Sumitomo 19P7394 Turning Insert SPMN422 AC8025P Carbide

Product Description

The SUMITOMO 19P7394 is a solid carbide turning insert in the SPMN422 style, grade AC8025P, designed for single-point turning operations on CNC lathes and turning centers. The insert features a square shape (S code) with a 90-degree included angle, a 0.5-inch inscribed circle, and a 1/32-inch (0.0313 inch) corner radius. The AC8025P grade incorporates a CVD coating applied over a carbide substrate, providing wear resistance suited for steel cutting applications. The clearance code is P and the tolerance code is M, consistent with ANSI and ISO 13399 standards. This insert is held by clamping and carries a positive rake geometry for reduced cutting forces.

The 19P7394 is intended for turning steel workpieces (ISO material code P) in production environments where consistent tool life and dimensional accuracy are required. Typical applications include external turning, facing, and profiling passes on ferrous materials in both roughing and semi-finishing contexts. The SC series designation and SPMN insert style make this insert appropriate for use in compatible SPMN-style toolholders operating at standard CNC lathe cutting parameters for steel.

Key Features

• AC8025P CVD-coated carbide grade optimized for steel (ISO P) turning
• Square insert shape with 90-degree included angle and positive rake geometry
• 0.5-inch inscribed circle and 0.5-inch insert length for consistent depth-of-cut capacity
• 1/32-inch (0.0313 inch) corner radius for general-purpose profiling and facing
• 11-degree relief angle (clearance code P) reduces flank wear contact
• Conforms to ANSI and ISO 13399 standards for insert identification and interchangeability

Compatibility

Designed for use in SPMN-style clamping toolholders that accept a 0.5-inch inscribed circle square insert. Confirm toolholder seat geometry, insert thickness (0.125 inch), and clearance angle requirements before installation.

Installation Notes

Carbide turning inserts are installed and indexed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before changing inserts. Use the correct torque screwdriver or clamping key specified by the toolholder manufacturer to secure the insert clamp — do not over-tighten or substitute fasteners. Inspect the toolholder seat and clamp for damage or debris before seating the new insert.