Sumitomo 16GCAUW Pcbn Turning Insert BN350 55 Degree Diamond

Product Description

The SUMITOMO 16GCAUW is a polycrystalline cubic boron nitride (PCBN) turning insert manufactured to ANSI code 2NUDNGA432 and ISO code 2NU-DNGA150408. It carries a BN350 manufacturer grade and is supplied in an uncoated finish. The insert features a 55-degree diamond shape (Shape Code D) with a 0.5 inch inscribed circle and a 1/32 inch (0.0313 inch) corner radius. Insert thickness is 3/16 inch (0.1875 inch). With two cutting edges and a clamp-and-pin holding method, this insert is designed for precision hard turning operations performed by machining professionals in production and job-shop environments.

The 16GCAUW is intended for turning hardened steel workpieces (Primary Workpiece Material Code H), where PCBN tooling outperforms carbide in hardness, wear resistance, and thermal stability at elevated cutting speeds. The 2NU-DNGA insert style, combined with a 0-degree relief angle (Clearance Code N) and G tolerance, makes this insert well suited for finish and semi-finish turning of hardened ferrous components. It is applicable to CNC lathes and turning centers used in automotive, bearing, die, and mold component production. The chip breaker designation is A and the insert carries C2 material grade classification.

Key Features

• Polycrystalline cubic boron nitride (PCBN) insert material for hard-turning applications
• BN350 grade, uncoated finish for direct engagement on hardened steel
• 55-degree diamond insert shape with 0.5 inch inscribed circle for precise cutting geometry
• 1/32 inch corner radius for controlled surface finish on hardened ferrous parts
• Two cutting edges with clamp-and-pin holding method for secure, repeatable seating
• Conforms to ANSI and ISO 13399 standards for broad toolholder compatibility

Compatibility

Designed for use in toolholders that accept DNGA-style inserts with a 0.5 inch inscribed circle and clamp-and-pin retention. Verify ANSI code 2NUDNGA432 and ISO code 2NU-DNGA150408 against toolholder specifications before installation. No specific compatible toolholder model numbers were provided in the product data.

Installation Notes

Installation should be performed by qualified machinists or tooling technicians familiar with indexable insert toolholders. Power down and lock out the machine before seating or indexing the insert. Ensure the toolholder pocket and clamping surfaces are clean and free of chips before placing the insert. Do not exceed the toolholder manufacturer's recommended clamping torque specifications for DNGA-style inserts.