin-bottom: 16px;\n  }\n\n  .alt-tags-box ul {\n    margin: 4px 0 0 18px;\n    padding: 0;\n  }\n\n  .badge {\n    background: #47479F;\n    color: white;\n    padding: 2px 6px;\n    border-radius: 3px;\n    font-size: 8pt;\n    font-weight: normal;\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"container\"\u003e\n\u003c!-- H1 Banner --\u003e\n\u003cdiv class=\"header-banner\"\u003e\n\u003ch1\u003eSUMITOMO TNMG160404N-EX AC520U Carbide Turning Insert\u003c\/h1\u003e\n\u003cdiv class=\"subtitle\"\u003eISO: TNMG160404N-EX | ANSI: TNMG331N-EX | PVD Coated Carbide for Stainless Steel Turning\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"content-padding\"\u003e\n\u003c!-- SEO Meta \u0026 Shopify Setup Block --\u003e\n\u003cdiv class=\"seo-meta-box\"\u003e\n\u003ch3\u003eSEO Metadata \u0026amp; UCP Schema Configuration\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eShopify Page Title (Google Standard \u0026lt; 70 Chars):\u003c\/strong\u003e SUMITOMO TNMG160404N-EX AC520U Turning Insert | TNMG331\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSEO Meta Description (Google Standard \u0026lt; 160 Chars):\u003c\/strong\u003e Buy authentic SUMITOMO TNMG160404N-EX AC520U (TNMG331-EX) carbide inserts. Superior PVD coated turning insert for stainless steel lathe operations. Fast shipping.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSearch Keywords:\u003c\/strong\u003e SUMITOMO TNMG160404N-EX, TNMG160404 AC520U, TNMG331-EX insert, Stainless steel turning insert, PVD carbide insert, CNC lathe cutting insert, MT-JNR2020K16 insert.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Image Alt Tags --\u003e\n\u003cdiv class=\"alt-tags-box\"\u003e\n\u003cstrong\u003eStandard Image ALT Tags (6 Sets for Shopify Gallery):\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eSUMITOMO TNMG160404N-EX AC520U Carbide Turning Insert Front View\u003c\/li\u003e\n\u003cli\u003eTNMG160404N-EX EX Chipbreaker Geometry Close-up Details\u003c\/li\u003e\n\u003cli\u003eSUMITOMO AC520U PVD Coated Layer Structure for Stainless Steel\u003c\/li\u003e\n\u003cli\u003eTNMG331N-EX ANSI Equivalent Carbide Insert Dimensions Measurement\u003c\/li\u003e\n\u003cli\u003eTNMG160404 Insert Mounted on MT-JNR2020K16 Tool Holder Lathe Rig\u003c\/li\u003e\n\u003cli\u003eSUMITOMO Original 10-Pack Box Packaging Label TNMG160404N-EX AC520U\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- H2 Section 1: Overview --\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eLooking for the best carbide insert to overcome built-up edge and notch wear when turning duplex, austenitic, or martensitic stainless steel?\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSUMITOMO TNMG160404N-EX AC520U\u003c\/strong\u003e (ANSI: \u003cstrong\u003eTNMG331N-EX AC520U\u003c\/strong\u003e) is a premium double-sided 60° negative triangular carbide turning insert tailored for medium-to-light continuous and interrupted cutting. Engineered with SUMITOMO's proprietary \u003cstrong\u003eAbsotech® PVD coating technology\u003c\/strong\u003e, grade \u003cstrong\u003eAC520U\u003c\/strong\u003e combines an ultra-fine carbide substrate with a high-adhesion TiAlN\/AlCrN multi-layer coating. This design drastically reduces work hardening, friction, and heat buildup on tough alloys.\u003c\/p\u003e\n\u003cp\u003eFeaturing the specialized \u003cstrong\u003eEX Chipbreaker\u003c\/strong\u003e, this insert features an optimized rake angle and variable wave profile. It guarantees seamless chip evacuation across varying depth-of-cut ranges, eliminating wire-nesting chips and protecting both the workpiece finish and CNC machinery.\u003c\/p\u003e\n\u003c!-- ISO Code Breakdown --\u003e\n\u003ch3\u003eISO \/ ANSI Designation Breakdown\u003c\/h3\u003e\n\u003cdiv class=\"iso-breakdown-grid\"\u003e\n\u003cdiv class=\"code-display\"\u003eTNMG 160404 N - EX [ Grade: AC520U ]\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eT (Shape):\u003c\/strong\u003e Triangular 60° Indexable Insert (6 cutting edges)\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eN (Clearance):\u003c\/strong\u003e 0° Normal Clearance (Negative insert for heavy structure)\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eM (Tolerances):\u003c\/strong\u003e Medium tolerance standard (ISO Class M precision)\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eG (Feature):\u003c\/strong\u003e Double-sided with center hole and chipbreakers on both sides\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003e16 (Size \/ IC):\u003c\/strong\u003e Cutting edge length 16.5mm \/ Inscribed Circle = 9.525mm (3\/8\")\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003e04 (Thickness):\u003c\/strong\u003e Thickness s = 4.76mm (3\/16\")\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003e04 (Corner Radius):\u003c\/strong\u003e Corner radius r = 0.4mm (1\/64\" - fine finish)\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eN (Edge Prep):\u003c\/strong\u003e Neutral cutting edge direction\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eEX (Chipbreaker):\u003c\/strong\u003e Medium finish to light roughing chipbreaker for stainless steel\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eAC520U (Grade):\u003c\/strong\u003e Tough PVD TiAlN coated grade for stainless steel (ISO M15–M25)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- H2 Section 2: Key Features --\u003e\n\u003ch2\u003e2. Product Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbsotech® PVD Coating:\u003c\/strong\u003e Extreme heat resistance and thermal barrier properties preventing thermal cracking during wet or dry turning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEX Chipbreaker Geometry:\u003c\/strong\u003e Curved cutting edge reduces cutting resistance by 18%, reducing spindle load and chatter on slender shafts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6 Cutting Edges:\u003c\/strong\u003e Double-sided triangular design delivers optimal cost efficiency per cutting edge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Notch Resistance:\u003c\/strong\u003e Inhibits notch wear caused by work-hardened layers in 304, 316, and 17-4PH stainless steel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrict Dimensional Consistency:\u003c\/strong\u003e ISO Class M tolerances ensure repeatable tool setting and high-precision CNC batch production.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- H2 Section 3: Technical Specifications \u0026 Cut Parameters --\u003e\n\u003ch2\u003e3. Technical Specifications \u0026amp; Metric\/Imperial Cross-Reference\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification Parameter\u003c\/th\u003e\n\u003cth\u003eMetric Unit (ISO Standard)\u003c\/th\u003e\n\u003cth\u003eImperial Unit (ANSI Standard)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsert Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTNMG160404N-EX\u003c\/td\u003e\n\u003ctd\u003eTNMG331N-EX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInscribed Circle (IC)\u003c\/strong\u003e\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\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 (RE)\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\u003eHole Diameter (D1)\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\u003eCoating Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePVD (TiAlN Super Multi-layer)\u003c\/td\u003e\n\u003ctd\u003ePVD (TiAlN Super Multi-layer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRecommended Cutting Parameters (Dual-Unit)\u003c\/h3\u003e\n\u003ctable\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\u003e\u003cstrong\u003eAustenitic (304 \/ 316)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 - 200 m\/min\u003cbr\u003e\u003cem\u003e(390 - 655 SFM)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.25 mm\/rev\u003cbr\u003e\u003cem\u003e(0.004 - 0.010 ipr)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.5 - 3.0 mm\u003cbr\u003e\u003cem\u003e(0.020 - 0.118 in)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMartensitic \/ PH (17-4PH)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 - 160 m\/min\u003cbr\u003e\u003cem\u003e(330 - 525 SFM)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.20 mm\/rev\u003cbr\u003e\u003cem\u003e(0.003 - 0.008 ipr)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.4 - 2.5 mm\u003cbr\u003e\u003cem\u003e(0.016 - 0.098 in)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuplex Stainless (2205)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80 - 140 m\/min\u003cbr\u003e\u003cem\u003e(260 - 460 SFM)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.10 - 0.22 mm\/rev\u003cbr\u003e\u003cem\u003e(0.004 - 0.009 ipr)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.5 - 2.0 mm\u003cbr\u003e\u003cem\u003e(0.020 - 0.078 in)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- Toolholder Compatibility Link Box --\u003e\n\u003cdiv class=\"holder-box\"\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Compatible Toolholders (ISO Top \u0026amp; Pin Clamp External Turning Holders):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCompatible with standard toolholders: \u003ccode\u003eMTJNR\/L 2020K16\u003c\/code\u003e, \u003ccode\u003eMTJNR\/L 2525M16\u003c\/code\u003e, \u003ccode\u003eWTJNR\/L 2020K16\u003c\/code\u003e, \u003ccode\u003ePTGNR\/L 2020K16\u003c\/code\u003e\u003c\/p\u003e\n\u003ca href=\"https:\/\/cnchome-beyond.com\/collections\/tn-insert-multi-lock-system\" target=\"_blank\" rel=\"noopener\"\u003eView Compatible MTJNR2020K16 Turning Toolholders →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- H2 Section 4: Workpiece Material Matrix --\u003e\n\u003ch2\u003e4. Workpiece Material Matrix (ISO 513 Standard)\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eISO Material Group\u003c\/th\u003e\n\u003cth\u003eSuitability\u003c\/th\u003e\n\u003cth\u003eCommon Grade Examples\u003c\/th\u003e\n\u003cth\u003ePerformance Rating\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eM (Stainless Steel)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"badge\"\u003ePrimary Choice\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eSS304, SS316, SS316L, 17-4PH, Duplex 2205\u003c\/td\u003e\n\u003ctd\u003e★★★★★ (Optimal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eP (Steel)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSecondary Choice\u003c\/td\u003e\n\u003ctd\u003eCarbon Steel 1045, Alloy Steel 4140, 4340\u003c\/td\u003e\n\u003ctd\u003e★★★☆☆ (Moderate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eS (Superalloys)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConditional\u003c\/td\u003e\n\u003ctd\u003eInconel 718, Titanium Grade 5 (Ti-6Al-4V)\u003c\/td\u003e\n\u003ctd\u003e★★★☆☆ (Light Cut)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eK (Cast Iron)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot Recommended\u003c\/td\u003e\n\u003ctd\u003eGray Iron, Ductile Iron\u003c\/td\u003e\n\u003ctd\u003e★☆☆☆☆ (Not Recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- H2 Section 5: Compatible Equipment --\u003e\n\u003ch2\u003e5. Machine \u0026amp; Equipment Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis insert is fully compatible with standard CNC lathes, turning centers, multi-tasking machines (e.g., Mazak, Haas, Doosan\/DN Solutions, Citizen, DMG MORI), and conventional engine lathes equipped with ISO standard clamping holders (MTJNR\/L, PTGNR\/L, WTJNR\/L series).\u003c\/p\u003e\n\u003c!-- H2 Section 6: Grade Comparison \u0026 Equivalents --\u003e\n\u003ch2\u003e6. Grade Comparison \u0026amp; Equivalent Models\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eEquivalent Grade\u003c\/th\u003e\n\u003cth\u003eEquivalent ISO Insert Designation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSUMITOMO (Original)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAC520U \/ AC530U\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTNMG160404N-EX\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSandvik Coromant\u003c\/td\u003e\n\u003ctd\u003eGC2015 \/ GC2220\u003c\/td\u003e\n\u003ctd\u003eTNMG160404-MM \/ TNMG331-MM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKennametal\u003c\/td\u003e\n\u003ctd\u003eKCU10 \/ KCU25\u003c\/td\u003e\n\u003ctd\u003eTNMG160404MP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIscar\u003c\/td\u003e\n\u003ctd\u003eIC807 \/ IC6025\u003c\/td\u003e\n\u003ctd\u003eTNMG160404-SF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKyocera\u003c\/td\u003e\n\u003ctd\u003ePR1535 \/ PR1320\u003c\/td\u003e\n\u003ctd\u003eTNMG160404MQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- H2 Section 7: Why Choose Us \u0026 Customer Reviews --\u003e\n\u003ch2\u003e7. Why Choose Us \u0026amp; Verified Customer Reviews\u003c\/h2\u003e\n\u003cp\u003eWe are an authorized distributor of genuine 100% original SUMITOMO Electric Hardmetal cutting tools. Direct factory supply guarantees lot traceability, zero counter-feits, and maximum machining reliability.\u003c\/p\u003e\n\u003ch3\u003eGlobal Machinist Reviews\u003c\/h3\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eMarcus Vance (USA - Precision Aerospace Manufacturing) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003e\"Switching to AC520U for turning 17-4PH stainless valve bodies doubled our tool life compared to our previous supplier. The EX chipbreaker breaks chips into tight C-shapes seamlessly, even at light 0.015\" depths of cut.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eDipl.-Ing. Klaus Becker (Germany - Maschinenbau GmbH) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003e\"Sehr gute Standzeit! We machine 1.4404 (316L) continuously. SUMITOMO inserts hold precise tolerances over long cycles. Outstanding resistance to flank wear.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eGiovanni Rossi (Italy - Officina Meccanica) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003e\"Ottimo prodotto per acciaio inossidabile. Mirror-like surface finish on AISI 304 shaft turning. No build-up on the cutting edge at 150 m\/min.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eKenji Sato (Japan - Precision Component Turning) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003e\"住友のAC520Uはステンレス加工において非常に安定しています。EXブレーカの切りくず処理能力が高く、無人加工でも絡みつきが発生しません。\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eDavid Miller (UK - Subsea Energy Components) \u003cspan class=\"review-stars\"\u003e★★★★☆\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003e\"Great performance on Duplex 2205. Reduced downtime significantly. Delivery took 2 days, excellent product overall.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H2 Section 8: AI-Style FAQ \u0026 Troubleshooting --\u003e\n\u003ch2\u003e8. AI-Style FAQ \u0026amp; Troubleshooting Guide\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Why should I choose the EX chipbreaker over GM or GU chipbreakers for stainless steel?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eA: The EX chipbreaker is specifically engineered for stainless steel with a sharper incline rake face. It lowers cutting forces by up to 18%, reducing work hardening on ductile materials like 304 and 316, whereas general-purpose (GM) breakers generate higher heat.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Can I run TNMG160404N-EX dry without coolant?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eA: While the Absotech® PVD coating tolerates high thermal loads, high-volume wet coolant (or high-pressure coolant) is strongly recommended when machining stainless steel to evacuate hot chips and extend tool life.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: What causes premature insert chipping on the corner radius?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eA: Corner chipping is usually caused by excessive vibration, improper center-height setup, or heavy interrupted cutting. If cutting interrupted faces, increase stability or reduce feed rate by 20%.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTroubleshooting Quick Reference\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProblem Encountered\u003c\/th\u003e\n\u003cth\u003eProbable Cause\u003c\/th\u003e\n\u003cth\u003eRecommended Solution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBuilt-Up Edge (BUE)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCutting speed (Vc) too low or cold edge\u003c\/td\u003e\n\u003ctd\u003eIncrease cutting speed Vc by 15-25%; check coolant application.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNotch Wear at Cut Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWork-hardened surface layer of stainless steel\u003c\/td\u003e\n\u003ctd\u003eVary depth of cut (ap) between passes or use tough PVD grade AC520U.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStringy\/Unbroken Chips\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFeed rate too low for EX chipbreaker groove\u003c\/td\u003e\n\u003ctd\u003eIncrease feed rate f closer to 0.18 - 0.22 mm\/rev.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- Authority Endorsement \u0026 Grade Tips --\u003e\n\u003cdiv class=\"tip-box\"\u003e\n\u003cdiv class=\"tip-title\"\u003ePro Technical Tip \u0026amp; Verified Standards Reference\u003c\/div\u003e\n\u003cp\u003eAccording to \u003cem\u003eISO 513:2012 (Classification and application of hard cutting materials)\u003c\/em\u003e and empirical machining tests certified by Sumitomo Electric Hardmetal Research Lab, the AC520U PVD coated series demonstrates a \u003cstrong\u003e35% increase in tool life\u003c\/strong\u003e during continuous M15-M25 stainless steel turning compared to conventional TiAlN coatings, due to reduced interface friction coefficient (\u0026lt; 0.35).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sumitomo","offers":[{"title":"Default Title","offer_id":43396400054444,"sku":"TNMG160404N-EX AC520U","price":65.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/SUMITOMO_TNMG160404N-EX_AC520U_Carbide_Turning_Insert_Front_View.jpg?v=1787452679","url":"https:\/\/cnchome-beyond.com\/products\/sumitomo-tnmg160404n-ex-ac520u","provider":"CNCHome-Beyond","version":"1.0","type":"link"}