Tungaloy 6782045 Pcbn Turning Insert Diamond 55 BXA20

Product Description

The TUNGALOY 6782045 is a Polycrystalline Cubic Boron Nitride (PCBN) turning insert in the 2QP-DNGA series, designed for high-hardness machining applications. This multi-tipped insert features a 55-degree diamond shape (DNGA style), a 0.5-inch inscribed circle, and a 0.0157-inch corner radius. The manufacturer grade is BXA20, and the insert carries a multilayer TiAlN PVD coating over a medium-grain PCBN substrate. It is intended for use in CNC turning centers and is typically installed and indexed by licensed machinists or toolroom professionals working with hard materials.

This insert is suited for turning, facing, boring, back turning, and back boring operations on hard workpiece materials (ISO material group H), including hardened steels and hard cast irons. The negative rake geometry and honed cutting edge provide controlled chip action and edge stability at elevated cutting temperatures typical in hard-part turning. The flat-top chip breaker and two available cutting edges make it a practical choice for production turning on automated or manual CNC lathes where consistent surface finish on hard materials is required.

Key Features

• PCBN insert with multilayer TiAlN PVD coating for hard-material turning resistance
• 55-degree diamond insert shape (DNGA style) with negative rake and honed cutting edge
• 0.5-inch inscribed circle with 0.0157-inch corner radius for controlled depth of cut
• Multi-use application: turning, facing, boring, back turning, and back boring
• Two cutting edges per insert; clamp and pin holding method
• Meets ANSI and ISO standards; ISO code 2QP-DNGA150404 BXA20

Compatibility

Designed as an OEM-style replacement or direct-fit insert for toolholders accepting DNGA-style inserts with a 0.5-inch inscribed circle and clamp or pin holding. Verify toolholder seat geometry and pocket dimensions before installation.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the CNC machine before indexing or replacing inserts. Use the correct torque on clamp screws per the toolholder manufacturer's specification - do not over-tighten, as this can chip the PCBN tip. Maximum depth of cut is 0.0197 inches; do not exceed this value to avoid premature edge failure on hardened workpieces.