{"product_id":"seco-74070273-round-turning-insert-carbide-uncoated","title":"Seco 74070273 Round Turning Insert Carbide Uncoated","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SECO 74070273 is a solid carbide, uncoated round turning insert designed for precision metal cutting on CNC lathes and turning centers. Built to ANSI and ISO standards, it carries the RNMG insert style with a full-radius round shape (Insert Shape Code R) and a negative rake geometry. The manufacturer grade is 883, a carbide substrate optimized for superalloys and titanium. With an inscribed circle of 0.5 inches and a corner radius of 0.25 inches, this insert provides a generous cutting arc suited to profiling, facing, and turning operations. The MR4 chip breaker geometry and T-Land cutting edge style are engineered to manage tough, work-hardening materials common in aerospace and high-temperature alloy machining.\u003c\/p\u003e\u003cp\u003eThis insert is intended for high-demand turning applications involving superalloys, titanium, and secondary workpiece materials including steel, cast iron, non-ferrous, and hardened materials. The MR4 series chip breaker performs across facing, profiling, and longitudinal turning operations. It is most commonly installed and used by CNC machinists and toolroom professionals working on turning centers in industrial and aerospace manufacturing environments. The insert is sold individually but carries a minimum order quantity of 10 units per order.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRound insert shape (RNMG style) with full radius for continuous profiling and facing\u003c\/li\u003e\n\u003cli\u003eSolid carbide grade 883 substrate — uncoated, bright finish for superalloy and titanium primary applications\u003c\/li\u003e\n\u003cli\u003eMR4 chip breaker with T-Land cutting edge for controlled chip formation in tough materials\u003c\/li\u003e\n\u003cli\u003e8 available cutting edges per insert for extended tool life and cost efficiency\u003c\/li\u003e\n\u003cli\u003eNegative rake geometry with 0 degree relief angle for high cutting-edge strength\u003c\/li\u003e\n\u003cli\u003eCompatible with clamp, pin, and lever lock toolholding systems\u003c\/li\u003e\n\u003cli\u003eMeets ANSI and ISO standards; ISO code RNMG120400-MR4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit insert for RNMG-MR4 series toolholders accepting a 0.5-inch inscribed circle round insert with a 0.2028-inch hole diameter using clamp, pin, or lever lock holding methods.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before seating or indexing the insert. Ensure the toolholder pocket and seating surface are clean and free of chips before clamping. Follow the toolholder manufacturer torque specifications for the clamping screw or lever lock — do not overtighten, as this can fracture carbide inserts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: RNMG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: RNMG-MR4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 883\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Round (Full Radius)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape Code\u003c\/strong\u003e: R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5000 inches (12.70 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1874 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2028 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.2500 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\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\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\u003eChip Breaker\u003c\/strong\u003e: MR4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: T-Land\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated (Bright)\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\u003eInsert Holding Method\u003c\/strong\u003e: Clamp; Pin; Lever Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Superalloys and Titanium (Code S)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material Codes\u003c\/strong\u003e: M; K; N; H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: S10; S20; S30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Facing; Profiling; Turning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: RNMG120400-MR4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: RNMG43-MR4\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\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SECO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 74070273\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51558754255154,"sku":"74070273","price":197.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ff3a8ea2919b9dbf02d61b843185fde6.jpg?v=1786419728","url":"https:\/\/voomisupply.com\/products\/seco-74070273-round-turning-insert-carbide-uncoated","provider":"Voomi Supply","version":"1.0","type":"link"}