Kennametal 1799447 Threading Insert NA4R4 KC5025 Carbide

Product Description

The KENNAMETAL 1799447 is a carbide threading insert designed for Acme thread forms on both internal and external threading operations. It carries the NA4R4 insert style designation and operates in the KC5025 manufacturer grade, finished with a PVD-applied TiAlN coating that improves wear resistance and tool life at elevated cutting temperatures. The insert is right-hand cut, sized at Insert Size 4, and is rated for a 4 TPI internal pitch with a 29-degree included angle. It fits within Kennametal's Top Notch series tooling system and is suited for production threading on lathes and turning centers where Acme thread profiles are required.

This insert is used in machining environments where Acme thread forms are cut on workpieces requiring either internal or external threading. Typical applications include lead screw production, power transmission components, and other precision threading tasks performed by machinists on CNC or manual turning equipment. The TiAlN coating and KC5025 carbide grade make it appropriate for use on a range of workpiece materials including steel and cast iron classified under material grades C2 and C6.

Key Features

• Carbide substrate with PVD-applied TiAlN finish for extended tool life and heat resistance
• KC5025 manufacturer grade rated for C2 and C6 material grades
• 4 TPI internal pitch, 29-degree included angle for Acme thread standard
• Right-hand cut, NA4R4 insert style for use in Top Notch series holders
• Suitable for both internal and external Acme threading operations
• Insert Size 4 with a tip-to-top height of 0.2020 inches and cutting tip width of 0.0874 inches

Compatibility

Designed for use with Kennametal Top Notch series threading toolholders that accept Size 4 inserts. Verify holder compatibility with NA4R4 insert style and right-hand orientation before installation.

Installation Notes

Installation is performed by qualified machinists familiar with indexable insert tooling systems. Power down and lock out the machine spindle before seating or replacing the insert. Ensure the insert pocket and clamping surfaces are clean and free of chips before torquing the clamp screw to the toolholder manufacturer's specification. Do not exceed the recommended depth of cut or feed rate for the KC5025 grade as specified in Kennametal's cutting data recommendations.