Seco 00075897 Threading Insert 26NR CP300 4.5-2.5 Tpi

Product Description

The SECO 00075897 is a laydown threading insert engineered for right-hand internal partial profile threading operations on steel workpieces. Built from solid carbide and finished with a PVD-applied TiAlN/TiN coating, this insert delivers wear resistance and thermal stability across a working pitch range of 5.50 to 10.00 mm, corresponding to 4.5 to 2.5 TPI. It carries a 60-degree included angle and a 15.88 mm inscribed circle, fitting the Snap Tap series insert system. Licensed machinists and tool-and-die professionals install this insert in CNC lathes and threading toolholders configured for internal threading applications. Manufacturer grade is CP300.

This insert is suited for internal threading of steel components in precision machining environments, including production turning centers and manual lathes equipped with compatible Snap Tap series toolholders. The 26NR insert style targets partial-profile internal thread forms where the thread root geometry is controlled by the workpiece bore rather than the insert tip. Typical applications include threading hydraulic fittings, valve bodies, pipe couplings, and similar steel components requiring ISO-standard thread forms at coarser pitches.

Key Features

• Solid carbide substrate with PVD TiAlN/TiN coating for extended tool life on steel
• Right-hand internal partial profile, 60-degree included angle thread form
• Working range of 4.5 to 2.5 TPI (5.50 to 10.00 mm pitch) for coarse threading
• 15.88 mm inscribed circle with 0.3102 inch thickness for secure seating in Snap Tap holders
• ISO-standard geometry; primary workpiece material code P (steel)
• CP300 manufacturer grade optimized for coated carbide threading performance

Compatibility

Designed as an OEM-style replacement insert for Snap Tap series internal threading toolholders accepting 26NR-style laydown inserts. Verify holder seat geometry and insert size code 26 compatibility before installation.

Installation Notes

Laydown threading inserts of this type are installed and indexed by qualified machinists following the toolholder manufacturer torque and clamping guidelines. Power down and lock out the spindle before changing inserts. Handle solid carbide inserts with care to avoid chipping on cutting edges. Confirm correct insert orientation for right-hand internal threading before engaging the workpiece.