{"product_id":"kennametal-3781278-grooving-insert-3mm-a4-kcu10","title":"Kennametal 3781278 Grooving Insert 3mm A4 KCU10","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 3781278 is a solid carbide grooving insert designed for precision groove turning and parting operations on CNC lathes and turning centers. It carries the KCU10 manufacturer grade with a Physical Vapor Deposition (PVD)-applied AlTiN coating, which provides thermal resistance and extended tool life in demanding cutting conditions. The insert features a 3.00 mm cutting width, a maximum depth of cut of 2.90 mm, and a positive rake geometry with a GUP chip breaker. It is installed by machinists and CNC turning technicians working in metal-cutting production environments.\u003c\/p\u003e\u003cp\u003eThis insert is suited for grooving, recessing, and light parting operations in ferrous and non-ferrous materials where the KCU10 carbide grade and AlTiN finish provide reliable performance. The neutral hand orientation allows use in standard A4-series toolholders without a left- or right-hand restriction. The GUP chip breaker geometry is optimized for chip control across a range of feed rates and materials typically encountered in general-purpose turning. Material grades C3 and C4 indicate suitability for a broad range of workpiece materials in medium to fine finishing conditions.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3.00 mm cutting width with a maximum depth of cut of 2.90 mm for controlled groove profiles\u003c\/li\u003e\n\u003cli\u003eKCU10 solid carbide grade with PVD AlTiN coating for heat and wear resistance\u003c\/li\u003e\n\u003cli\u003ePositive rake geometry with GUP chip breaker promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eCorner radius of 0.20 mm (0.0079 inches) for tight groove-bottom tolerances\u003c\/li\u003e\n\u003cli\u003eNeutral hand — compatible with standard A4-series insert pockets without orientation restrictions\u003c\/li\u003e\n\u003cli\u003eMetric insert sizing in the A4 series for consistent toolholder fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in A4-series grooving toolholders that accept the A4G0300 insert style. Refer to the toolholder manufacturer specifications to confirm pocket geometry and clamping method compatibility before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is seated and secured by a qualified machinist or CNC turning technician. Power down and lock out the machine spindle before changing inserts. Inspect the toolholder pocket for debris, damage, or wear before seating the insert, as a contaminated or worn pocket will affect seating accuracy and cutting performance. Follow the toolholder manufacturer torque specifications for the clamping screw — do not over-tighten, as carbide inserts are brittle and can crack under excessive clamp load.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: A4G\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: A4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCU10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Width\u003c\/strong\u003e: 3.00 mm (0.1181 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 2.90 mm (0.1142 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.20 mm (0.0079 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 0.7874 inches\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\u003eChip Breaker\u003c\/strong\u003e: GUP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C3, C4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size\u003c\/strong\u003e: 0300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Type\u003c\/strong\u003e: Metric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Radius\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 3781278\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51747761717554,"sku":"3781278","price":531.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1c83ece96a8717dd52fd3ef8bce4e88a.jpg?v=1788885180","url":"https:\/\/voomisupply.com\/products\/kennametal-3781278-grooving-insert-3mm-a4-kcu10","provider":"Voomi Supply","version":"1.0","type":"link"}