{"product_id":"kennametal-4050399-cnmg4305ms-turning-insert-kcu25-carbide","title":"Kennametal 4050399 CNMG4305MS Turning Insert KCU25 Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4050399 is a CNMG-style indexable turning insert in grade KCU25, designed for general turning, facing, and boring operations on CNC and manual lathes. The insert features an 80-degree diamond shape with a negative rake geometry and a honed cutting edge for consistent edge stability. It is coated with AlTiN via a PVD process, providing heat and wear resistance when cutting steel, stainless steel, superalloys, and titanium. The 0.5-inch inscribed circle and 0.1875-inch thickness conform to ANSI and ISO CNMG standards. With four usable cutting edges per insert, this carbide grade delivers reliable tool life across a range of interrupted and continuous cuts.\u003c\/p\u003e\u003cp\u003eThis insert is suited for medium-duty turning applications in job shop and production environments. The KCU25 grade and MS chip breaker geometry are optimized for primary workpiece materials including carbon steel, stainless steel, superalloys, and titanium. Typical applications include OD turning, facing passes, and light boring where controlled chip formation and edge toughness are both required. It is held using a clamp and pin insert holding method, compatible with KENLOC-series toolholders.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e80-degree diamond insert shape (Shape Code: C) with negative rake for strong cutting edge geometry\u003c\/li\u003e\n\u003cli\u003eAlTiN PVD coating for heat resistance and extended tool life in steel and high-temperature alloys\u003c\/li\u003e\n\u003cli\u003eMS chip breaker design for controlled chip formation across turning, facing, and boring operations\u003c\/li\u003e\n\u003cli\u003eFour cutting edges per insert for cost-effective indexing\u003c\/li\u003e\n\u003cli\u003eHoned cutting edge style reduces microchipping on entry and exit\u003c\/li\u003e\n\u003cli\u003eConforms to ANSI and ISO standards; ISO code CNMG120402MS\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with KENLOC-series toolholders that accept CNMG-style inserts with a clamp and pin holding method. Suitable for multi-use application in turning, facing, and boring operations. Compatible primary workpiece materials are steel (P), stainless steel (M), superalloys, and titanium (S) per ISO material codes.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a machinist or tooling technician on a powered-off or e-stopped machine with all spindle motion confirmed stopped. Seat the insert fully into the pocket and engage the clamp and pin mechanism to the toolholder manufacturer torque specification before resuming cuts. Inspect the insert pocket for debris or wear before indexing to a fresh cutting edge. Dispose of worn inserts per applicable shop safety and sharps-handling procedures.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CNMG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: CNMG4305MS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CNMG120402MS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCU25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond 80 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 80 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 13 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.5077 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0079 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2031 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.1691 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Honed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: MS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2, C6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiper Edge\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Radius\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KENLOC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Superalloys, Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Turning, Facing, Boring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4050399\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51747467067698,"sku":"4050399","price":182.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a00f76249904658319ff1186c487f942.jpg?v=1788880664","url":"https:\/\/voomisupply.com\/products\/kennametal-4050399-cnmg4305ms-turning-insert-kcu25-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}