{"product_id":"kennametal-4109641-threading-insert-nas3r4-kcu25-carbide","title":"Kennametal 4109641 Threading Insert NAS3R4 KCU25 Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 4109641 is a carbide threading insert in the Top Notch series, designed for cutting Stub Acme threads at 4 threads per inch (TPI). It carries the KCU25 manufacturer grade and features a physical vapor deposition (PVD)-applied aluminum titanium nitride (AlTiN) finish for heat and wear resistance. The insert is sized at 0.1004 inches wide at the cutting tip, with a 29-degree included angle and a 0.0050-inch corner radius. At 0.1949 inches thick, this right-hand insert fits standard Top Notch toolholders and is suited for both internal and external threading operations performed by machinists and CNC lathe operators in production and job-shop environments.\u003c\/p\u003e\n\u003cp\u003eThis insert is intended for Stub Acme thread-form applications on both internal and external workpieces. The Stub Acme thread standard is commonly used in power transmission components, lead screws, and linear actuator assemblies where a modified Acme profile is required. The KCU25 carbide grade combined with the AlTiN PVD coating makes this insert appropriate for threading steel, alloy steel, and similar ferrous materials at moderate to high cutting speeds. It is a single-insert unit sold in multiples of five.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eKCU25 carbide grade with AlTiN PVD coating for wear resistance in ferrous threading applications\u003c\/li\u003e\n  \u003cli\u003eStub Acme thread form at 4 TPI with a 29-degree included angle\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut geometry for standard lathe and CNC threading setups\u003c\/li\u003e\n  \u003cli\u003eSuitable for both internal and external threading operations\u003c\/li\u003e\n  \u003cli\u003eInsert size 3, compatible with Top Notch series toolholders\u003c\/li\u003e\n  \u003cli\u003e0.0050-inch corner radius for controlled thread root profile\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with Top Notch series threading toolholders that accept a size 3 NAS-style insert. Compatible with both internal and external threading applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThreading inserts are installed and replaced by machinists or CNC operators. Power down and lock out the machine spindle before seating or removing any insert. Ensure the insert pocket and clamping surfaces are clean and free of chips before seating the insert. Follow the toolholder manufacturer torque and clamping guidelines for Top Notch style holders.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NAS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Top Notch\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\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\u003eThread Standard\u003c\/strong\u003e: Stub Acme\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal and External\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Pitch\u003c\/strong\u003e: 4 TPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 29 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Size\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth of Cutting Tip\u003c\/strong\u003e: 0.1004 inches (2.55 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0050 inches (0.13 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1949 inches (4.95 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTip to Top of Insert\u003c\/strong\u003e: 0.1492 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.025 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291804\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: 4109641\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51737709740338,"sku":"4109641","price":213.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6309b28acc99b6b6ae241890a35e5781_63da81de-ee91-48ec-b38a-fb2474ada14b.jpg?v=1788792595","url":"https:\/\/voomisupply.com\/products\/kennametal-4109641-threading-insert-nas3r4-kcu25-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}