{"product_id":"kennametal-4050520-snmg643rp-kcu25-carbide-turning-insert","title":"Kennametal 4050520 SNMG643RP KCU25 Carbide Turning Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4050520 is a solid carbide turning insert in the SNMG643RP geometry, coated with AlTiN via a PVD process and graded KCU25. It is part of the KENLOC series and is designed for external and internal turning, facing, and boring operations on CNC and manual lathes. The square insert shape provides 8 cutting edges, and the RP chip breaker is optimized for roughing and medium machining. The KCU25 grade delivers moderate wear resistance combined with toughness, making it well suited to interrupted cuts and variable stock conditions. The 3\/4-inch inscribed circle and 0.0469-inch corner radius define the cutting geometry.\u003c\/p\u003e\u003cp\u003eThis insert is intended for machining steel, stainless steel, cast iron, aluminum and non-ferrous materials, as well as superalloys and titanium. It carries ISO material codes P, M, K, N, and S, reflecting broad workpiece compatibility across production and job-shop environments. Typical applications include general turning, shoulder facing, and boring passes where moderate chip loads and reliable edge life are required. It is installed by machinists and CNC operators working in precision metalworking, aerospace, energy, and general manufacturing. The RP chip breaker geometry handles chip control across a range of feed rates common in roughing and semi-finish passes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eKCU25 AlTiN PVD coating provides moderate wear resistance and toughness across steel, stainless steel, cast iron, and non-ferrous workpieces\u003c\/li\u003e\n\u003cli\u003eSquare insert shape (SNMG) delivers 8 usable cutting edges per insert\u003c\/li\u003e\n\u003cli\u003eRP chip breaker geometry engineered for roughing and medium machining applications\u003c\/li\u003e\n\u003cli\u003eNegative rake and negative side clearance support heavy interrupted cutting without edge chipping\u003c\/li\u003e\n\u003cli\u003eCompatible with clamp and pin holding methods for flexible toolholder use\u003c\/li\u003e\n\u003cli\u003eChamfered and honed cutting edge preparation balances strength and sharpness\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement insert conforming to ANSI designation SNMG643RP and ISO designation SNMG190612RP. Fits KENLOC-series and other SNMG-compatible toolholders accepting a 3\/4-inch inscribed circle square insert with a 0.3125-inch hole diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert installation and indexing should be performed by a qualified machinist with the machine spindle fully stopped and all energy sources locked out per applicable machine safety procedures. Use the appropriate torque wrench and insert screw for the toolholder manufacturer's specified clamping torque to avoid seat damage. Inspect the toolholder pocket and clamping components for wear or debris before seating a new insert. Do not exceed the maximum depth of cut of 0.2498 inches as specified for this geometry.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: SNMG643RP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: SNMG190612RP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCU25\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: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: S - Square\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/4 inches (0.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 3\/4 inches (0.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 1\/4 inches (0.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 3\/64 inches (0.0469 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.2498 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: RP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker Operation\u003c\/strong\u003e: Roughing and Medium Machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 5 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: M\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\u003eCutting Edge Style\u003c\/strong\u003e: Chamfered and Honed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Aluminum and Non-Ferrous, Superalloys and 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\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KENLOC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2, C6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 5.82 inches L x 2.79 inches W x 1.07 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0624 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: 4050520\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51727368454450,"sku":"4050520","price":338.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5354d28998f8fdd6ecca6998a3dfa6b1.jpg?v=1788676832","url":"https:\/\/voomisupply.com\/products\/kennametal-4050520-snmg643rp-kcu25-carbide-turning-insert","provider":"Voomi Supply","version":"1.0","type":"link"}