Kennametal 4109945 Threading Insert NT3R KCU25 Carbide

Product Description

The KENNAMETAL 4109945 is a carbide threading insert in the NT3R style, engineered for precision thread-cutting operations on CNC lathes and turning centers. Manufactured in the KCU25 grade, this insert handles external thread pitches from 1.25 to 4.00 mm and 6 to 20 TPI, and internal pitches from 2.00 to 5.00 mm and 5 to 12 TPI. The carbide substrate provides the hardness and thermal resistance needed to maintain accurate thread form at production cutting speeds. Machinists and CNC operators working in job shops, production turning, and maintenance machining environments rely on this insert for consistent thread profiles in steel and similar materials.

This threading insert is suited for both internal and external threading applications on manual and CNC turning equipment. It fits standard NT-style threading toolholders commonly used in production and job shop settings. The pitch range makes it a versatile choice for metric and inch thread forms across a broad range of fastener and component applications. It is sold individually per package, with a minimum order quantity of 5 units.

Key Features

• NT3R insert style for compatibility with standard NT threading toolholders
• KCU25 carbide grade for wear resistance and edge stability in threading operations
• External pitch range: 1.25 to 4.00 mm and 6 to 20 TPI
• Internal pitch range: 2.00 to 5.00 mm and 5 to 12 TPI
• Carbide construction for consistent thread form at production cutting speeds

Compatibility

Designed for use in NT-style threading toolholders suited for external and internal threading operations across the stated pitch ranges. Confirm toolholder style and pitch requirements before ordering.

Installation Notes

Installation is performed by qualified machinists or CNC operators with the machine powered down and spindle locked before insert exchange. Seat the insert fully in the toolholder pocket and torque the clamp screw according to the toolholder manufacturer specifications. Inspect the insert seating and cutting edge condition before resuming operations. Follow applicable shop safety procedures when handling carbide inserts, as edges are sharp.