{"product_id":"kennametal-1799449-threading-insert-acme-4-tpi-left-hand","title":"Kennametal 1799449 Threading Insert Acme 4 Tpi Left Hand","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1799449 is a carbide threading insert designed for cutting Acme thread profiles on both internal and external applications. It features a TiAlN finish applied via PVD coating process, which provides hard surface protection and wear resistance during threading operations. The insert carries the NA4L4 designation, indicating left-hand cut with a 4 TPI internal pitch and a 29-degree included angle. It belongs to the Top Notch series and is manufactured to KC5025 grade, a coated carbide grade suited for threading in steel and cast iron. A licensed machinist or toolroom technician installs this insert into compatible Top Notch threading toolholders on CNC lathes or manual turning equipment.\u003c\/p\u003e\u003cp\u003eThis insert is intended for Acme thread cutting in metalworking environments, including job shops and production floors. The left-hand configuration is specified for applications that require reverse-thread cutting. It handles both internal and external Acme profiles within the same insert style. The 4 TPI pitch makes it appropriate for larger-diameter Acme lead screw and power screw work common in industrial machinery, fixtures, and actuator components. Material grades C2 and C6 indicate suitability for a range of ferrous and non-ferrous workpiece materials.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTiAlN finish via PVD coating for extended wear life in threading applications\u003c\/li\u003e\n\u003cli\u003eLeft-hand cut geometry for reverse-thread Acme profiles\u003c\/li\u003e\n\u003cli\u003eCovers both internal and external thread cutting in one insert style\u003c\/li\u003e\n\u003cli\u003e4 TPI pitch with 29-degree included angle matches standard Acme thread form\u003c\/li\u003e\n\u003cli\u003eKC5025 carbide grade rated for C2 and C6 material classifications\u003c\/li\u003e\n\u003cli\u003eTop Notch series for indexed fit in compatible Kennametal Top Notch toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in Kennametal Top Notch series threading toolholders accepting size 4 inserts. Verify toolholder compatibility with the NA4L4 insert style before ordering.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or CNC toolroom technician. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully in the toolholder pocket and tighten the clamping screw according to the toolholder manufacturer specifications. Inspect the cutting tip and coating condition before each use; do not use chipped or damaged inserts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NA4L4\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: KC5025\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2, C6\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: Left 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\u003eTip to Top of Insert\u003c\/strong\u003e: 0.2020 inches (5.13 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth of Cutting Tip\u003c\/strong\u003e: 0.0874 inches (2.22 mm)\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\u003eFinish Coating\u003c\/strong\u003e: TiAlN\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\u003eWeight\u003c\/strong\u003e: 0.0629 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: 1799449\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51728665903410,"sku":"1799449","price":296.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5472a2f6c2e3ac9995f5dfc2c27f6410.jpg?v=1788694614","url":"https:\/\/voomisupply.com\/products\/kennametal-1799449-threading-insert-acme-4-tpi-left-hand","provider":"Voomi Supply","version":"1.0","type":"link"}