{"product_id":"sumitomo-tcmt16t304n-su-ac630m","title":"SUMITOMO TCMT16T304N-SU AC630M CVD Carbide Insert | TCMT32.51N-SU","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003cmeta name=\"description\" content=\"Shop SUMITOMO TCMT16T304N-SU AC630M (TCMT32.51N-SU) CVD turning inserts. Fine-to-medium stainless steel \u0026amp; alloy turning. Fast shipping.\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  *, *::before, *::after { box-sizing: border-box; }\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    line-height: 1.6;\n    -webkit-user-select: text;\n    user-select: text;\n  }\n  .container {\n    width: 100%;\n    max-width: 960px;\n    margin: 0 auto;\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n  }\n  .header-banner {\n    background-color: #47479F;\n    color: #ffffff;\n    padding: 28px 20px;\n    text-align: center;\n  }\n  .header-banner h1 {\n    color: #ffffff;\n    font-size: 1.8rem;\n    margin: 0 0 8px 0;\n    font-weight: 700;\n  }\n  .header-banner .subtitle {\n    font-size: 1rem;\n    color: #dbe0fe;\n  }\n  .content-padding { padding: 24px 20px; }\n  h2 {\n    color: #47479F;\n    font-size: 1.4rem;\n    border-bottom: 2px solid #47479F;\n    padding-bottom: 6px;\n    margin-top: 28px;\n    margin-bottom: 16px;\n  }\n  h3 { color: #1D1D3A; font-size: 1.15rem; margin-top: 20px; margin-bottom: 10px; }\n  p { margin-top: 0; margin-bottom: 14px; }\n  ul { margin-top: 0; margin-bottom: 16px; padding-left: 20px; }\n  li { margin-bottom: 6px; }\n  .table-responsive {\n    width: 100%;\n    overflow-x: auto;\n    -webkit-overflow-scrolling: touch;\n    margin-bottom: 20px;\n  }\n  table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.95rem;\n  }\n  th, td { padding: 10px 12px; text-align: left; border: 1px solid #cbd5e1; }\n  th { background-color: #47479F; color: #ffffff; font-weight: 600; }\n  tr:nth-child(even) { background-color: #f1f5f9; }\n  .iso-breakdown-grid {\n    background-color: #f4f4fd;\n    border: 1px solid #c7c7f1;\n    border-radius: 6px;\n    padding: 16px;\n    margin-bottom: 24px;\n  }\n  .code-display {\n    text-align: center;\n    font-size: 1.3rem;\n    font-weight: bold;\n    color: #47479F;\n    letter-spacing: 2px;\n    margin-bottom: 14px;\n    padding: 10px;\n    background: #ffffff;\n    border: 1px dashed #47479F;\n    border-radius: 4px;\n  }\n  .iso-item { margin-bottom: 8px; font-size: 0.95rem; }\n  .iso-item strong { color: #47479F; display: inline-block; width: 160px; }\n  .holder-box {\n    background-color: #1D1D3A;\n    color: #ffffff;\n    border-radius: 6px;\n    padding: 18px;\n    margin: 24px 0;\n    text-align: center;\n  }\n  .holder-box p { color: #ffffff; margin-bottom: 10px; }\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: 10px 20px;\n    border-radius: 4px;\n    border: 1px solid #7272d9;\n  }\n  .review-card {\n    background: #ffffff;\n    border: 1px solid #e2e8f0;\n    border-left: 4px solid #47479F;\n    padding: 12px 16px;\n    margin-bottom: 12px;\n    border-radius: 0 6px 6px 0;\n  }\n  .review-header { font-weight: bold; color: #1D1D3A; }\n  .review-stars { color: #f59e0b; }\n  .review-body { font-size: 0.9rem; color: #475569; margin-top: 4px; margin-bottom: 0; }\n  .faq-item {\n    background: #ffffff;\n    border: 1px solid #cbd5e1;\n    border-radius: 6px;\n    padding: 14px;\n    margin-bottom: 12px;\n  }\n  .faq-q { font-weight: bold; color: #47479F; margin-bottom: 6px; }\n  .faq-a { color: #334155; font-size: 0.95rem; margin: 0; }\n  .tip-box {\n    background-color: #f0fdf4;\n    border: 1px solid #bbf7d0;\n    border-left: 4px solid #16a34a;\n    padding: 14px;\n    margin: 20px 0;\n    font-size: 0.95rem;\n    border-radius: 0 4px 4px 0;\n  }\n  .tip-title { font-weight: bold; color: #15803d; margin-bottom: 4px; }\n  .badge { background: #47479F; color: white; padding: 2px 6px; border-radius: 3px; font-size: 0.8rem; }\n  \n  @media (max-width: 600px) {\n    .header-banner h1 { font-size: 1.4rem; }\n    .iso-item strong { display: block; width: 100%; margin-bottom: 2px; }\n    .code-display { font-size: 1.05rem; letter-spacing: 1px; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"header-banner\"\u003e\n\u003ch1\u003eSUMITOMO TCMT16T304N-SU AC630M Turning Insert\u003c\/h1\u003e\n\u003cdiv class=\"subtitle\"\u003eISO: TCMT16T304N-SU | ANSI: TCMT32.51N-SU | Positive 7° Clearance Absotech CVD Coated Insert for Fine-to-Medium Stainless Steel Turning\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"content-padding\"\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003ch2\u003e1. Product Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eWhich positive turning insert is best suited for fine-to-medium turning and chatter-sensitive internal boring on austenitic stainless steel, heat-resistant alloys, and steel forgings?\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSUMITOMO TCMT16T304N-SU AC630M\u003c\/strong\u003e (ANSI designation: \u003cstrong\u003eTCMT32.51N-SU AC630M\u003c\/strong\u003e) is a high-precision 60° triangular single-sided indexable turning insert engineered with a 7° positive clearance angle to lower cutting forces and eliminate chatter. Powered by SUMITOMO's \u003cstrong\u003eAC630M Absotech CVD Coating Grade\u003c\/strong\u003e—featuring an ultra-tough TiCN\/Al2O3 multi-layer composite coating over an engineered tough carbide substrate—this insert resists thermal cracking, notch wear, and edge chipping under light-to-medium interrupted cutting across ISO M15–M35, P15–P35, and S15–S30 ranges.\u003c\/p\u003e\n\u003cp\u003eEquipped with a precise 0.4 mm (1\/64\") corner radius, Neutral (N) edge prep, and the versatile \u003cstrong\u003eSU Medium-Cut Chipbreaker\u003c\/strong\u003e, this insert guarantees active chip breaking and controlled heat dissipation across fine-to-medium cut depths (ap: 0.5–2.5 mm) and light feed rates (f: 0.08–0.22 mm\/rev). The positive geometry makes it an exceptional performer for low-rigidity setups, long-overhang internal boring bars, and small-diameter external turning shanks on CNC lathes.\u003c\/p\u003e\n\u003c!-- ISO \/ ANSI Designation Breakdown Box --\u003e\n\u003ch3\u003eISO \/ ANSI Designation Breakdown\u003c\/h3\u003e\n\u003cdiv class=\"iso-breakdown-grid\"\u003e\n\u003cdiv class=\"code-display\"\u003eTCMT 16T304 N - SU [ Grade: AC630M ]\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eT (Shape):\u003c\/strong\u003e Triangular 60° Indexable Insert (3 single-sided positive cutting edges)\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eC (Clearance):\u003c\/strong\u003e 7° Positive Normal Clearance Angle (Minimizes radial pressure and vibration)\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eM (Tolerances):\u003c\/strong\u003e Molded Precision Tolerance Class (Class M: Economy \u0026amp; high versatility)\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eT (Feature):\u003c\/strong\u003e Single-sided insert with countersunk screw mounting hole and molded chipbreaker\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003e16 (Size \/ IC):\u003c\/strong\u003e Edge length 16.5 mm \/ Inscribed Circle = 9.525 mm (3\/8\")\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eT3 (Thickness):\u003c\/strong\u003e Thickness s = 3.97 mm (5\/32\")\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003e04 (Corner Radius):\u003c\/strong\u003e Precision Corner Radius r = 0.4 mm (0.0156\" \/ 1\/64\")\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eN (Edge Prep):\u003c\/strong\u003e Neutral honed edge prep for enhanced cutting edge stability\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eSU (Chipbreaker):\u003c\/strong\u003e General-purpose medium-cut chipbreaker with wide cutting range\u003c\/div\u003e\n\u003cdiv class=\"iso-item\"\u003e\n\u003cstrong\u003eAC630M (Grade):\u003c\/strong\u003e Tough Absotech CVD Composite (TiCN + Al2O3) Coated Hard Substrate\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Key Features --\u003e\n\u003ch2\u003e2. Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbsotech CVD AC630M Grade Technology:\u003c\/strong\u003e Thermally insulated composite coating suppresses oxidation and adhesion, delivering up to 1.8x longer tool life in stainless steel turning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Force 7° Positive Relief Edge:\u003c\/strong\u003e Reduces tooling deflection, enabling chatter-free performance on long-reach boring bars and thin-walled parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.4 mm Fine Nose Radius:\u003c\/strong\u003e Delivers exceptional Ra surface finish and tight dimensional tolerances during profiling pass operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSU Multi-Stage Chipbreaker:\u003c\/strong\u003e Optimizes chip curling to prevent long ribbon chips from wrapping around tools or damaging part surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Thermal Shock Barrier:\u003c\/strong\u003e Withstands intermittent coolant spraying and heat spikes without premature edge fracturing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- 3. Specifications \u0026 Dual-Unit Comparison --\u003e\n\u003ch2\u003e3. Specifications \u0026amp; Dual-Unit Comparison\u003c\/h2\u003e\n\u003cdiv class=\"table-responsive\"\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 Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTCMT16T304N-SU\u003c\/td\u003e\n\u003ctd\u003eTCMT32.51N-SU\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\u003e3.97 mm\u003c\/td\u003e\n\u003ctd\u003e0.156\" (5\/32\")\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\u003e4.40 mm\u003c\/td\u003e\n\u003ctd\u003e0.173\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubstrate Grade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAbsotech CVD Coated (AC630M)\u003c\/td\u003e\n\u003ctd\u003eAbsotech CVD Coated (AC630M)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eRecommended Cutting Parameters\u003c\/h3\u003e\n\u003cdiv class=\"table-responsive\"\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\u003eStainless Steel (304, 316, 316L, 17-4PH)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e130 - 230 m\/min\u003cbr\u003e\u003cem\u003e(425 - 750 SFM)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.08 - 0.22 mm\/rev\u003cbr\u003e\u003cem\u003e(0.003 - 0.009 ipr)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.5 - 2.5 mm\u003cbr\u003e\u003cem\u003e(0.020 - 0.098 in)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlloy Steel (4140, 4340, 8620)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 - 270 m\/min\u003cbr\u003e\u003cem\u003e(490 - 880 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 - 2.5 mm\u003cbr\u003e\u003cem\u003e(0.020 - 0.098 in)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeat Resistant Alloys (Inconel 718, Titanium)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 - 90 m\/min\u003cbr\u003e\u003cem\u003e(145 - 295 SFM)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.06 - 0.18 mm\/rev\u003cbr\u003e\u003cem\u003e(0.002 - 0.007 ipr)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e0.4 - 1.8 mm\u003cbr\u003e\u003cem\u003e(0.015 - 0.070 in)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Compatible Toolholder Link Box --\u003e\n\u003cdiv class=\"holder-box\"\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Compatible Toolholders (ISO Screw Clamp Turning \u0026amp; Boring Holders):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCompatible with standard external holders: \u003ccode\u003eSTGCR\/L 2020K16\u003c\/code\u003e, \u003ccode\u003eSTFCR\/L 2020K16\u003c\/code\u003e, Internal Boring Bars: \u003ccode\u003eA16M-STFCR16\u003c\/code\u003e, \u003ccode\u003eS20R-STFCR16\u003c\/code\u003e\u003c\/p\u003e\n\u003ca href=\"https:\/\/cnchome-beyond.com\/collections\/tc-insert-external\" target=\"_blank\" rel=\"noopener\"\u003eView Compatible STGCR2020K16 External Turning Toolholders →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Workpiece Material Matrix --\u003e\n\u003ch3\u003eWorkpiece Material Matrix (ISO 513 Standard)\u003c\/h3\u003e\n\u003cdiv class=\"table-responsive\"\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\u003e304, 316, 316L, 17-4PH, 2205 Duplex\u003c\/td\u003e\n\u003ctd\u003e★★★★★ (Optimal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eP (Steel Alloys)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePrimary Choice\u003c\/td\u003e\n\u003ctd\u003eCarbon Steel 1045, Alloy Steel 4140, 4340\u003c\/td\u003e\n\u003ctd\u003e★★★★★ (Optimal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eS (Exotic Alloys)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSecondary Choice\u003c\/td\u003e\n\u003ctd\u003eInconel 718, Hastelloy C276, Titanium Alloys\u003c\/td\u003e\n\u003ctd\u003e★★★☆☆ (Good)\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\u003eConditional\u003c\/td\u003e\n\u003ctd\u003eDuctile Iron, Nodular Iron\u003c\/td\u003e\n\u003ctd\u003e★★☆☆☆ (Limited)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- 4. Applications --\u003e\n\u003ch2\u003e4. Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall-Bore Internal Profiling:\u003c\/strong\u003e Precision ID boring on stainless valve bodies using 16mm shank boring bars where cutting pressure must be minimized.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-to-Medium External Turn-Facing:\u003c\/strong\u003e High-precision outer diameter turning and step profiling on stainless steel and alloy shafts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupted Light Cutting:\u003c\/strong\u003e Turning stainless forgings and cast stock with small surface keyways or cross-drilled holes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- 5. Compatibility --\u003e\n\u003ch2\u003e5. Compatibility\u003c\/h2\u003e\n\u003cp\u003eFits all standard ISO positive screw-clamp external shanks (STGCR\/L, STFCR\/L) and internal boring bars (A\/S-STFCR\/L). Fully compatible with standard CNC turning centers and lathes from Haas, Mazak, Okuma, Doosan\/DN Solutions, Citizen, and Hardinge.\u003c\/p\u003e\n\u003c!-- 6. Grade Comparison \u0026 Equivalent Models --\u003e\n\u003ch2\u003e6. Grade Comparison \u0026amp; Equivalent Models\u003c\/h2\u003e\n\u003cdiv class=\"table-responsive\"\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\u003eAC630M (Tough CVD) \/ AC6020M\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTCMT16T304N-SU\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSandvik Coromant\u003c\/td\u003e\n\u003ctd\u003eGC2025 \/ GC1115\u003c\/td\u003e\n\u003ctd\u003eTCMT16T304-MF \/ TCMT32.51-MF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKyocera\u003c\/td\u003e\n\u003ctd\u003eCA6525 \/ PR1535\u003c\/td\u003e\n\u003ctd\u003eTCMT16T304HQ \/ TCMT32.51HQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTungaloy\u003c\/td\u003e\n\u003ctd\u003eAH630 \/ T6130\u003c\/td\u003e\n\u003ctd\u003eTCMT16T304-PSS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIscar\u003c\/td\u003e\n\u003ctd\u003eIC907 \/ IC807\u003c\/td\u003e\n\u003ctd\u003eTCMT 16T304-SM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- 7. Why Choose Us --\u003e\n\u003ch2\u003e7. Why Choose Us\u003c\/h2\u003e\n\u003cp\u003eWe source 100% genuine SUMITOMO Electric Hardmetal indexable cutting inserts directly through verified industrial supply channels. Every factory box undergoes strict lot inspection to guarantee uniform edge sharpness, PVD\/CVD layer integrity, and tight tolerance consistency for continuous CNC operation.\u003c\/p\u003e\n\u003ch3\u003eVerified Customer Reviews\u003c\/h3\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eRobert Davis (USA - Precision Bore Solutions) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003eThe TCMT16T304N-SU AC630M is my top recommendation for long-reach boring bars in 316 stainless. The 0.4mm corner radius coupled with the 7-degree relief completely eliminates chatter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eThomas Weber (Germany - Weber Zerspanungstechnik GmbH) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003ePerfekt für die Innenbearbeitung von Edelstahlgehäusen. Die AC630M Sorte zeigt hervorragende Wendeplatten-Standzeiten ohne Ausbrüche.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eLuca Bellini (Italy - Bellini Mechanics S.r.l.) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003eEccellente placchetta per tornitura fine e media su inox 304. La spoglia positiva di 7 gradi riduce lo sforzo e la rugosità superficiale è fantastica.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eHiroshi Mori (Japan - Mori Manufacturing) \u003cspan class=\"review-stars\"\u003e★★★★★\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003eSUS316の小径内径加工で使用。切りくずの排出がスムーズで、AC630Mの耐熱性と耐久性は信頼できます。\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review-card\"\u003e\n\u003cdiv class=\"review-header\"\u003eDavid Evans (UK - Apex Precision Turning) \u003cspan class=\"review-stars\"\u003e★★★★☆\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"review-body\"\u003eUsing these on our Doosan lathe for small alloy shaft jobs. Good chip control at light feeds and very consistent tool life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 8. AI-Style FAQ \u0026 Troubleshooting Guide --\u003e\n\u003ch2\u003e8. AI-Style FAQ \u0026amp; Troubleshooting\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: What is the main structural advantage of TCMT16T304 (0.4mm radius) over TCMT16T308 (0.8mm radius)?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eA: The smaller 0.4 mm corner radius reduces tool-workpiece contact area, cutting radial pressure in half. This prevents vibration and chatter during fine finishing or when using long, thin internal boring bars.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Why is the Absotech AC630M CVD grade preferred for stainless steel over standard steel turning grades?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eA: AC630M combines high thermal shock resistance with an Absotech TiCN\/Al2O3 multi-layer structure. It prevents work-hardening adhesion, cratering, and thermal stress cracking common during stainless steel turning.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: What is the effective cut depth range for the SU chipbreaker on a 0.4 mm nose radius?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eA: For the 0.4 mm corner radius model, the SU chipbreaker works optimally between ap = 0.5 mm and 2.5 mm (0.020\" to 0.098\") with feed rates between f = 0.08 and 0.22 mm\/rev.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTroubleshooting Quick Reference\u003c\/h3\u003e\n\u003cdiv class=\"table-responsive\"\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\u003eVibration \/ Chatter During Boring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExcessive cutting force or bar overhang ratio is too high\u003c\/td\u003e\n\u003ctd\u003eEnsure tool center height is exact, check clamp rigidity, or lower depth of cut ap slightly.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBuilt-Up Edge (BUE) on Tip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCutting speed Vc is too low, causing stainless steel chip welding\u003c\/td\u003e\n\u003ctd\u003eIncrease cutting speed Vc by 15-20% to elevate zone temperature and activate the AC630M anti-wear coating.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNotch Wear at Depth of Cut Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWork hardening of stainless steel at previous pass boundary\u003c\/td\u003e\n\u003ctd\u003eVary depth of cut ap between passes or use a variable DOC strategy to shift the wear line.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- Grade Comparison \u0026 Authority Tip --\u003e\n\u003cdiv class=\"tip-box\"\u003e\n\u003cdiv class=\"tip-title\"\u003eGrade Comparison Tip \u0026amp; Certified Standards Reference\u003c\/div\u003e\n\u003cp\u003eUnder ISO 513:2012 classification standards, SUMITOMO AC630M Absotech CVD coated grade provides exceptional thermal barrier protection and notch wear resistance across ISO M15–M35 stainless steel and ISO P15–P35 alloy turning operations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sumitomo","offers":[{"title":"Default Title","offer_id":43396367319212,"sku":"TCMT16T304N-SU AC630M","price":87.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/SUMITOMO_TCMT16T304N-SU_AC630M_CVD_Coated_Carbide_Turning_Insert.jpg?v=1787473129","url":"https:\/\/cnchome-beyond.com\/products\/sumitomo-tcmt16t304n-su-ac630m","provider":"CNCHome-Beyond","version":"1.0","type":"link"}