Seco 00077784 Threading Insert 1.75mm Iso External CP500

Product Description

The SECO 00077784 is a laydown threading insert designed for external ISO thread cutting on CNC lathes and turning centers. Manufactured from solid carbide in the CP500 grade with a micrograin substrate, this insert carries a PVD-applied TiAlN/TiN coating engineered for extended tool life on difficult-to-machine materials. The 16ER insert style is configured for right-hand external threading at a 1.75 mm pitch with a 60-degree included angle. The A2 chipbreaker geometry promotes controlled chip evacuation during threading passes. With an inscribed circle of 0.3750 inches and a thickness of 0.1366 inches, it fits standard 16ER toolholders. Installed by machinists and CNC operators in production and job-shop environments.

This insert is suited for threading stainless steel workpieces (ISO material grade M) in both production and short-run turning applications. The Snap Tap series designation indicates it is intended for single-point threading operations where consistent thread form and surface finish are required. Typical use cases include threading hydraulic fittings, fasteners, and fluid-system components from stainless stock. The CP500 grade with PVD coating provides the wear resistance and edge stability needed for the work-hardening tendencies common to austenitic stainless grades.

Key Features

• Solid carbide micrograin substrate with CP500 manufacturer grade for high edge toughness
• PVD-applied TiAlN/TiN coating for wear resistance and reduced built-up edge on stainless steel
• 1.75 mm pitch, 60-degree included angle for ISO external thread profiles
• Right-hand cutting orientation, 16ER insert style for standard toolholder compatibility
• A2 chipbreaker geometry for controlled chip flow during threading passes
• Inscribed circle of 0.3750 inches; thickness of 0.1366 inches for precise seating in 16ER pockets

Compatibility

Designed as an OEM-style replacement threading insert for standard 16ER toolholders accepting laydown-style inserts with a 3/8-inch inscribed circle.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the turret is indexed away from the work zone before swapping inserts. Seat the insert firmly in the toolholder pocket and verify clamp torque per the toolholder manufacturer specification before resuming cuts. Minimum order quantity for this item is 2 pieces; each package ships with 1 insert.