{"product_id":"kennametal-4109950-threading-insert-nt4lk-kcu25-carbide","title":"Kennametal 4109950 Threading Insert NT4LK KCU25 Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4109950 is a carbide threading insert in the Top Notch series, designed for both internal and external thread-cutting operations on CNC lathes and turning centers. Coated with AlTiN via a PVD process, it delivers excellent wear resistance and thermal stability in demanding threading applications. The insert is configured in a left-hand orientation with a partial profile 60-degree thread form and an included angle of 60 degrees. External pitch range spans 1.25 to 6.25 mm (4 to 20 TPI), while internal pitch range covers 2.00 to 6.25 mm (4 to 12 TPI). Machinists and CNC operators working in metalworking shops and production environments install this insert for precision threading work.\u003c\/p\u003e\u003cp\u003eThis insert is suited for threading applications requiring a left-hand partial profile 60-degree form in both internal and external configurations. The Top Notch series tooling system is a common platform used across job shops and production machining environments. The AlTiN coating makes it appropriate for dry or semi-dry cutting conditions and high-temperature materials. It is compatible with the NT4LK insert style and KCU25 grade tooling holders designed for the Top Notch system.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCarbide substrate with AlTiN finish applied via PVD coating process for extended tool life\u003c\/li\u003e\n\u003cli\u003eLeft-hand insert orientation for left-hand thread-cutting operations\u003c\/li\u003e\n\u003cli\u003ePartial profile 60-degree thread form handles both internal and external threading in a single insert style\u003c\/li\u003e\n\u003cli\u003eExternal pitch range: 1.25 to 6.25 mm (4 to 20 TPI)\u003c\/li\u003e\n\u003cli\u003eInternal pitch range: 2.00 to 6.25 mm (4 to 12 TPI)\u003c\/li\u003e\n\u003cli\u003eCorner radius of 0.17 mm (0.0067 inches) for consistent thread form accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Top Notch series threading toolholders accepting NT4LK style inserts. Compatible with KCU25 grade tooling setups for partial profile 60-degree internal and external threading operations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a CNC machinist or toolroom technician. Power down and lock out the machine before changing inserts. Seat the insert firmly in the Top Notch toolholder pocket and torque the clamp screw per the toolholder manufacturer's specification. Inspect the insert seating surface and clamp for debris or wear before each installation to avoid chatter or thread form error.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCU25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: Partial Profile 60 Degree\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal and External\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Pitch\u003c\/strong\u003e: 1.25 to 6.25 mm (4 to 20 TPI)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Pitch\u003c\/strong\u003e: 2.00 to 6.25 mm (4 to 12 TPI)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Top Notch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish Coating\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 Size\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip to Top of Insert\u003c\/strong\u003e: 0.1280 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.17 mm (0.0067 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 2.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 7.1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 14.8 inches\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: 23291804\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: 4109950\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":67650256830770,"sku":"4109950","price":303.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ec6f8025d303736261a889a82bab004d_f2d4b00d-60e0-45c5-9b9d-18374fa2e773.jpg?v=1790461663","url":"https:\/\/voomisupply.com\/products\/kennametal-4109950-threading-insert-nt4lk-kcu25-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}