Kennametal 1114259 Threading Insert NTK3L KC730 Carbide

Product Description

The KENNAMETAL 1114259 is a carbide threading insert in the Top Notch series, designed for precision thread cutting on both internal and external profiles. Manufactured to a partial profile 60-degree included angle, this left-hand insert handles a broad pitch range - 0.60 to 2.50 mm (10 to 44 TPI) on external threads and 1.00 to 2.50 mm (9 to 24 TPI) on internal threads. The KC730 grade substrate receives a PVD-applied Titanium Nitride (TiN) finish, giving the cutting edge strong wear resistance and thermal stability suited to C2, C3, and C4 material grades. Machinists and toolroom technicians reach for this insert when threading steel, cast iron, and similar ferrous workpieces in production or job-shop environments.

The 1114259 fits Top Notch series toolholders configured for left-hand threading operations. It is applicable to both internal and external thread forms following the partial profile 60-degree thread standard, making it a versatile choice across unified, metric, and similar 60-degree thread families. Typical installation scenarios include CNC lathe and manual lathe threading cycles where consistent thread form and insert repeatability are required across multiple parts. The insert size is 3, with a thickness of 0.1949 inches (4.95 mm) and a tip-to-top-of-insert height of 0.1409 inches (3.58 mm).

Key Features

• KC730 carbide grade with PVD Titanium Nitride coating for extended tool life on ferrous materials
• Partial profile 60-degree included angle covers a wide pitch range: 0.60 to 2.50 mm external, 1.00 to 2.50 mm internal
• Left-hand insert geometry for left-hand threading applications in Top Notch toolholders
• Suitable for C2, C3, and C4 material grades including steel and cast iron
• Corner radius of 0.0031 inches (0.08 mm) for precise thread root definition
• Top Notch series design for secure, repeatable insert seating and quick indexing

Compatibility

Designed for use in Kennametal Top Notch series threading toolholders configured for NTK style, left-hand inserts. Thread type compatibility includes both internal and external partial profile 60-degree forms across the stated pitch ranges.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians familiar with indexable insert threading systems. Disengage machine power and ensure the spindle is fully stopped before seating or removing inserts. Use the correct Top Notch clamping hardware and follow the toolholder manufacturer torque guidance for insert retention screws. Inspect the insert pocket for chips or debris before each insert change to ensure proper seating and thread accuracy.