Kennametal 1113505 Threading Insert NT3L K68 Carbide

Product Description

The KENNAMETAL 1113505 is a carbide threading insert in the NT3L K68 configuration, designed for cutting both internal and external threads on a lathe or CNC turning center. It carries a bright, uncoated finish and conforms to a partial profile 60-degree thread standard, covering external pitches from 1.25 to 4.00 mm (6 to 20 TPI) and internal pitches from 2.00 to 5.00 mm (5 to 12 TPI). The K68 grade carbide substrate handles a wide range of workpiece materials. This is a left-hand insert intended for left-hand threading operations. Professional machinists and CNC operators install this insert into compatible Top Notch series toolholders.

This insert is suited to production and job-shop threading applications on ferrous and non-ferrous materials where a 60-degree partial profile is required. It handles both internal threading, such as tapped bores and threaded features machined on a turning center, and external threading on shafts and fastener profiles. The uncoated K68 carbide is a practical choice for applications where coating is not required or where a sharp, uncoated edge provides better results on softer or gummy materials. Insert size 3 fits standard Top Notch series NT toolholders.

Key Features

• Carbide K68 grade substrate with bright, uncoated finish for sharp, consistent thread form
• Partial profile 60-degree thread form handles a broad pitch range without regrinding
• Left-hand configuration for left-hand threading operations
• Covers external pitches from 1.25 to 4.00 mm (6 to 20 TPI) and internal pitches from 2.00 to 5.00 mm (5 to 12 TPI)
• Corner radius of 0.17 mm (0.0067 inches) provides precise thread root geometry
• Part of the Top Notch series for use with compatible NT-style toolholders

Compatibility

Designed for use with Top Notch series NT-style threading toolholders that accept an Insert Size 3 seat. Verify toolholder hand designation matches the left-hand orientation of this insert before installation.

Installation Notes

This insert is installed and changed by a qualified machinist or CNC operator. Power down or place the machine in a safe lockout state before seating or removing any insert. Use the appropriate torx or clamp-screw driver specified by the toolholder manufacturer and do not overtighten the clamping screw. Confirm insert hand, pitch range, and thread standard match the job requirements before beginning the threading pass.