Sumitomo 161NWCJ Pcbn Turning Insert 3/8 Inch Ic Diamond

Product Description

The SUMITOMO 161NWCJ is an uncoated polycrystalline cubic boron nitride (PCBN) turning insert designed for precision metal cutting on CNC lathes and turning centers. It carries the ANSI code 2NUDCGA32.51 and ISO code 2NU-DCGW11T304, confirming compliance with ANSI and ISO 13399 standards. The insert features a 55-degree diamond shape with a positive rake geometry and a 7-degree relief angle, producing a strong, sharp cutting edge suited for demanding interrupted and continuous cuts. Grade BN1000 PCBN material delivers the hardness and thermal stability required for high-speed turning without a coating. Machinists and tooling specialists install this insert into compatible screw-lock toolholders for DCG-series inserts.

This insert is engineered for turning hardened steel, cast iron, and superalloys — workpiece material codes H, K, and S. Typical applications include finish and semi-finish turning of hardened bearing races, brake rotors, camshafts, and turbine components where surface finish and dimensional accuracy are critical. The neutral hand orientation suits both left- and right-hand cut configurations depending on toolholder setup. With only 2 cutting edges and a 0.0156-inch corner radius, the 161NWCJ is oriented toward precision work at controlled depths rather than heavy stock removal.

Key Features

• PCBN grade BN1000 uncoated insert for hardened steel, cast iron, and superalloy turning
• 55-degree diamond insert shape (Shape Code D) with positive rake and 7-degree relief angle
• 3/8-inch (0.3750-inch) inscribed circle with 0.0156-inch (1/64-inch) corner radius
• Maximum depth of cut 0.0150 inches for precision finish and semi-finish passes
• Screw-lock holding method with clearance code C and tolerance code G
• Compliant with ANSI and ISO 13399 standards; chip breaker style A

Compatibility

Designed for use in screw-lock toolholders accepting DCG-series PCBN turning inserts with ANSI code 2NUDCGA32.51 and ISO code 2NU-DCGW11T304. Confirm toolholder pocket geometry and insert seat dimensions before installation.

Installation Notes

This insert is installed by qualified machinists or tooling technicians on CNC or manual turning equipment. Power down and lock out the machine spindle before changing inserts. Use the appropriate torx or hex key to seat the screw-lock fastener to toolholder manufacturer specification — do not overtighten. PCBN inserts are brittle; handle with care and avoid contact between cutting edges during storage and installation.