{"product_id":"kennametal-4033830-threading-insert-na4r4-kcu25-carbide-altin","title":"Kennametal 4033830 Threading Insert NA4R4 KCU25 Carbide Altin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4033830 is a carbide threading insert in the Top Notch series, designed for cutting Acme threads at 4 threads per inch (TPI) with a 29-degree included angle. The insert carries a KCU25 manufacturer grade and features an AlTiN finish applied via PVD coating, which improves wear resistance and tool life in demanding threading operations. At 0.2551 inches thick with a cutting tip width of 0.0875 inches and a corner radius of 0.0050 inches, this right-hand insert handles both internal and external thread forms. It is installed by machinists and CNC operators using compatible Top Notch toolholders.\u003c\/p\u003e\u003cp\u003eThis insert is suited for threading operations on lathes and CNC turning centers where Acme thread profiles are required. Acme threads are common in lead screws, power transmission components, and linear actuation hardware. The right-hand orientation and 4 TPI pitch make this insert applicable to standard Acme fastener and mechanical drive applications in both production and job-shop environments. The AlTiN PVD coating supports use in a range of workpiece materials where heat resistance and edge retention are priorities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eKCU25 carbide grade with AlTiN PVD coating for extended wear resistance\u003c\/li\u003e\n\u003cli\u003e29-degree included angle for Acme thread profile, 4 TPI internal and external\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting orientation, NA insert style\u003c\/li\u003e\n\u003cli\u003eTop Notch series insert for use with compatible Top Notch toolholders\u003c\/li\u003e\n\u003cli\u003eCorner radius of 0.0050 inches for precise thread root geometry\u003c\/li\u003e\n\u003cli\u003eCutting tip width of 0.0875 inches (2.22 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Top Notch series toolholders that accept NA4 style inserts. Verify toolholder insert seat specifications before installation. No specific model compatibility data was provided beyond the Top Notch series designation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC technician. Power down and lock out the machine before seating or replacing the insert. Use the correct torque and clamping hardware specified for the Top Notch toolholder being used. Inspect the insert seat for chips or debris before installation to prevent seating errors and premature insert failure.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NA\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\u003eSeries\u003c\/strong\u003e: Top Notch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: 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: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.2551 inches (6.48 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth of Cutting Tip\u003c\/strong\u003e: 0.0875 inches (2.22 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\u003eTip to Top of Insert\u003c\/strong\u003e: 0.2020 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.031 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: 4033830\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51729159815474,"sku":"4033830","price":343.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/296edf5a16220114fef815f391e5127a.jpg?v=1788701109","url":"https:\/\/voomisupply.com\/products\/kennametal-4033830-threading-insert-na4r4-kcu25-carbide-altin","provider":"Voomi Supply","version":"1.0","type":"link"}