Kennametal 1112992 Threading Insert NAS3L6 KC730 Carbide

Product Description

The KENNAMETAL 1112992 is a carbide threading insert designed for precision thread cutting in metalworking and machining applications. Part of the Top Notch series, this NAS-style insert features a KC730 grade substrate with a Titanium Nitride (TiN) finish applied via PVD coating, which extends cutting edge life and reduces built-up edge on ferrous materials. It cuts Stub Acme thread forms at 6 TPI with a 29-degree included angle, and is configured for left-hand threading. The insert carries material grades C2, C3, and C4, making it suitable for a range of workpiece materials common in production turning environments. Machinists and CNC lathe operators are the primary installers of this insert.

This insert is suited for both internal and external Stub Acme thread cutting on CNC and manual lathes. The Top Notch series is a common platform used in production shops handling threaded rod, lead screw, and power transmission component work where Stub Acme thread forms are specified. The left-hand configuration is important to confirm before ordering, as it is not interchangeable with right-hand toolholders. Insert size 3 must be matched to a compatible Top Notch series toolholder with the appropriate pocket geometry.

Key Features

• KC730 carbide grade with PVD Titanium Nitride (TiN) coating for extended tool life on ferrous materials
• Stub Acme thread form at 6 TPI with 29-degree included angle for accurate thread geometry
• Left-hand cut configuration for left-hand thread and toolholder setups
• Cuts both internal and external threads with a single insert style
• Corner radius of 0.0650 inches for consistent thread root form
• NAS insert style in the Top Notch series for secure, repeatable seating

Compatibility

Designed for use in Top Notch series toolholders accepting an NAS-style, size 3 insert with a left-hand configuration. Confirm toolholder pocket geometry and hand orientation before installation.

Installation Notes

This insert is installed and replaced by machinists or CNC tooling technicians. Power down and lock out the lathe spindle before changing inserts. Use the correct torque wrench and clamping screw specified for the Top Notch toolholder to seat the insert properly - do not overtighten or substitute hardware. Verify thread hand, TPI, and included angle against the job drawing before cutting.