Sumitomo 16JYDSY Pcbn Turning Insert Triangle BN7000

Product Description

The SUMITOMO 16JYDSY is a polycrystalline cubic boron nitride (PCBN) turning insert designed for precision single-point turning operations on difficult-to-machine workpiece materials. Built to ANSI code 3NUTPGA221 and ISO code 3NU-TPGW110304, this insert features a triangular shape with a 60-degree included angle, providing three usable cutting edges per insert. The BN7000 manufacturer grade delivers the hardness and thermal stability required when cutting hardened steels, cast iron, and superalloys at elevated cutting speeds. Holding is via screw clamp, and the positive rake geometry helps reduce cutting forces and heat generation at the edge. Insert thickness is 0.125 inches and inscribed circle diameter is 0.25 inches.

This insert is suited for finish and semi-finish turning applications in aerospace, automotive, and general machining environments where conventional carbide tooling reaches its limits. Primary workpiece materials include cast iron, hard materials, and superalloys, making it a go-to choice for shops running hardened components or high-temperature alloy parts. The neutral hand designation means it fits standard right- or left-hand toolholders configured for TPG-style inserts. It is installed by licensed machinists and CNC operators in production and job-shop settings.

Key Features

• PCBN insert material provides extreme hardness for cutting cast iron, hard materials, and superalloys
• BN7000 grade with coated finish optimized for high-speed dry or near-dry turning
• Triangular insert shape (T) with 60-degree included angle yields three cutting edges per insert
• Positive rake geometry reduces cutting forces and edge temperature
• Screw-clamp holding method (clearance code P, tolerance code G) for secure, repeatable seating
• Conforms to ANSI and ISO 13399 standards for toolholder compatibility documentation

Compatibility

Designed as an OEM-style replacement or direct-fit insert for toolholders accepting TPG-series, screw-clamp triangular inserts with a 1/4-inch inscribed circle and 1/8-inch thickness per ANSI 3NUTPGA221 and ISO 3NU-TPGW110304 specifications.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct torx or hex key to torque the clamp screw to the toolholder specification - do not overtighten, as PCBN inserts are brittle and can fracture under excessive clamping force. Inspect the insert pocket and seating surfaces for chips or debris before installing a new insert.