Sumitomo 16GCAUL Pcbn Turning Insert BN350 80 Diamond

Product Description

The SUMITOMO 16GCAUL is a Polycrystalline Cubic Boron Nitride (PCBN) turning insert designed for precision machining of hard materials. Carrying the BN350 manufacturer grade and an uncoated finish, this insert features an 80-degree diamond shape (ANSI code 2NUCNGA431) with a negative rake geometry. The inscribed circle measures 0.5 inches and the corner radius is 0.0156 inches (1/64 inch). Insert thickness is 0.1875 inches (3/16 inch). With 2 cutting edges and a clamp-and-pin holding method, this insert is built for stable, repeatable performance on hard-turning applications where surface finish and dimensional accuracy are critical.

This insert is suited for hard turning operations on ferrous and hardened materials, including hardened steels and similar hard workpiece materials coded H under standard classification. It is appropriate for use in CNC turning centers and lathe tooling systems that accept CNGA-style inserts. The 2NU-CNGA insert style and ISO code 2NU-CNGA120404 make it compatible with standard CNGA toolholders used in production and job-shop environments. Machinists and CNC operators working on close-tolerance, high-hardness components will find this insert suitable for finishing and semi-finishing passes.

Key Features

• PCBN insert material provides high hardness and thermal resistance for machining hard workpiece materials
• BN350 grade with uncoated finish for consistent cutting performance without coating delamination concerns
• 80-degree diamond insert shape (Shape Code C) allows versatile approach angles
• Negative rake geometry supports stable cutting forces on hardened materials
• 2 cutting edges extend usable insert life per unit
• Clamp and pin holding method ensures rigid seating in compatible toolholders

Compatibility

Designed as an OEM-style replacement or direct-fit insert for CNC turning toolholders accepting CNGA-style inserts conforming to ANSI and ISO 13399 standards.

Installation Notes

PCBN turning inserts are installed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and manufacturer-specified toolholder hardware when seating the clamp; do not overtighten by hand. Handle PCBN inserts with care, as the cutting edges are brittle and susceptible to chipping from impact or improper handling.