Tungaloy 6782056 Pcbn Turning Insert VCGW331 BXA20

Product Description

The TUNGALOY 6782056 is a polycrystalline cubic boron nitride (PCBN) turning insert in the VCGW style, designed for high-performance machining of hard materials. It carries grade BXA20 with a multilayer TiAlN PVD coating applied over a medium grain PCBN substrate. The insert features a 35-degree diamond shape, a 3/8 inch inscribed circle, and a 0.016 inch corner radius. With a positive rake geometry and honed cutting edge, it is built for precision turning, facing, and boring operations where surface finish and tool life on hardened workpieces are the primary concerns. Installation is performed by licensed machinists and CNC toolroom technicians.

This insert is suited for turning hard materials including hardened steels and similar ferrous alloys that fall within the H workpiece material classification. Its flat-top chipbreaker geometry and 7-degree relief angle make it appropriate for applications including turning, facing, boring, back turning, and back boring. The screw-holding method provides rigid clamping in compatible VCGW-style toolholders. The neutral hand orientation allows use in a broad range of toolholder configurations without handedness restrictions.

Key Features

• PCBN substrate with medium grain structure for hardened material cutting
• Multilayer TiAlN PVD coating (grade BXA20) for thermal resistance and wear life
• 35-degree diamond insert shape (VCGW style) with 7-degree relief angle and positive rake
• Honed cutting edge for improved edge integrity on hard workpiece materials
• Multi-tipped, 2-cutting-edge design maximizes insert utilization
• Screw-mounted, neutral hand - compatible with turning, facing, boring, back turning, and back boring setups

Compatibility

Designed for use in VCGW-style screw-clamp toolholders accepting a 3/8 inch inscribed circle, 35-degree diamond insert. Conforms to ANSI and ISO standards; ISO code 2QP-VCGW160404 BXA20, industry standard number 2QP-VCGW 331.

Installation Notes

Insert replacement and toolholder setup should be performed by qualified machining technicians following machine-specific lockout and energy isolation procedures before any insert change. Use the appropriate torque wrench and screw size specified by the toolholder manufacturer when seating the clamping screw. Inspect the toolholder pocket and seating surfaces for wear or debris before installing a new insert. Do not exceed the maximum depth of cut specification for this insert geometry.