{"product_id":"kennametal-5591799-turning-insert-cnmg643mp-kcm25b-carbide","title":"Kennametal 5591799 Turning Insert CNMG643MP KCM25B Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 5591799 is a CNMG643MP indexable turning insert in grade KCM25B, designed for steel and stainless steel turning operations where toughness and moderate wear resistance are priorities. The insert features a multilayer CVD coating consisting of TiCN, Al2O3, and TiOCN applied by MTCVD process, delivering thermal and abrasion protection during continuous and interrupted cuts. With an 80-degree diamond (rhombic) shape, negative rake, and neutral hand, it fits standard KENLOC-style toolholders and is suited for roughing and medium machining passes. Four cutting edges extend tool life per insert.\u003c\/p\u003e\n\u003cp\u003eThis insert is intended for use in CNC turning centers and conventional lathes performing turning, facing, and boring operations. Primary workpiece materials include steel, stainless steel, superalloys, and titanium. The MP chip breaker geometry is optimized for roughing and medium material removal rates, making it a practical choice for production shops running P- and M-grade workpiece materials. Licensed machinists and CNC operators in job shops, aerospace, and general manufacturing environments are the typical installers and users of this insert series.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCNMG643MP geometry with 80-degree diamond shape and negative rake for stable, rigid cutting\u003c\/li\u003e\n  \u003cli\u003eKCM25B grade with multilayer CVD TiCN\/Al2O3\/TiOCN coating for high toughness in steel and stainless steel\u003c\/li\u003e\n  \u003cli\u003eMP chip breaker optimized for roughing and medium machining applications\u003c\/li\u003e\n  \u003cli\u003e4 cutting edges per insert reduce per-edge tooling cost\u003c\/li\u003e\n  \u003cli\u003eNeutral hand orientation for use in left- or right-hand toolholder setups\u003c\/li\u003e\n  \u003cli\u003eCompatible with clamp and pin insert holding methods per KENLOC series design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in KENLOC-series toolholders accepting CNMG643 (ISO CNMG190612) negative-rake inserts. Compatible with clamp and pin holding methods. Verified by ANSI and ISO standards. Refer to KENNAMETAL toolholder documentation to confirm seating and clamping compatibility before use.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInsert replacement and indexing should be performed by a qualified machinist or CNC toolroom technician with the spindle at a full stop and machine in a locked-out, tagged-out state. Use the appropriate torque wrench and seating pin for KENLOC-style clamp systems — follow the toolholder manufacturer torque specifications for the clamping screw. Inspect the insert pocket and clamping surfaces for chips or wear before seating a new insert. Never run a chipped or cracked 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: CNMG643\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: CNMG190612\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: CNMG643MP\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCM25B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: C - Diamond (Rhombic) 80-Degree\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCN, Al2O3, TiOCN (Multilayer CVD \/ MTCVD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: MP (Roughing, Medium Machining)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\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\u003eCorner Radius\u003c\/strong\u003e: 3\/64 inches (0.0469 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 19.34 mm (0.7616 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\u003eHole Diameter\u003c\/strong\u003e: 0.3125 inches (7.93 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.2536 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Negative\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 6 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Negative\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Chamfered, Honed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp, Pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Superalloys, Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KENLOC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\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\u003eWeight\u003c\/strong\u003e: 0.0639 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: KENNAMETAL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5591799\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51749309350194,"sku":"5591799","price":80.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f50262d3f7ec5e501e01b8d2c92c15db_c678d79e-1218-4b9d-98c9-adba93b0b65a.jpg?v=1788904356","url":"https:\/\/voomisupply.com\/products\/kennametal-5591799-turning-insert-cnmg643mp-kcm25b-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}