Sumitomo 19RJCAY Turning Insert CNMG431EGE AC820P Carbide

Product Description

The SUMITOMO 19RJCAY is a solid carbide turning insert in the CNMG431EGE geometry, finished with an Al2O3 coating applied via CVD process. Rated to manufacturer grade AC820P, this insert features an 80-degree diamond shape, a neutral hand orientation, and a positive rake angle of 3 degrees. The inscribed circle measures 0.5 inches, the corner radius is 0.0156 inches (1/64 inch), and the insert length runs 0.5079 inches. It is designed for precision metal-removal operations on CNC and manual lathes, primarily targeting steel workpiece materials. Machinists and tool-room technicians are the primary installers.

This insert is suited for turning and facing operations on steel in both production and job-shop environments. The EGE chip breaker geometry supports controlled chip evacuation across a range of depths of cut and feed rates typical to steel turning. The AC820P grade with Al2O3 CVD coating is well-matched to general-purpose steel machining where heat resistance and edge wear are the primary concerns. This insert conforms to ANSI code CNMG431EGE and ISO code CNMG120404N-GE per ANSI and ISO 13399 standards, making cross-referencing to compatible toolholders straightforward.

Key Features

• AC820P manufacturer grade with Al2O3 CVD coating for heat and wear resistance in steel turning
• 80-degree diamond insert shape (Shape Code C) for versatile turning and facing approaches
• EGE chip breaker geometry designed for controlled chip formation in steel
• Neutral hand orientation compatible with a wide range of CNMG-style toolholders
• Positive rake angle (3 degrees) reduces cutting forces and heat generation at the edge
• Dual holding method: clamp and pin for secure seating in the insert pocket

Compatibility

Conforms to ANSI code CNMG431EGE and ISO code CNMG120404N-GE. Compatible with CNMG-style toolholders that accept a 0.2031-inch hole diameter, 0.5-inch inscribed circle, and 3/16-inch insert thickness. Secondary workpiece material code P designates suitability for steel.

Installation Notes

Installation is performed by qualified machinists or tool-room technicians. Ensure the machine spindle is fully stopped and locked out before indexing or replacing inserts. Seat the insert firmly in the pocket and verify clamp and pin engagement before resuming any cutting operation. Inspect the insert pocket and seating surfaces for debris or damage that could affect insert stability and dimensional accuracy.