Kennametal 2217646 Threading Insert 12 Tpi Left Hand

Product Description

The KENNAMETAL 2217646 is a carbide threading insert designed for cutting American Buttress threads at 12 TPI. It carries a TiAlN finish applied via PVD coating process and is manufactured to the KC5010 grade specification. This insert fits the Top Notch toolholding system and handles both internal and external threading operations. The left-hand orientation suits applications where conventional right-hand tooling cannot be used. Machinists and CNC operators use this insert for high-production threading in steel and other ferrous materials where wear resistance and edge retention are critical.

The 2217646 is suited for lathe-based threading operations in production and job-shop environments. Its NTB insert style and size 3 designation are specific to the Top Notch quick-change insert system. The 52-degree included angle is standard for American Buttress thread profiles used in pipe fittings, hydraulic components, and heavy industrial assemblies. Both internal and external thread forms are supported with this single insert.

Key Features

• TiAlN finish via PVD coating for extended tool life in ferrous and hardened materials
• KC5010 manufacturer grade optimized for threading applications
• 12 TPI pitch supports both internal and external American Buttress thread cutting
• Left-hand insert orientation for reverse-direction threading setups
• 52-degree included angle matches American Buttress thread profile standard
• Top Notch Series NTB style for secure, repeatable insert indexing

Compatibility

Designed for use with Top Notch Series NTB-style toolholders accepting size 3 inserts. Confirm toolholder hand orientation matches this left-hand insert before installation.

Installation Notes

Installation is performed by qualified machinists on CNC or manual lathes equipped with compatible Top Notch toolholders. Power down and lock out the machine before seating or indexing the insert. Use the appropriate torx or clamp key as specified by the toolholder manufacturer - do not overtighten the clamping screw. Verify insert hand, pitch, and thread standard against the job drawing before beginning the threading pass.