{"product_id":"kennametal-4109779-grooving-insert-ng4250-kcu25-carbide-altin","title":"Kennametal 4109779 Grooving Insert NG4250 KCU25 Carbide Altin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4109779 is a solid carbide grooving insert designed for the Top Notch series of grooving toolholders. It features an AlTiN (aluminum titanium nitride) PVD coating that improves wear resistance and extends tool life in demanding turning operations. With a 0.25 inch cutting width and a maximum depth of cut of 0.25 inches, this insert is suited for precision grooving work on ferrous and non-ferrous materials. The KCU25 grade designation indicates a tough carbide substrate optimized for interrupted cuts and challenging workpiece materials. Installation and setup is handled by machinists and CNC lathe operators working in production or job-shop environments.\u003c\/p\u003e\u003cp\u003eThis insert is intended for use in Top Notch series grooving toolholders accepting an insert seat size 4. The left-hand orientation determines proper toolholder compatibility and direction of cut. It is applicable in external grooving operations on CNC lathes and manual turning centers across light to medium-duty production runs. The neutral rake angle and 55-degree included angle support stable cutting geometry during the grooving pass. The 0.045 inch corner radius helps reduce stress concentration at the groove bottom.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction with PVD-applied AlTiN coating for enhanced wear resistance\u003c\/li\u003e\n\u003cli\u003e0.25 inch cutting width for precise groove sizing\u003c\/li\u003e\n\u003cli\u003eMaximum depth of cut range of 0.20 to 0.30 inches\u003c\/li\u003e\n\u003cli\u003eLeft-hand insert orientation for correct toolholder pairing\u003c\/li\u003e\n\u003cli\u003eTop Notch series, insert seat size 4 compatibility\u003c\/li\u003e\n\u003cli\u003eNeutral rake angle and 0-degree lead angle for stable grooving geometry\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Top Notch series grooving toolholders accepting seat size 4 inserts; MSC and manufacturer cross-reference number NG4250R\/L confirms left-hand fitment.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed and replaced by machinists or CNC lathe operators. Power down and lock out the machine before seating or removing inserts. Use the appropriate Top Notch insert clamp and torx or hex key as specified by the toolholder manufacturer. Inspect the insert seat for chips or debris before seating the new insert to ensure proper contact and prevent premature breakage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Top Notch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade\u003c\/strong\u003e: KCU25\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\u003eInsert Hand\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size\u003c\/strong\u003e: 4250\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Seat Size\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Width\u003c\/strong\u003e: 0.25 inches (6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut Range\u003c\/strong\u003e: 0.20 to 0.30 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Height\u003c\/strong\u003e: 0.453 inches (11.51 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0225 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 55 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 0 degrees (Neutral)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Radius\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-use Tool\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Type\u003c\/strong\u003e: Decimal Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 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: 4109779\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51737340739890,"sku":"4109779","price":336.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/54880309f9ec6432473bf2543a8a2d33.jpg?v=1788787325","url":"https:\/\/voomisupply.com\/products\/kennametal-4109779-grooving-insert-ng4250-kcu25-carbide-altin","provider":"Voomi Supply","version":"1.0","type":"link"}