Seco 00077938 Threading Insert 55 Degree Solid Carbide CP500

Product Description

The SECO 00077938 is a laydown threading insert designed for external thread cutting in turning and threading operations. Part of the Snap Tap series, this insert features a solid carbide substrate in the CP500 grade with a PVD-applied TiAlN/TiN coating for extended tool life across a broad range of workpiece materials. It covers a 55-degree included angle with a partial profile geometry, making it suitable for cutting multiple thread forms within a single tool. The A2 chipbreaker and right-hand orientation suit standard external threading setups on CNC lathes and manual threading machines.

This insert is rated for universal workpiece material compatibility, including ISO material groups K, M, P, and S, covering cast iron, stainless steel, steel, and high-temperature alloys. The pitch range spans 0.50 to 3.00 mm, corresponding to a threads-per-inch range of 48 to 8 TPI. Typical installation scenarios include production threading on CNC turning centers where consistent thread form accuracy and coating durability under interrupted or continuous cuts are required.

Key Features

• Solid carbide substrate in CP500 micrograin grade for rigidity and wear resistance
• PVD TiAlN/TiN coating applied via physical vapor deposition for thermal protection and reduced friction
• 55-degree included angle, right-hand external partial profile covers multiple thread standards under ISO
• Pitch range of 0.50 to 3.00 mm (8 to 48 TPI) for versatile thread cutting without insert changes
• A2 chipbreaker geometry for controlled chip evacuation during threading passes
• 3/8 inch inscribed circle with 0.0030 inch corner radius for precise thread root geometry

Compatibility

Designed as an OEM-style replacement or direct-use insert for toolholders accepting 16ER-style laydown threading inserts with a 3/8 inch inscribed circle and 0.1366 inch thickness, conforming to ISO threading insert standards.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before seating or replacing inserts. Ensure the toolholder pocket and clamping screw are clean and free of chips before installing the insert to prevent seating errors. Follow the toolholder manufacturer torque specifications for the clamping screw; do not overtighten, as carbide inserts are brittle and can fracture under uneven clamping load.