Sumitomo 16FSW3J Pcbn Turning Insert 1/4 in Ic Tpg

Product Description

The SUMITOMO 16FSW3J is a triangular Polycrystalline Cubic Boron Nitride (PCBN) turning insert designed for high-performance single-point turning operations on difficult-to-machine materials. Manufactured to ANSI code 3NUTPGA222 and ISO code 3NU-TPGW110308, this uncoated insert features a neutral hand orientation, a positive rake geometry, and a 1/4-inch inscribed circle. The 60-degree included angle and 1/32-inch corner radius make it well-suited for precision material removal on hardened and abrasive workpiece materials. It is held in place by a screw-lock clamping system and belongs to the TPG series.

This insert is intended for turning applications involving cast iron, hardened steel, and superalloys. The PCBN substrate provides the hardness and thermal stability needed to maintain cutting-edge integrity at elevated temperatures typical of hard turning and interrupted cuts in production environments. It is used in CNC turning centers and manual lathes by machinists and tooling technicians working in aerospace, automotive, and heavy manufacturing. The maximum depth of cut is 0.0150 inches, making it appropriate for finish and semi-finish turning passes rather than heavy stock removal.

Key Features

• Polycrystalline Cubic Boron Nitride (PCBN) substrate for hard-turning and superalloy applications
• Uncoated grade BN700 for consistent edge sharpness without coating buildup
• Positive rake geometry reduces cutting forces and heat generation at the tool-workpiece interface
• 3 usable cutting edges per insert for extended tool life and lower cost per edge
• Screw-lock insert holding method provides secure, repeatable seating in compatible toolholders
• Conforms to ANSI and ISO 13399 standards for interchangeability and documentation compatibility

Compatibility

Designed for use in screw-lock TPG-style toolholders accepting a triangular insert with a 1/4-inch inscribed circle and 11-degree relief angle. Verified primary workpiece materials include cast iron, hardened steel, and superalloys per ANSI material codes H, K, and S.

Installation Notes

Installation and indexing should be performed by a qualified machinist or tooling technician with the machine powered down and spindle locked. Ensure the toolholder pocket and seating surfaces are clean and free of chips before seating the insert. Use the appropriate torque driver for the screw-lock fastener per the toolholder manufacturer guidelines — do not overtighten. Confirm insert index position and tool offset before returning the machine to operation.