{"product_id":"kennametal-4109776-grooving-insert-ng4189-kcu25-carbide","title":"Kennametal 4109776 Grooving Insert NG4189 KCU25 Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 4109776 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and turning operations on CNC lathes and turning centers. It carries a KCU25 manufacturer grade with an AlTiN coating applied via PVD process, delivering elevated heat resistance and edge wear performance in steel and cast iron applications. The insert provides a 4.80 mm cutting width and a maximum depth of cut of 6.35 mm, with a corner radius of 0.57 mm. It is a right-hand insert configured for clamp-style toolholders and is sized to the Top Notch NG4189 seat. Machinists and toolroom technicians working with metric setups will find this insert suited to medium-duty grooving at standard lathe cutting parameters.\u003c\/p\u003e\n\u003cp\u003eThis insert fits residential and commercial machine shop environments as well as production turning lines wherever the Top Notch NG4189 toolholder platform is in use. Typical applications include external grooving, face grooving lead-ins, and undercut operations on ferrous and non-ferrous workpieces. The KCU25 carbide grade with AlTiN finish is well-suited for interrupted cuts and moderate chip loads. The insert is sold individually but carries a minimum order quantity of 5 units, making it appropriate for tool crib stocking or small-batch replenishment programs.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction with PVD-applied AlTiN coating for extended tool life in ferrous materials\u003c\/li\u003e\n  \u003cli\u003e4.80 mm cutting width with a maximum depth of cut range of 5.00 mm to 10.00 mm\u003c\/li\u003e\n  \u003cli\u003e0.57 mm corner radius for controlled chip formation in precision grooving\u003c\/li\u003e\n  \u003cli\u003eRight-hand orientation, clamp-style holding method compatible with Top Notch NG seat toolholders\u003c\/li\u003e\n  \u003cli\u003e55-degree included angle geometry for stable, low-vibration grooving cuts\u003c\/li\u003e\n  \u003cli\u003eKCU25 grade rated for material grades C2 and C6 workpiece categories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with Top Notch series clamp-style toolholders accepting an NG4189 insert seat size 4. The MSC\/Manufacturer cross-reference number is NG4189R\/L.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis insert is installed by a machinist or toolroom technician using the appropriate Top Notch clamp and toolholder assembly. Before indexing or replacing the insert, confirm the machine spindle is stopped and all axis motion is locked out per shop lockout\/tagout procedures. Seat the insert firmly against the toolholder pocket and verify clamp engagement before resuming cuts. Do not exceed the stated maximum depth of cut range, as overloading a grooving insert can cause sudden fracture.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eManufacturer Grade\u003c\/strong\u003e: KCU25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2, C6\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: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Width\u003c\/strong\u003e: 4.80 mm (0.1890 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 6.35 mm (0.2500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut Range\u003c\/strong\u003e: 5.00 mm to 10.00 mm (0.2000 to 0.3000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.57 mm (0.0225 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Height\u003c\/strong\u003e: 11.51 mm (0.4530 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 6.50 mm (0.256 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Size\u003c\/strong\u003e: 4189\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Seat Size\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 55 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Radius\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement Type\u003c\/strong\u003e: Metric\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 11.8 inches length x 3.9 inches width x 1.5 inches height\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.001 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\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: 4109776\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51744836616498,"sku":"4109776","price":335.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b5e19cff2ee0bfc4b1dce916e735b85b.jpg?v=1788861259","url":"https:\/\/voomisupply.com\/products\/kennametal-4109776-grooving-insert-ng4189-kcu25-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}