Sumitomo 19P7AFI Turning Insert CNMG432EMU AC8025P Carbide

Product Description

The SUMITOMO 19P7AFI is a CNMG-style turning insert designed for single-point turning operations on CNC and manual lathes. Manufactured from solid carbide with a CVD coating in the AC8025P grade, this insert is engineered primarily for cutting steel. It features a diamond (80-degree) insert shape, a neutral hand orientation, and a negative rake geometry. The inscribed circle measures 0.5 inches, insert length is 0.5079 inches, thickness is 0.1875 inches, and the corner radius is 0.0312 inches. The EMU chip breaker geometry supports controlled chip evacuation during turning passes. Licensed machinists and CNC operators install this insert in compatible CNMG toolholders as part of standard lathe setups.

This insert is suited for external and internal turning applications on steel workpieces in both roughing and semi-finishing operations. The AC8025P carbide grade with CVD coating provides wear resistance and thermal stability under continuous and interrupted cuts. It carries ANSI code CNMG432EMU and ISO code CNMG120408N-MU, making it straightforward to cross-reference against toolholder specifications. The insert is held by clamp and pin methods, which is standard for CNMG-style seats in most indexable turning systems.

Key Features

• AC8025P CVD-coated solid carbide grade optimized for steel turning
• 80-degree diamond insert shape with CNMG geometry and neutral hand
• EMU chip breaker for controlled chip formation during turning
• Negative rake, N clearance, M tolerance per ANSI and ISO 13399 standards
• Corner radius of 0.0312 inches suits general-purpose finishing and semi-finishing passes
• Compatible with clamp and pin holding methods standard to CNMG toolholders

Compatibility

Designed for use in CNMG-style indexable turning toolholders that accept an insert with a 0.5-inch inscribed circle, 0.1875-inch thickness, and a 0.2031-inch hole diameter. Matches ANSI code CNMG432EMU and ISO code CNMG120408N-MU for toolholder cross-reference.

Installation Notes

Installation is performed by licensed machinists or CNC operators. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully in the toolholder pocket before tightening the clamp or pin to the toolholder manufacturer's specified procedure. Inspect the insert seat and clamp for chips or debris before securing the insert to ensure proper seating and tool-life performance.