Kennametal 1799451 Threading Insert NA6R2 KC5025 Carbide

Product Description

The KENNAMETAL 1799451 is a Top Notch series carbide threading insert designed for cutting Acme thread forms on both internal and external workpiece features. Manufactured from carbide stock and finished with a PVD-applied TiAlN coating, this insert delivers hard, wear-resistant performance in demanding threading applications. The NA6R2 geometry is a right-hand insert with a 29-degree included angle, sized for a 2 TPI internal pitch. The insert measures 0.3831 inches thick and carries a tip-to-top dimension of 0.2831 inches. It seats into compatible Top Notch toolholders and is the type of insert a machinist or toolroom tech replaces as part of routine insert rotation in a CNC or manual lathe threading operation.

This insert is suited for shops producing Acme-threaded components in materials rated for C2 and C6 carbide grades. Typical applications include power-transmission lead screws, jack screws, and vise components machined on CNC turning centers or engine lathes. The TiAlN PVD coating makes it a practical choice for dry or semi-dry cutting conditions where heat resistance and coating adhesion are priorities. Insert size 6 corresponds to the Top Notch holder system, making toolholder compatibility a key consideration before ordering.

Key Features

• Carbide substrate with PVD TiAlN coating for heat and wear resistance
• 29-degree included angle matches Acme thread form geometry
• Right-hand orientation, cuts internal and external threads
• 2 TPI internal pitch rating for coarse Acme thread production
• Top Notch series insert size 6 for use in matching Top Notch toolholders
• Width of cutting tip: 0.1803 inches (4.58 mm) for defined thread form accuracy

Compatibility

Designed for use in Top Notch series toolholders accepting insert size 6. Rated for material grades C2 and C6. Cuts both internal and external Acme thread forms at 2 TPI. Confirm toolholder seat and clamping style before substituting into an existing setup.

Installation Notes

Threading inserts of this type are seated and clamped by a licensed machinist or toolroom technician following the toolholder manufacturer's clamping procedure. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret before changing inserts. Inspect the insert pocket and seating surface for chips or debris before seating the new insert. Follow shop-standard tool offset and trial-cut procedures after any insert change to verify thread form and pitch before running production parts.