Seco 00050278 Laydown Threading Insert 16NL CP500

Product Description

The SECO 00050278 is a laydown threading insert designed for cutting internal UN threads in a wide range of workpiece materials. Built from solid carbide micrograin substrate in the CP500 grade, it carries a PVD-applied TiAlN/TiN coating for wear resistance and extended tool life at the cutting edge. The insert is configured for left-hand internal threading at 12 threads per inch with a 60-degree included angle. With an inscribed circle of 0.375 inches and a thickness of 0.1366 inches, it fits standard 16NL toolholders. Licensed machinists, CNC programmers, and toolroom technicians select this insert for precision threading operations on lathes and machining centers.

This insert is suited for internal thread turning on a broad spectrum of materials, including cast irons, steels, stainless steels, high-temperature alloys, and non-ferrous metals, consistent with its universal workpiece material rating. It performs in both production and job-shop environments where consistent thread form and finish are required. The 16NL insert style seats in compatible laydown threading toolholders designed for the 16NL footprint. The Snap Tap series designation identifies the insert family within the SECO threading product line.

Key Features

• Solid carbide micrograin substrate in SECO CP500 grade for toughness and wear resistance
• PVD TiAlN/TiN coating extends cutting edge life across diverse materials
• Left-hand internal UN thread form at 12 TPI with 60-degree included angle
• 3/8 inch (0.375 inch) inscribed circle, 0.1366 inch thickness — fits 16NL toolholders
• ISO-standard insert geometry; compatible with universal workpiece material groups K, M, N, P, and S
• Snap Tap series design for reliable, repeatable seating in laydown threading setups

Compatibility

Designed for use in 16NL-style laydown threading toolholders. Compatible with workpiece material groups K, M, N, P, and S as defined by ISO classification standards.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Power down and lock out the machine spindle before changing inserts. Seat the insert firmly against the pocket locating surfaces and torque the clamping screw according to the toolholder manufacturer's specification. Inspect the insert seat and clamp for debris or wear before each insert change to maintain thread-form accuracy.