{"product_id":"tungaloy-6856770-turning-insert-cpmt21-51ps-ah725","title":"Tungaloy 6856770 Turning Insert CPMT21.51PS AH725","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe TUNGALOY 6856770 is a solid carbide turning insert designated by ISO code CPMT21.51PS in manufacturer grade AH725. This insert features a TiAlN coating applied via PVD process, an 80-degree diamond shape, and a positive rake geometry with a honed cutting edge. The inscribed circle measures 0.25 inches, the insert length is 0.256 inches, and the corner radius is 0.0157 inches. With 2 cutting edges and a screw-type holding method, it is suited for precision turning, facing, and boring operations on CNC lathes and turning centers. Licensed machinists and toolroom technicians are the primary installers and operators.\u003c\/p\u003e\n\u003cp\u003eThis insert is designed for use across a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. It is well suited for medium finishing to semi-roughing applications in production turning environments. The PS chip breaker geometry supports stable chip control across these material groups. The maximum depth of cut is 0.0984 inches, making it appropriate for light to moderate material removal passes in both conventional and high-speed turning setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTiAlN coating via PVD process for wear resistance across diverse workpiece materials\u003c\/li\u003e\n  \u003cli\u003e80-degree diamond insert shape with positive rake for reduced cutting forces\u003c\/li\u003e\n  \u003cli\u003ePS chip breaker for effective chip control in turning, facing, and boring\u003c\/li\u003e\n  \u003cli\u003eHoned cutting edge for edge stability and consistent surface finish\u003c\/li\u003e\n  \u003cli\u003e2 usable cutting edges per insert for extended tool economy\u003c\/li\u003e\n  \u003cli\u003eScrew-type insert holding compatible with standard CPMT toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard production insert for CPMT-style toolholders conforming to ANSI and ISO mounting standards. Compatible material grades include P15, P30, M15, M30, K25, K30, S15, and S25 per ISO classification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or toolroom technicians using the appropriate torque wrench for the insert screw specified by the toolholder manufacturer. Power down and lock out the machine spindle before seating or indexing the insert. Inspect the insert pocket and seating surface for chips or debris before installation to ensure proper insert contact and prevent premature edge failure. Follow the toolholder manufacturer's clamping torque specification for the screw size used.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CPMT21.51PS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: AH725\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond 80 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.25 inches (1\/4 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.256 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.0938 inches (3\/32 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0157 inches (1\/64 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.11 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.0984 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 10 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 11 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive\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: PS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\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 Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplications\u003c\/strong\u003e: Turning, Facing, Boring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium, Hard Material\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grades\u003c\/strong\u003e: P15, P30, M15, M30, K25, K30, S15, S25\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: 0.1 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: TUNGALOY\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6856770\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TUNGALOY","offers":[{"title":"Default Title","offer_id":51972146037042,"sku":"6856770","price":164.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/456bf2a84af9b6d43edb0b7162b2e02b.jpg?v=1789963428","url":"https:\/\/voomisupply.com\/products\/tungaloy-6856770-turning-insert-cpmt21-51ps-ah725","provider":"Voomi Supply","version":"1.0","type":"link"}