{"product_id":"tungaloy-wnmg080408-th-t9125-carbide-insert","title":"Tungaloy WNMG080408-TH T9125 Carbide Turning Insert – PVD Coated for Steel Semi-Finishing","description":"\u003c!-- ============================================================\n     TUNGALOY WNMG080408-TH T9125 – PRODUCT DETAIL PAGE\n     Brand Color: #47479F | Mobile-First | No iframes | No fixed widths\n     ============================================================ --\u003e\n\u003cstyle\u003e\n  .tng-wrap{font-family:'Segoe UI',Arial,sans-serif;color:#1a1a2e;line-height:1.7;max-width:100%}\n  .tng-hero{background:#47479F;color:#fff;padding:32px 24px;border-radius:10px;margin-bottom:28px}\n  .tng-hero h1{font-size:clamp(1.25rem,3vw,1.85rem);font-weight:800;margin:0 0 10px;letter-spacing:.4px}\n  .tng-hero p{font-size:1rem;margin:0;opacity:.92}\n  .tng-badge{display:inline-block;background:#fff;color:#47479F;font-weight:700;font-size:.78rem;padding:3px 10px;border-radius:20px;margin-right:6px;margin-bottom:6px}\n  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#dde;border-radius:8px;overflow:hidden}\n  .tng-faq-q{background:#47479F;color:#fff;padding:14px 18px;font-weight:700;font-size:.95rem}\n  .tng-faq-a{background:#f9f9ff;padding:14px 18px;font-size:.9rem;color:#333}\n  .tng-tip-box{background:#1a1a2e;color:#fff;border-radius:10px;padding:20px 24px;margin-top:28px}\n  .tng-tip-box h3{color:#a0a0ff;margin-bottom:12px}\n  .tng-tip-box ul{margin:0;padding-left:20px}\n  .tng-tip-box li{margin-bottom:6px;font-size:.9rem;opacity:.92}\n  .tng-why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}\n  .tng-why-card{background:#47479F;color:#fff;border-radius:8px;padding:16px;text-align:center}\n  .tng-why-card .icon{font-size:1.8rem;margin-bottom:8px}\n  .tng-why-card strong{display:block;font-size:.95rem;margin-bottom:4px}\n  .tng-why-card span{font-size:.82rem;opacity:.88}\n  .tng-keyword-cloud{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}\n  .tng-kw{background:#e8e8f8;color:#47479F;font-size:.8rem;padding:4px 10px;border-radius:20px;font-weight:600}\n  @media(max-width:600px){\n    .tng-hero{padding:22px 16px}\n    .tng-code-cell{min-width:55px;padding:10px 8px}\n    .tng-code-cell .letter{font-size:1.2rem}\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"tng-wrap\"\u003e\n\u003c!-- HERO \/ H1 --\u003e\n\u003cdiv class=\"tng-hero\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"tng-badge\"\u003eISO WNMG\u003c\/span\u003e \u003cspan class=\"tng-badge\"\u003eT9125 Grade\u003c\/span\u003e \u003cspan class=\"tng-badge\"\u003ePVD TiAlN Coated\u003c\/span\u003e \u003cspan class=\"tng-badge\"\u003eTH Chipbreaker\u003c\/span\u003e \u003cspan class=\"tng-badge\"\u003eTungaloy\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch1\u003e\u003cspan style=\"color: rgb(255, 255, 255);\"\u003eTungaloy WNMG080408-TH T9125 Carbide Turning Insert – PVD Coated for Steel Semi-Finishing \u0026amp; Interrupted Cuts\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003eAn 80° trigon carbide insert engineered for semi-finishing of carbon steel and alloy steel, including interrupted cuts and variable stock conditions. The T9125 grade’s enhanced toughness and TH chipbreaker geometry deliver reliable performance where T9115 reaches its limits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- PRODUCT OVERVIEW --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\"Which carbide insert handles interrupted cuts and variable stock in steel semi-finishing without chipping?\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eTungaloy WNMG080408-TH T9125\u003c\/strong\u003e is a precision-ground, 80° trigon carbide turning insert designed for \u003cstrong\u003esemi-finishing operations on carbon steel, alloy steel, and cast steel\u003c\/strong\u003e, particularly in conditions involving interrupted cuts, forged surfaces, or variable stock allowances. The \u003cstrong\u003eT9125 grade\u003c\/strong\u003e features a \u003cstrong\u003ePVD TiAlN multi-layer coating\u003c\/strong\u003e over a tougher carbide substrate than T9115, providing superior resistance to micro-chipping and edge fracture under mechanical shock.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eTH chipbreaker geometry\u003c\/strong\u003e is Tungaloy’s \u003cstrong\u003emedium-feed, high-toughness chipbreaker\u003c\/strong\u003e — designed with a wider chip groove and reinforced cutting edge land compared to the TSF geometry. This makes it ideal for semi-finishing at moderate-to-high feed rates (fn 0.15–0.40 mm\/rev) where chip control and edge stability are equally important. The TH geometry handles the transition zone between finishing and roughing with confidence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Difference vs. WNMG080408-TSF T9115:\u003c\/strong\u003e T9125 + TH offers \u003cstrong\u003emore toughness and higher feed capability\u003c\/strong\u003e at the cost of slightly lower maximum cutting speed. Choose T9115\/TSF for smooth continuous finishing; choose T9125\/TH for semi-finishing with interruptions, scale, or forged surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSearch Keywords:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"tng-keyword-cloud\"\u003e\n\u003cspan class=\"tng-kw\"\u003eWNMG080408-TH T9125\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eTungaloy carbide insert\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eWNMG 08 04 08\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003ePVD coated turning insert\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eTH chipbreaker\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eT9125 grade\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003einterrupted cut insert\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003esteel semi-finishing insert\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003ealloy steel turning insert\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eCNC lathe insert\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eWNMG insert for steel\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eISO P25 carbide\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003eTiAlN coated insert\u003c\/span\u003e \u003cspan class=\"tng-kw\"\u003etough carbide grade\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- MODEL CODE DECODER --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eModel Code Decoder – WNMG080408-TH T9125\u003c\/h2\u003e\n\u003cp\u003eEvery character in the ISO insert designation carries precise engineering meaning:\u003c\/p\u003e\n\u003cdiv class=\"tng-code-box\"\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eW\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eInsert Shape\u003cbr\u003e80° Trigon (W)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eN\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eClearance Angle\u003cbr\u003e0° (Negative)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eM\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eTolerance Class\u003cbr\u003e±0.05–0.13mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eG\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eFixing Method\u003cbr\u003eHole + Chip Groove (Double-sided)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e08\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eCutting Edge Length\u003cbr\u003e8.0mm (IC 9.525mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e04\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eInsert Thickness\u003cbr\u003e4.76mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e08\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eCorner Radius\u003cbr\u003e0.8mm (R0.8)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eTH\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eChipbreaker\u003cbr\u003eTungaloy Heavy \/ Medium-Feed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eT\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eBrand Prefix\u003cbr\u003eTungaloy Grade\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e91\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eGrade Number\u003cbr\u003ePVD TiAlN Series\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e25\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eISO Application\u003cbr\u003eP25 – Steel Semi-Finishing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003eTH Chipbreaker Geometry Explained\u003c\/h3\u003e\n\u003cul style=\"font-size: .92rem; color: #333; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider chip groove width:\u003c\/strong\u003e Accommodates higher feed rates (fn 0.15–0.40 mm\/rev) and heavier chip loads compared to TSF geometry — ideal for semi-finishing and medium-feed operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforced cutting edge land (T-land):\u003c\/strong\u003e Micro-honed edge with wider hone provides superior resistance to chipping during interrupted cuts, forged surfaces, and variable stock conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModerate positive rake angle:\u003c\/strong\u003e Balances cutting force reduction with edge strength — lower cutting forces than negative geometries, more robust than TSF for demanding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for P20–P35 range:\u003c\/strong\u003e Designed to handle the toughest steel semi-finishing scenarios where finishing geometries (TSF) would chip prematurely.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- KEY FEATURES --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"tng-features\"\u003e\n\u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 Enhanced Toughness Substrate\u003c\/strong\u003e\u003cspan\u003eT9125 uses a tougher carbide substrate than T9115 — superior resistance to micro-chipping and edge fracture under mechanical shock and interrupted cuts.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 PVD TiAlN Multi-Layer Coating\u003c\/strong\u003e\u003cspan\u003eOxidation resistance up to 900°C with excellent adhesion to the tough substrate. Maintains coating integrity even under intermittent cutting loads.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 TH Medium-Feed Chipbreaker\u003c\/strong\u003e\u003cspan\u003eWide groove with reinforced edge land — handles fn 0.15–0.40 mm\/rev with reliable chip control in semi-finishing and light roughing conditions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 R0.8 Corner Radius\u003c\/strong\u003e\u003cspan\u003eStrong corner for semi-finishing — supports higher feed rates, better chip thinning, and improved edge strength vs. R0.4 for demanding workpiece conditions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 80° Trigon Insert Shape (W)\u003c\/strong\u003e\u003cspan\u003eVersatile geometry for external turning and facing. Stronger edge than 55° or 35° diamond inserts — ideal for semi-finishing where edge strength matters.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 Double-Sided Insert (4 Edges)\u003c\/strong\u003e\u003cspan\u003eG-type double-sided insert with 4 usable cutting edges — maximizes cost efficiency and reduces tooling cost per part by up to 4x.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- TECHNICAL SPECIFICATIONS --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ch3\u003eMetric \u0026amp; Imperial Dimensions\u003c\/h3\u003e\n\u003ctable class=\"tng-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eMetric\u003c\/th\u003e\n\u003cth\u003eImperial\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsert Shape\u003c\/td\u003e\n\u003ctd\u003e80° Trigon (W)\u003c\/td\u003e\n\u003ctd\u003e80° Trigon (W)\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\u003e3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCutting Edge Length (L)\u003c\/td\u003e\n\u003ctd\u003e8.0 mm\u003c\/td\u003e\n\u003ctd\u003e0.315 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsert Thickness (S)\u003c\/td\u003e\n\u003ctd\u003e4.76 mm\u003c\/td\u003e\n\u003ctd\u003e0.1875 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorner Radius (rε)\u003c\/td\u003e\n\u003ctd\u003e0.8 mm\u003c\/td\u003e\n\u003ctd\u003e1\/32 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClearance Angle\u003c\/td\u003e\n\u003ctd\u003e0° (Negative)\u003c\/td\u003e\n\u003ctd\u003e0° (Negative)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTolerance Class\u003c\/td\u003e\n\u003ctd\u003eM (±0.05–0.13 mm)\u003c\/td\u003e\n\u003ctd\u003eM (±0.002–0.005 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Diameter\u003c\/td\u003e\n\u003ctd\u003e3.81 mm\u003c\/td\u003e\n\u003ctd\u003e0.150 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eT9125\u003c\/td\u003e\n\u003ctd\u003eT9125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN Multi-Layer\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN Multi-Layer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eISO Application\u003c\/td\u003e\n\u003ctd\u003eP20–P35, M20–M30\u003c\/td\u003e\n\u003ctd\u003eP20–P35, M20–M30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChipbreaker\u003c\/td\u003e\n\u003ctd\u003eTH (Medium-Feed \/ Heavy)\u003c\/td\u003e\n\u003ctd\u003eTH (Medium-Feed \/ Heavy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable Cutting Edges\u003c\/td\u003e\n\u003ctd\u003e4 edges (double-sided)\u003c\/td\u003e\n\u003ctd\u003e4 edges (double-sided)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackaging\u003c\/td\u003e\n\u003ctd\u003e10 pcs \/ box\u003c\/td\u003e\n\u003ctd\u003e10 pcs \/ box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRecommended Cutting Parameters\u003c\/h3\u003e\n\u003ctable class=\"tng-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkpiece Material\u003c\/th\u003e\n\u003cth\u003eCutting Speed Vc (m\/min)\u003c\/th\u003e\n\u003cth\u003eCutting Speed Vc (SFM)\u003c\/th\u003e\n\u003cth\u003eFeed Rate fn (mm\/rev)\u003c\/th\u003e\n\u003cth\u003eFeed Rate fn (in\/rev)\u003c\/th\u003e\n\u003cth\u003eDepth of Cut ap (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Steel (P)\u003c\/td\u003e\n\u003ctd\u003e150–280\u003c\/td\u003e\n\u003ctd\u003e492–919\u003c\/td\u003e\n\u003ctd\u003e0.15–0.40\u003c\/td\u003e\n\u003ctd\u003e0.006–0.016\u003c\/td\u003e\n\u003ctd\u003e0.5–3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlloy Steel (P)\u003c\/td\u003e\n\u003ctd\u003e120–240\u003c\/td\u003e\n\u003ctd\u003e394–787\u003c\/td\u003e\n\u003ctd\u003e0.15–0.35\u003c\/td\u003e\n\u003ctd\u003e0.006–0.014\u003c\/td\u003e\n\u003ctd\u003e0.5–2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Steel (P\/K)\u003c\/td\u003e\n\u003ctd\u003e100–200\u003c\/td\u003e\n\u003ctd\u003e328–656\u003c\/td\u003e\n\u003ctd\u003e0.15–0.35\u003c\/td\u003e\n\u003ctd\u003e0.006–0.014\u003c\/td\u003e\n\u003ctd\u003e0.5–2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStainless Steel (M)\u003c\/td\u003e\n\u003ctd\u003e80–160\u003c\/td\u003e\n\u003ctd\u003e262–525\u003c\/td\u003e\n\u003ctd\u003e0.12–0.25\u003c\/td\u003e\n\u003ctd\u003e0.005–0.010\u003c\/td\u003e\n\u003ctd\u003e0.3–1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: .82rem; color: #666;\"\u003e* Parameters are starting recommendations. T9125 + TH is optimized for the mid-to-high feed range. Reduce speed by 10–20% for interrupted cuts or forged surfaces.\u003c\/p\u003e\n\u003ch3\u003eChipbreaker Comparison – TSF vs TH\u003c\/h3\u003e\n\u003ctable class=\"tng-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eTSF (Finishing)\u003c\/th\u003e\n\u003cth\u003eTH (Medium-Feed) ✓\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeed Range (fn)\u003c\/td\u003e\n\u003ctd\u003e0.05–0.20 mm\/rev\u003c\/td\u003e\n\u003ctd\u003e0.15–0.40 mm\/rev\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth of Cut (ap)\u003c\/td\u003e\n\u003ctd\u003e0.2–1.5 mm\u003c\/td\u003e\n\u003ctd\u003e0.5–3.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEdge Strength\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterrupted Cut Resistance\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eHigh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Finish Potential\u003c\/td\u003e\n\u003ctd\u003eRa ≤ 0.8 µm\u003c\/td\u003e\n\u003ctd\u003eRa 1.6–3.2 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest Application\u003c\/td\u003e\n\u003ctd\u003eFinishing, thin-wall parts\u003c\/td\u003e\n\u003ctd\u003eSemi-finishing, interrupted cuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Grade\u003c\/td\u003e\n\u003ctd\u003eT9115\u003c\/td\u003e\n\u003ctd\u003eT9125 ✓\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- COMPATIBLE TOOL HOLDERS --\u003e\n\u003cdiv class=\"tng-toolholder-box\"\u003e\n\u003ch3\u003e🔧 Compatible Tool Holders (WNMG080408)\u003c\/h3\u003e\n\u003cp style=\"font-size: .85rem; opacity: .85; margin-bottom: 14px;\"\u003eThe WNMG080408 insert requires MWLNR\/L or DWLNR\/L series tool holders with an 08 pocket designation:\u003c\/p\u003e\n\u003cdiv class=\"tng-toolholder-grid\"\u003e\n\u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eMWLNR\/L 1616H08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e16mm shank, 95° lead angle, external turning\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eMWLNR\/L 2020K08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e20mm shank, heavy-duty external turning\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eMWLNR\/L 2525M08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e25mm shank, high-rigidity external turning\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eMWLNR\/L 3232P08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e32mm shank, heavy-duty semi-finishing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eDWLNR\/L 2020K08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e20mm shank, 93° lead angle, facing \u0026amp; turning\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eA25R-MWLNR08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003eBoring bar, 25mm bore, internal turning\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: .8rem; opacity: .75; margin-top: 12px;\"\u003eContact us to confirm compatibility with your specific machine setup and turret type.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- APPLICATIONS --\u003e\n\u003cdiv style=\"margin-top: 28px;\" class=\"tng-section\"\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cdiv class=\"tng-app-grid\"\u003e\n\u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eInterrupted Cut Turning\u003c\/strong\u003eSemi-finishing of keyway shafts, splined shafts, and components with cross-holes where edge chipping is a common failure mode.\u003c\/div\u003e\n\u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eForged Steel Components\u003c\/strong\u003eTurning of forged crankshafts, connecting rods, and flanges with variable stock and hard skin — where TSF geometry would chip prematurely.\u003c\/div\u003e\n\u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eAlloy Steel Semi-Finishing\u003c\/strong\u003eProductive semi-finishing of 42CrMo4, 4140, 4340, and similar alloy steels at moderate-to-high feed rates.\u003c\/div\u003e\n\u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eCast Steel \u0026amp; Cast Iron\u003c\/strong\u003eSemi-finishing of cast steel housings, pump bodies, and valve bodies with variable hardness and surface inclusions.\u003c\/div\u003e\n\u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eHeavy Automotive Parts\u003c\/strong\u003eSemi-finishing of truck axles, heavy-duty gearbox shafts, and differential components in medium-carbon alloy steel.\u003c\/div\u003e\n\u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eGeneral Engineering\u003c\/strong\u003eVersatile semi-finishing of flanges, couplings, hubs, and general machined steel components where productivity is prioritized over ultra-fine finish.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- TUNGALOY GRADE COMPARISON --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eTungaloy Grade Comparison – Steel Turning\u003c\/h2\u003e\n\u003ctable class=\"tng-grade-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003cth\u003eCoating\u003c\/th\u003e\n\u003cth\u003eISO Range\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003cth\u003eToughness Level\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eT9105\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN\u003c\/td\u003e\n\u003ctd\u003eP05–P15\u003c\/td\u003e\n\u003ctd\u003eHigh-speed finishing, hardened steel\u003c\/td\u003e\n\u003ctd\u003e★☆☆☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eT9115\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN\u003c\/td\u003e\n\u003ctd\u003eP10–P25\u003c\/td\u003e\n\u003ctd\u003eFinishing to semi-finishing, steel \u0026amp; SS\u003c\/td\u003e\n\u003ctd\u003e★★☆☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"highlight\"\u003e\n\u003ctd\u003eT9125 ✓\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN\u003c\/td\u003e\n\u003ctd\u003eP20–P35\u003c\/td\u003e\n\u003ctd\u003eSemi-finishing, interrupted cuts, forged\u003c\/td\u003e\n\u003ctd\u003e★★★☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAH725\u003c\/td\u003e\n\u003ctd\u003eCVD\u003c\/td\u003e\n\u003ctd\u003eP15–P30\u003c\/td\u003e\n\u003ctd\u003eSemi-finishing to roughing, steel\u003c\/td\u003e\n\u003ctd\u003e★★★★☆\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAH8015\u003c\/td\u003e\n\u003ctd\u003eCVD\u003c\/td\u003e\n\u003ctd\u003eP25–P40\u003c\/td\u003e\n\u003ctd\u003eRoughing, heavy interrupted cuts\u003c\/td\u003e\n\u003ctd\u003e★★★★★\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eT9115 (M)\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN\u003c\/td\u003e\n\u003ctd\u003eM10–M25\u003c\/td\u003e\n\u003ctd\u003eStainless steel finishing\u003c\/td\u003e\n\u003ctd\u003e★★☆☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: .82rem; color: #666;\"\u003e✓ = Current product. T9125 sits between T9115 (wear resistance) and AH725 (toughness) — the ideal semi-finishing grade for demanding steel conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- WHY CHOOSE US --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eWhy Choose Us\u003c\/h2\u003e\n\u003cdiv class=\"tng-why-grid\"\u003e\n\u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e🏭\u003c\/div\u003e\n\u003cstrong\u003eAuthorized Distributor\u003c\/strong\u003e\u003cspan\u003e100% genuine Tungaloy products with full manufacturer quality assurance.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e🚀\u003c\/div\u003e\n\u003cstrong\u003eFast Global Shipping\u003c\/strong\u003e\u003cspan\u003eWorldwide dispatch with full tracking and reliable delivery timelines.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e🔬\u003c\/div\u003e\n\u003cstrong\u003eTechnical Expertise\u003c\/strong\u003e\u003cspan\u003eApplication engineering support to help you select the right grade and geometry for your specific conditions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e📦\u003c\/div\u003e\n\u003cstrong\u003eBulk Pricing\u003c\/strong\u003e\u003cspan\u003eCompetitive volume discounts for production quantities. Contact us for a quote.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e✅\u003c\/div\u003e\n\u003cstrong\u003eGuaranteed Genuine\u003c\/strong\u003e\u003cspan\u003eEvery insert sourced directly from Tungaloy — zero counterfeits, zero compromises.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- CUSTOMER REVIEWS --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eCustomer Reviews\u003c\/h2\u003e\n\u003cdiv class=\"tng-review-grid\"\u003e\n\u003cdiv class=\"tng-review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv class=\"reviewer\"\u003eBrian T.\u003c\/div\u003e\n\u003cdiv class=\"country\"\u003e🇺🇸 United States\u003c\/div\u003e\n\u003cp\u003e\"Running WNMG080408-TH T9125 on forged 4140 steel flanges with interrupted cuts. Zero chipping issues — this grade handles the interruptions that were destroying our T9115 inserts. Tool life is consistent and predictable across the whole production run.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv class=\"reviewer\"\u003eKlaus B.\u003c\/div\u003e\n\u003cdiv class=\"country\"\u003e🇩🇪 Germany\u003c\/div\u003e\n\u003cp\u003e\"Perfekt für die Halbschlichtbearbeitung von 42CrMo4 mit Unterbrechungen. Die TH-Geometrie ist deutlich robuster als TSF bei ähnlicher Oberflächenqualität. Standzeit überzeugt auch bei Schmiedeteilen mit Zunder.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cdiv class=\"reviewer\"\u003eGiovanni R.\u003c\/div\u003e\n\u003cdiv class=\"country\"\u003e🇮🇹 Italy\u003c\/div\u003e\n\u003cp\u003e\"Utilizzo T9125 per la semi-finitura di alberi in acciaio bonificato con scanalature. La geometria TH gestisce bene le interruzioni senza scheggiature. Ra 1.6 raggiunto facilmente. Ottimo rapporto qualità-prezzo.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv class=\"reviewer\"\u003eTakashi N.\u003c\/div\u003e\n\u003cdiv class=\"country\"\u003e🇯🇵 Japan\u003c\/div\u003e\n\u003cp\u003e\"SCM440の断続切削に使用。T9115では欠损が発生していた箇所でもT9125は安定しています。TH槽型の切削抗力も許容範囲内で、大批量生産に自信を持って使えます。\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv class=\"reviewer\"\u003eAndrew P.\u003c\/div\u003e\n\u003cdiv class=\"country\"\u003e🇬🇧 United Kingdom\u003c\/div\u003e\n\u003cp\u003e\"We machine cast steel pump housings with hard spots and inclusions. T9125 + TH is the only insert combination that gives us consistent tool life without random edge failures. Highly recommended for cast steel applications.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv class=\"reviewer\"\u003eLi W.\u003c\/div\u003e\n\u003cdiv class=\"country\"\u003e🇨🇳 China\u003c\/div\u003e\n\u003cp\u003e\"用于42CrMo调质齿轮轴半精加工，断続切削条件下表现非常稳定。TH槽型切削力适中，刷刀次数比T9115多30%以上。性价比高，强烈推荐。\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-review-card\"\u003e\n\u003cdiv class=\"stars\"\u003e★★★★☆\u003c\/div\u003e\n\u003cdiv class=\"reviewer\"\u003eCarlos V.\u003c\/div\u003e\n\u003cdiv class=\"country\"\u003e🇲🇽 Mexico\u003c\/div\u003e\n\u003cp\u003e\"Excelente inserto para semi-acabado de acero forjado. La geometría TH aguanta bien las interrupciones y la piel de forja. Vida de herramienta muy consistente en producción de ejes de transmisión.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ --\u003e\n\u003cdiv class=\"tng-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"tng-faq\"\u003e\n\u003cdiv class=\"tng-faq-q\"\u003eQ1: When should I choose T9125 over T9115?\u003c\/div\u003e\n\u003cdiv class=\"tng-faq-a\"\u003eChoose \u003cstrong\u003eT9125\u003c\/strong\u003e when machining involves \u003cstrong\u003einterrupted cuts\u003c\/strong\u003e (keyways, cross-holes, splines), \u003cstrong\u003eforged surfaces with scale\u003c\/strong\u003e, \u003cstrong\u003evariable stock allowances\u003c\/strong\u003e, or when T9115 shows premature micro-chipping. T9115 is better for smooth, continuous finishing at higher speeds. T9125 sacrifices some maximum cutting speed for significantly improved toughness and edge stability under mechanical shock.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-faq\"\u003e\n\u003cdiv class=\"tng-faq-q\"\u003eQ2: What is the TH chipbreaker and how does it differ from TSF?\u003c\/div\u003e\n\u003cdiv class=\"tng-faq-a\"\u003eTH stands for \u003cstrong\u003eTungaloy Heavy \/ Medium-Feed\u003c\/strong\u003e chipbreaker. Compared to TSF (finishing), TH has a \u003cstrong\u003ewider chip groove\u003c\/strong\u003e and \u003cstrong\u003ereinforced cutting edge land\u003c\/strong\u003e that handles fn 0.15–0.40 mm\/rev with reliable chip control. TSF is optimized for fn 0.05–0.20 mm\/rev with maximum surface finish. Use TH when productivity (higher feeds) and edge toughness are more important than achieving the finest possible surface finish.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-faq\"\u003e\n\u003cdiv class=\"tng-faq-q\"\u003eQ3: Can T9125 be used for stainless steel turning?\u003c\/div\u003e\n\u003cdiv class=\"tng-faq-a\"\u003eT9125 covers \u003cstrong\u003eISO M20–M30\u003c\/strong\u003e (stainless steel) and can be used for semi-finishing of austenitic stainless steel (304, 316) at moderate cutting speeds. However, for stainless steel finishing where surface quality and BUE prevention are critical, T9115 with TSF geometry is generally preferred. Use T9125 for stainless steel only when interrupted cuts or tougher conditions require the extra edge strength.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-faq\"\u003e\n\u003cdiv class=\"tng-faq-q\"\u003eQ4: What tool holder do I need for WNMG080408?\u003c\/div\u003e\n\u003cdiv class=\"tng-faq-a\"\u003eYou need an \u003cstrong\u003eMWLNR\/L or DWLNR\/L series holder\u003c\/strong\u003e with an \u003cstrong\u003e08 pocket designation\u003c\/strong\u003e (e.g., MWLNR2525M08 for 25mm shank). For heavy semi-finishing, a 25mm or 32mm shank holder is recommended for maximum rigidity. For boring, use an A-series boring bar (e.g., A25R-MWLNR08). Always verify the pocket ends in ‘08’ to match this insert size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tng-faq\"\u003e\n\u003cdiv class=\"tng-faq-q\"\u003eQ5: How many cutting edges does the WNMG080408 have?\u003c\/div\u003e\n\u003cdiv class=\"tng-faq-a\"\u003eThe WNMG080408 is a \u003cstrong\u003edouble-sided insert with 4 usable cutting edges\u003c\/strong\u003e (G-type). Rotate or flip the insert when one edge is worn to use the next edge — reducing your effective tooling cost per part by up to 75% compared to single-sided inserts. With T9125’s enhanced toughness, each edge delivers consistent performance throughout its full tool life.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- GRADE TIP BOX --\u003e\n\u003cdiv class=\"tng-tip-box\"\u003e\n\u003ch3\u003e💡 Grade \u0026amp; Chipbreaker Selection Tips – Tungaloy Steel Turning Series\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eT9105 (PVD):\u003c\/strong\u003e Maximum wear resistance for high-speed finishing of hardened steel. Lowest toughness — avoid interrupted cuts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT9115 (PVD):\u003c\/strong\u003e Best balance for finishing to semi-finishing of steel and stainless. Use with TSF for smooth continuous cuts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT9125 (PVD) — This Product:\u003c\/strong\u003e Enhanced toughness for semi-finishing with interrupted cuts, forged surfaces, and variable stock. Use with TH chipbreaker.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAH725 (CVD):\u003c\/strong\u003e High-speed semi-finishing to roughing. Superior crater wear resistance for dry cutting — step up from T9125 for heavier conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAH8015 (CVD):\u003c\/strong\u003e Maximum toughness for heavy roughing and severe interrupted cuts. When nothing else survives, use AH8015.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker guide:\u003c\/strong\u003e TSF = finishing (fn 0.05–0.20) | TH = semi-finishing\/interrupted (fn 0.15–0.40) | TR = roughing (fn 0.30–0.60). Match chipbreaker to feed rate first, then select grade based on workpiece condition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupted cut rule:\u003c\/strong\u003e For every interruption per revolution, step up one toughness level: T9115 → T9125 → AH725 → AH8015.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Tungaloy","offers":[{"title":"Default Title","offer_id":43182232666284,"sku":"WNMG080408-TH T9125","price":76.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/Tungaloy_WNMG080408-TH_T9125_PVD_carbide_turning_insert_for_steel_semi-finishing_80_trigon_R0.8.jpg?v=1776522863","url":"https:\/\/cnchome-beyond.com\/products\/tungaloy-wnmg080408-th-t9125-carbide-insert","provider":"CNCHome-Beyond","version":"1.0","type":"link"}