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The KENNAMETAL 1799585 is a carbide threading insert in the Top Notch series, designed for precision thread-cutting on both internal and external American Buttress thread profiles. Coated with TiAlN via a PVD process, this left-hand insert handles 16-20 TPI and carries a KC5010 manufacturer grade rated for C3 and C4 material grades. The insert size is 2, with a thickness of 0.15 inches (3.81 mm) and a corner radius of 0.0031 inches (0.08 mm). It is installed by machinists and toolroom technicians on CNC lathes and manual threading equipment where precise Buttress profile geometry is required.
This insert is suited for threading applications in manufacturing environments requiring American Buttress thread forms, commonly found in heavy-load, high-stress mechanical assemblies such as jack screws, press components, and similar industrial hardware. The left-hand orientation makes it specific to left-hand thread cutting operations. Its 45-degree included angle and TiAlN finish make it appropriate for ferrous and non-ferrous materials classified under C3 and C4 grades. The Top Notch series platform provides positive insert location and secure clamping in compatible toolholders.
Designed as an OEM-style replacement threading insert for Top Notch series compatible toolholders accepting size 2 NTB-style inserts for American Buttress thread applications.
Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine before seating or indexing the insert. Ensure the toolholder pocket is clean and free of chips before installing to maintain proper insert seating and geometry. Do not exceed the recommended depth of cut or feed rate for the KC5010 grade as specified in the tooling documentation for the application material.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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