Tungaloy 6817952 Pcbn Turning Insert Diamond 55 BX380

Product Description

The TUNGALOY 6817952 is a Polycrystalline Cubic Boron Nitride (PCBN) turning insert engineered for high-speed machining of hard materials. Carrying ISO designation DNGA 431, this insert features a 55-degree diamond shape, a 1/2-inch inscribed circle, and a negative rake geometry with a flat-top chip breaker. The BX380 coarse-grain PCBN grade is applied uncoated, delivering thermal stability and edge integrity in demanding turning applications. With two cutting edges and a honed cutting edge style, it provides consistent performance across multiple uses. Machinists and CNC operators working in production environments install this insert in compatible toolholders for precision finishing and semi-finishing passes.

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, chilled cast iron, and similar abrasion-resistant alloys. The DNGA geometry and neutral hand orientation allow flexible deployment in both right-hand and left-hand setups. The 2QP Mini-Tip series profile makes it particularly effective in applications where a compact tip geometry is required to reach tight features or maintain close tolerances in hard-part turning operations.

Key Features

• PCBN insert grade BX380, coarse grain, uncoated -- optimized for hard material (ISO group H) machining
• 55-degree diamond insert shape (DNGA) with negative rake and 0-degree relief angle for maximum edge support
• Honed cutting edge style reduces micro-chipping during hard-part turning
• Multi-use insert with 2 cutting edges; compatible with clamp and pin holding methods
• Flat-top chip breaker geometry suits finishing and semi-finishing passes
• Compliant with ANSI and ISO insert standards; ISO code DNGA 431

Compatibility

Designed for use in toolholders accepting DNGA-style inserts with a 1/2-inch inscribed circle and clamp or pin holding. Consult the TUNGALOY 2QP-DNGA series toolholder specifications to confirm pocket geometry and clamping compatibility before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or indexing the insert. Ensure the insert pocket and seating surface are clean and free of chips before clamping. Do not exceed the maximum depth of cut specified for this insert geometry, as PCBN inserts are brittle and susceptible to fracture under interrupted cuts or excessive radial loads without proper setup confirmation.