Kennametal 1113813 Threading Insert NT3R KC850 Carbide

Product Description

The KENNAMETAL 1113813 is a carbide threading insert designed for precision thread-cutting operations on both internal and external threads. Manufactured in the NT3R style and running the KC850 grade substrate, this insert carries a CVD-applied TiC/TiCN/TiN multilayer coating that resists wear and heat during continuous threading passes. It covers a partial profile 60-degree thread form, handling 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). It is a right-hand insert belonging to the Top Notch series and is suited for CNC lathes and manual turning centers used in production threading applications.

This insert is used in metalworking environments where reliable, repeatable thread profiles are required across a range of pitch sizes. Typical applications include threading operations on steel, stainless, and cast iron workpieces classified under material grades C5 and C6. The Top Notch series toolholding system is the intended platform for this insert. Machinists and CNC operators in job shops, production facilities, and maintenance-repair-overhaul environments use this insert for both internal bore threading and external OD threading work.

Key Features

• KC850 carbide grade with CVD TiC/TiCN/TiN multilayer coating for extended tool life
• Partial profile 60-degree thread form covers both internal and external thread applications
• External pitch range: 1.25 to 4.00 mm (6 to 20 TPI)
• Internal pitch range: 2.00 to 5.00 mm (5 to 12 TPI)
• Right-hand cutting geometry, NT insert style, Insert Size 3
• Corner radius of 0.17 mm (0.0067 inches) for controlled thread root form

Compatibility

Designed for use with Top Notch series threading toolholders that accept NT-style inserts. Verify toolholder seat size and clamping compatibility before installation.

Installation Notes

Threading inserts of this type are seated and clamped by a qualified machinist or CNC operator following the toolholder manufacturer's seating and torque guidance. Ensure the machine spindle is fully stopped and all motion is locked out before changing inserts. Inspect the toolholder pocket for chips or wear before seating the new insert. Do not attempt to re-grind or modify the cutting edge on coated carbide threading inserts.