Sumitomo 19RBW9K Turning Insert Tcmt AC830P Solid Carbide

Product Description

The SUMITOMO 19RBW9K is a solid carbide turning insert designed for precision metal cutting on CNC lathes and manual turning centers. It carries the ANSI code TCMT32.51ENK and ISO code TCMT16T304N-SK, placing it in the TC series of triangular inserts. The AC830P grade features a CVD coating over a solid carbide substrate, providing wear resistance and thermal stability during interrupted and continuous cuts. With a 3/8-inch inscribed circle, a 0.6496-inch insert length, and a 1/64-inch corner radius, this insert is suited for medium to light finishing passes where edge precision and surface finish matter. Licensed machinists and CNC operators install this insert on screw-clamped toolholders.

The 19RBW9K is intended for turning applications on stainless steels and carbon and alloy steels, corresponding to workpiece material codes M and P. The ENK chip breaker geometry supports positive-rake cutting with controlled chip flow, making it effective across a range of depths of cut and feed rates in both roughing and finishing contexts. It is applicable in general-purpose production environments handling universal secondary workpiece materials as well. The material grade designations C5, C5A, and C6 confirm suitability for steel and stainless turning at moderate to elevated cutting speeds.

Key Features

• CVD-coated AC830P grade solid carbide substrate for extended tool life on steel and stainless steel
• TCMT triangle insert shape with 60-degree included angle and positive rake for reduced cutting forces
• ENK chip breaker geometry for controlled chip evacuation across medium and light turning passes
• 1/64-inch (0.0156-inch) corner radius for accurate edge definition on finish contours
• Screw-clamped holding method compatible with standard TCMT-style toolholders
• Compliant with ANSI and ISO 13399 standards for insert identification and interchangeability

Compatibility

Designed as a direct-fit replacement for ANSI TCMT32.51ENK and ISO TCMT16T304N-SK inserts used in screw-clamped toolholders accepting TC-series triangular inserts with a 3/8-inch inscribed circle and 5/32-inch insert thickness.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before seating or indexing inserts. Use the correct torque wrench and manufacturer-specified clamp screws to secure the insert in the pocket — do not over-tighten or substitute hardware. Inspect the toolholder pocket and seating surface for chips or debris before installing a new insert edge.