Sumitomo 16GBCHE Turning Insert DNGA432 BNC300 Pcbn

Product Description

The SUMITOMO 16GBCHE is a polycrystalline cubic boron nitride (PCBN) turning insert designed for precision machining of hardened steel. Coated with titanium nitride (TiN) via a PVD process, this insert carries a BNC300 grade designation and conforms to ANSI insert code DNGA432 and ISO insert code DNGA150408. The 55-degree diamond (rhombic) shape provides a sharp, durable cutting geometry suited to high-hardness applications. With four cutting edges and a negative side clearance, the insert delivers consistent tool life in demanding finish-turning operations. It is installed by machinists and CNC tooling technicians working on hardened ferrous components.

This insert is intended for turning hardened steel workpieces, classified under ISO material code H. It fits standard DNGA-style toolholders that accept a 1/2-inch inscribed circle insert with clamp and pin holding. Typical applications include finish and semi-finish turning of through-hardened or case-hardened components such as bearing races, shafts, and tooling steel parts. The ANSI size code is 432 and the ISO size code is 150408, which are the standard references used when cross-referencing compatible toolholder bodies and insert pockets.

Key Features

• PCBN insert material with TiN PVD coating for extended tool life on hardened steel
• BNC300 manufacturer grade optimized for ISO material group H workpieces
• 55-degree diamond (rhombic) insert shape - ANSI style DNGA, insert shape code D
• Four cutting edges with negative side clearance for rigid, stable clamping
• 1/32-inch corner radius (0.0313 inches) for controlled surface finish
• Conforms to ANSI and ISO 13399 standards for tooling data interoperability

Compatibility

Designed for use in DNGA-style toolholders accepting a 1/2-inch inscribed circle insert with clamp and pin holding. Compatible with toolholder pockets referencing ANSI insert code DNGA432 or ISO insert code DNGA150408.

Installation Notes

Installation is performed by qualified CNC machining technicians or toolroom personnel. Power down and lock out the machine spindle before seating or replacing the insert. Ensure the insert pocket and seating surfaces are clean and free of debris before clamping to maintain accurate positioning. PCBN inserts are brittle - avoid impact or prying against the cutting edge during handling or installation.