{"product_id":"tool-flo-0239040ac50e-acme-threading-insert-4-tpi","title":"Tool-flo 0239040AC50E Acme Threading Insert 4 Tpi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe TOOL-FLO 0239040AC50E is a solid carbide, on-edge threading insert designed for Acme thread forms on both external and internal applications. The insert features a neutral cutting direction and neutral rake geometry, making it suited for straight, non-handed setups. With a 0.5-inch inscribed circle (IC) and an AlTiN coating applied via PVD process, this insert delivers thermal resistance and surface hardness at the cutting edge. It runs at 4 threads per inch (TPI) on both external and internal passes. Machinists and toolroom operators use this insert in CNC turning and threading operations where Acme thread profiles are required on cast iron or steel workpieces.\u003c\/p\u003e\u003cp\u003eThis insert is intended for threading operations on ferrous materials, specifically cast iron (ISO K) and steel (ISO P). The on-edge series design positions the insert at the cutting edge for precise thread form engagement. Typical installations include power transmission components, lead screws, and other Acme-threaded parts machined on CNC lathes or threading-dedicated turning centers. The neutral hand designation allows the insert to be used in both directions of cut without requiring a dedicated right- or left-hand holder.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide substrate with PVD-applied AlTiN coating for extended tool life on ferrous materials\u003c\/li\u003e\n\u003cli\u003eAcme thread form, external and internal, 4 TPI\u003c\/li\u003e\n\u003cli\u003eNeutral cutting direction and neutral rake for flexible setup in standard threading toolholders\u003c\/li\u003e\n\u003cli\u003e0.5-inch inscribed circle (IC) for compatibility with standard on-edge insert pockets\u003c\/li\u003e\n\u003cli\u003eCutting tip width of 0.0875 inches for accurate Acme profile geometry\u003c\/li\u003e\n\u003cli\u003eCylindrical hole shape for secure mechanical clamping in compatible toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in on-edge threading toolholders that accept TNMA-style inserts with a 0.5-inch IC and cylindrical clamping hole. Suited for Acme threading of cast iron and steel workpieces per ISO material groups K and P.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before seating or removing the insert. Ensure the insert pocket and clamping screw are clean and free of chips before securing the insert. Follow the toolholder manufacturer's torque specifications for the clamping screw and verify thread form alignment with a thread gauge before running production parts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: TNMA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 43\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: AC50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External and Internal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: Acme\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Threads Per Inch\u003c\/strong\u003e: 4 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Threads Per Inch\u003c\/strong\u003e: 4 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle (IC)\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Tip Width\u003c\/strong\u003e: 0.0875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.189 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Shape\u003c\/strong\u003e: Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: TOOL-FLO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 0239040AC50E\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TOOL-FLO","offers":[{"title":"Default Title","offer_id":67907324477746,"sku":"0239040AC50E","price":43.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bcb66d94a18b77a640afcbf658aa650f.jpg?v=1791177188","url":"https:\/\/voomisupply.com\/products\/tool-flo-0239040ac50e-acme-threading-insert-4-tpi","provider":"Voomi Supply","version":"1.0","type":"link"}