{"product_id":"sandvik-coromant-6868234-turning-insert-ccmt21-52-kr","title":"Sandvik Coromant 6868234 Turning Insert CCMT21.52-KR","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 6868234 is a solid carbide turning insert designated CCMT21.52-KR 3225, part of the CoroTurn 107 series. It features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN engineered for high wear resistance to high toughness in cast iron applications. The insert carries an 80-degree diamond (rhombic) shape with a neutral hand orientation, a 1\/4-inch inscribed circle, and a 1\/32-inch corner radius. With two cutting edges and a KR chip breaker geometry, it handles roughing through medium machining operations. Licensed machinists and CNC operators install this insert in compatible CCMT-style toolholders for external turning and profiling work.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for cast iron workpieces in production turning environments, covering both roughing and medium machining passes. The KR chip breaker geometry promotes controlled chip formation across a range of feed rates and depths of cut, with a maximum depth of cut of 5.65 mm. The grade 3225 is specifically characterized for cast iron (K-grade) applications where wear resistance is the primary concern. It is secured in the toolholder by a screw-clamping method, consistent with standard CCMT indexable insert setups found in both manual lathe and CNC turning center installations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCVD multilayer coating: TiCN, Al2O3, TiN for extended tool life in cast iron\u003c\/li\u003e\n  \u003cli\u003e80-degree diamond insert shape with positive side clearance and 7-degree relief angle\u003c\/li\u003e\n  \u003cli\u003eKR chip breaker geometry rated for roughing and medium machining operations\u003c\/li\u003e\n  \u003cli\u003e1\/32-inch (0.0313 inch) corner radius with rounded cutting edge style\u003c\/li\u003e\n  \u003cli\u003eTwo usable cutting edges per insert for economical indexing\u003c\/li\u003e\n  \u003cli\u003eScrew-held mounting compatible with standard CCMT-style toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CCMT-style screw-clamp toolholders accepting the CCMT21.52 (ISO: CCMT 06 02 08) insert size. Verify toolholder pocket specifications and insert seating before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine before indexing or replacing inserts. Use the correct torque wrench for the clamping screw to avoid insert movement or fracture during operation. Inspect the toolholder pocket for debris or wear before seating a new insert.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: CCMT21.52\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: CCMT 06 02 08-KR 3225\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: C - Diamond (Rhombic) 80 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 3225\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN, Al2O3, TiN (CVD process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: KR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker Operation\u003c\/strong\u003e: Roughing, Medium Machining\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron (K-grade)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 1\/4 inch (0.2500 inch \/ 6.35 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/32 inch (0.0313 inch \/ 0.79 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3\/32 inch (0.0938 inch \/ 2.38 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 7 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Positive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Rounded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 5.65 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1102 inch (2.80 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\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: SANDVIK COROMANT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6868234\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51733764636978,"sku":"6868234","price":194.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5099b6416aa66127c34dc7fe454787ac_4214cc83-b6fa-458a-bdc8-1c71e41fb7e5.jpg?v=1788759026","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-6868234-turning-insert-ccmt21-52-kr","provider":"Voomi Supply","version":"1.0","type":"link"}