Tungaloy 6818115 Pcbn Turning Insert 4QP-DNGA432 BXC50

Product Description

The TUNGALOY 6818115 is a Polycrystalline Cubic Boron Nitride (PCBN) turning insert in the 4QP-DNGA432 series, grade BXC50, designed for high-performance machining of hard materials. The insert features a 55-degree diamond shape with a neutral hand, negative rake angle, and a honed cutting edge for consistent performance on hardened steels, cast irons, and similar difficult-to-machine workpieces. With a TiN PVD coating and coarse-grain PCBN substrate, it delivers wear resistance and thermal stability at elevated cutting speeds. This insert is installed and managed by CNC machinists and tool crib technicians in production turning environments.

The 6818115 is suited for turning, facing, boring, back turning, and back boring operations on hard materials (ISO material group H). Its 4-cutting-edge configuration and multi-tipped design maximize usable tool life per insert, making it a practical choice for high-volume production cells running hardened components. The flat-top chip breaker geometry and honed edge prep support stable, predictable cuts in interrupted and continuous hard-turning applications.

Key Features

• PCBN insert grade BXC50 with coarse-grain substrate for hard material (ISO group H) machining
• TiN PVD coating for enhanced surface wear resistance
• 55-degree diamond insert shape (DNGA style) with 4 cutting edges for extended tool life
• 0.0315 inch corner radius for controlled surface finish on tight-tolerance parts
• Honed cutting edge and flat-top chip breaker for stable chip control
• Multi-use capability: turning, facing, boring, back turning, and back boring
• Held by clamp and pin for rigid, repeatable seating in compatible toolholders

Compatibility

Designed for use in DNGA-style toolholders compatible with the 4QP-DNGA432 insert size code (size code 432). Conforms to ANSI and ISO standards for insert geometry and tolerancing (tolerance code G, clearance code N).

Installation Notes

Insert seating and clamping should be performed by a qualified CNC machinist or toolroom technician. Ensure the toolholder pocket and clamp pin are clean and free of chips before seating the insert. Verify the clamp and pin holding method is properly torqued per the toolholder manufacturer specifications. Inspect the cutting edge under magnification before use to confirm the honed edge is intact and undamaged.