{"product_id":"kennametal-4109921-grooving-insert-nr4062k-kcu25-left-hand","title":"Kennametal 4109921 Grooving Insert NR4062K KCU25 Left Hand","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 4109921 is a solid carbide grooving insert in the Top Notch series, designed for precision grooving and turning operations on CNC lathes and turning centers. It carries an AlTiN (aluminum titanium nitride) PVD coating for improved wear resistance and heat dissipation at the cutting edge. The insert delivers a 3.18 mm cutting width and a maximum depth of cut of 3.81 mm, making it suited for moderate-depth grooving passes. The NR4062K designation identifies the insert style, size, and K chip breaker geometry. This insert is installed and replaced by machinists and CNC operators working with ferrous and nonferrous workpiece materials.\u003c\/p\u003e\n\u003cp\u003eThe 4109921 is intended for grooving and recessing applications in production and job-shop turning environments. Its left-hand orientation determines tool holder and approach direction on the machine. The full-radius cutting edge with a 1.59 mm corner radius supports clean groove-bottom finishes. It is compatible with Top Notch series clamp-style insert holders that accept size 4 insert seats. Typical applications include external and internal grooving on turned components where tight width tolerances and controlled chip evacuation are required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAlTiN PVD coating for elevated wear resistance and thermal protection at the cutting edge\u003c\/li\u003e\n  \u003cli\u003e3.18 mm cutting width with a full radius geometry for consistent groove-bottom finish\u003c\/li\u003e\n  \u003cli\u003eMaximum depth of cut of 3.81 mm, with a rated depth-of-cut range of 3.00 mm to 4.00 mm\u003c\/li\u003e\n  \u003cli\u003eLeft-hand insert orientation for use with corresponding Top Notch holders\u003c\/li\u003e\n  \u003cli\u003eK chip breaker design for controlled chip formation during grooving passes\u003c\/li\u003e\n  \u003cli\u003eClamp-style insert holding method for secure, repeatable seating in the holder\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 that accept a size 4 insert seat. Confirm holder hand orientation and insert seat size before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInsert installation and replacement should be performed by a qualified machinist or CNC operator with the machine powered off and the spindle locked. Use the correct torque driver or clamp screw specified by the toolholder manufacturer to secure the insert — do not overtighten the clamp screw by hand estimation alone. Inspect the insert seat and clamp for debris or wear before seating a new insert. Verify cutting direction, insert hand, and depth-of-cut programming before resuming operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NR\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\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\u003eCutting Width\u003c\/strong\u003e: 3.18 mm (0.1252 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 3.81 mm (0.1500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDepth of Cut Range\u003c\/strong\u003e: 3.00 mm to 4.00 mm (0.1500 to 0.2000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1.59 mm (0.0626 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Radius\u003c\/strong\u003e: Yes\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 Length\u003c\/strong\u003e: 1.113 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: 4062\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Seat Size\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: K\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 55 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2, C6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement Type\u003c\/strong\u003e: Metric\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.055 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: 4109921\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51727516270898,"sku":"4109921","price":399.61,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b3845c5dc9de6836a0bb17bbcc9afea6.jpg?v=1788678791","url":"https:\/\/voomisupply.com\/products\/kennametal-4109921-grooving-insert-nr4062k-kcu25-left-hand","provider":"Voomi Supply","version":"1.0","type":"link"}