{"product_id":"walter-6650915-turning-insert-ccmt-wkk20s-carbide","title":"Walter 6650915 Turning Insert Ccmt WKK20S Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WALTER 6650915 is a solid carbide turning insert in the CCMT series, designed for precision metal cutting in turning, facing, and boring operations. It carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiCN under the WKK20S grade designation, delivering strong wear resistance and thermal stability at the cutting edge. The insert features an 80-degree diamond shape, a neutral hand orientation, a positive rake angle of 12 degrees, and a chamfered and honed cutting edge style. With two usable cutting edges per insert, it provides consistent performance across multiple setups. Licensed machinists and toolroom technicians typically select this insert for medium to light finishing passes on cast iron and steel components.\u003c\/p\u003e\n\u003cp\u003eThis insert is rated primarily for cast iron workpieces (ISO material code K, grade K20) and secondarily for steel (ISO material code P, grade P10). The RK4 chip breaker geometry supports controlled chip formation during turning, facing, and boring operations on CNC lathes and turning centers. It is sized for standard CCMT toolholders and is a multi-use insert suited to both production and maintenance machining environments. The ISO designation is CCMT09T308-RK4 WKK20S and the industry standard number is CCMT3(2.5)2-RK4 WKK20S.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: TiCN \/ Al2O3 \/ TiCN under WKK20S grade for extended tool life on cast iron and steel\u003c\/li\u003e\n  \u003cli\u003e80-degree diamond insert shape (Shape Code C) with positive 12-degree rake angle\u003c\/li\u003e\n  \u003cli\u003eRK4 chip breaker geometry supports turning, facing, and boring applications\u003c\/li\u003e\n  \u003cli\u003eChamfered and honed cutting edge for stable entry and reduced edge chipping\u003c\/li\u003e\n  \u003cli\u003eTwo cutting edges per insert; screw-type insert holding method\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI and ISO standards; ISO code CCMT09T308-RK4 WKK20S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement for standard CCMT-series screw-on toolholders accepting an 80-degree diamond insert with a 3\/8-inch inscribed circle. ISO designation CCMT09T308-RK4 WKK20S and industry standard number CCMT3(2.5)2-RK4 WKK20S confirm cross-reference fitment. Primary workpiece materials are cast iron (K20) and steel (P10).\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis insert is installed by a qualified machinist or toolroom technician using the screw-type clamping method standard to CCMT toolholders. Always power down and lock out the machine spindle before changing inserts. Inspect the toolholder pocket and clamping screw for wear or damage before seating a new insert. Follow the toolholder manufacturer's clamping torque specifications and applicable shop safety procedures when securing the insert.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Series\u003c\/strong\u003e: CCMT-RK4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CCMT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond 80 (Shape Code C)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 80 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: WKK20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN \/ Al2O3 \/ TiCN (CVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: RK4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 12 degrees\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\u003eRelief Angle (Clearance Code C)\u003c\/strong\u003e: 7 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inches (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.3810 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 5\/32 inches (0.1563 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/32 inches (0.0315 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1730 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.2000 inches (4.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron (Code K, Grade K20)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Steel (Code P, Grade P10)\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\u003eISO Code\u003c\/strong\u003e: CCMT09T308-RK4 WKK20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: CCMT3(2.5)2-RK4 WKK20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: WALTER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6650915\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALTER","offers":[{"title":"Default Title","offer_id":51980115870002,"sku":"6650915","price":32.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c5c12872ce3294470f2e0f137833b3b4.jpg?v=1789981323","url":"https:\/\/voomisupply.com\/products\/walter-6650915-turning-insert-ccmt-wkk20s-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}