Kennametal 1712559 Threading Insert 24 Tpi Un Carbide

Product Description

The KENNAMETAL 1712559 is a laydown threading insert designed for internal UN thread cutting on CNC lathes and turning centers. Manufactured from solid carbide with a PVD-applied TiAlN coating, it carries the KC5025 grade designation and is ground to an NR insert style. The insert produces right-hand internal threads at 24 TPI and is sized at a 1/4-inch (6.35 mm) inscribed circle with a thickness of 0.1260 inches (3.04 mm). It is intended for use by machinists and CNC operators working in production threading applications where consistent thread form and tool life are required.

This insert is suited for threading steel, stainless steel, cast iron, superalloys, and titanium on production turning equipment. The CB chipbreaker geometry supports internal threading passes where chip control is critical to avoid damage to the bore or workpiece finish. Typical applications include threading hydraulic fittings, fastener bores, and precision machined components requiring UNC thread forms. The manufacturer catalog number for this insert is LT11NR24UNCB, and it corresponds to ISO code LT22NR5BUT1.

Key Features

• Solid carbide construction with PVD TiAlN coating for wear resistance across a broad range of workpiece materials
• KC5025 grade optimized for steel, stainless steel, cast iron, superalloys, and titanium threading
• NR insert style with CB chipbreaker geometry for controlled chip evacuation in internal threading
• Right-hand cutting orientation for standard internal UN thread production at 24 TPI
• 1/4-inch inscribed circle with a 0.1280-inch hole diameter for precise toolholder registration
• PVD coating process preserves edge sharpness and maintains dimensional accuracy on thread flanks

Compatibility

Designed for use in toolholders accepting LT11 NR-style laydown threading inserts with a 1/4-inch inscribed circle. Confirm toolholder seat geometry and insert pocket dimensions before installation to ensure proper seating and thread form accuracy.

Installation Notes

Threading inserts of this type are installed and indexed by qualified machinists or CNC operators. Power down and lock out the machine spindle before changing inserts. Use the correct torque driver or hex key specified by the toolholder manufacturer for the clamping screw — do not over-tighten, as this can fracture the carbide. Verify insert seating, thread pitch, and toolholder alignment with a thread gauge before running production parts.