Sumitomo 12JT712 Cermet Turning Insert TPG322 T1500A

Product Description

The SUMITOMO 12JT712 is a TPG-style cermet turning insert designed for precision metal cutting operations on CNC and manual lathes. Manufactured to the T1500A grade cermet specification, this insert features a 60-degree triangular shape with a 3/8 inch inscribed circle and a 1/32 inch (0.0313 inch) corner radius. The bright, uncoated cermet substrate delivers strong wear resistance and thermal stability, making it well suited for finishing and semi-finishing passes on steel workpieces. Insert thickness is 1/8 inch (0.1250 inch) and insert length is 0.4331 inch. Clamp-style holding and a positive rake geometry contribute to stable cutting performance and reduced cutting forces.

This insert is intended for steel turning applications in production and job-shop environments. The TPG322 form factor with clearance code P and tolerance code G meets ANSI and ISO 13399 standards, supporting use on standard triangular insert toolholders. Primary workpiece material is steel (ISO material code P). It is appropriate for turning, facing, and light profiling where a sharp, uncoated cermet edge provides surface finish and dimensional accuracy advantages. Licensed machinists and CNC operators are the typical end users.

Key Features

• T1500A cermet grade with bright uncoated finish for sharp edge retention on steel
• 60-degree triangular insert shape provides three usable cutting edges per insert
• Positive rake geometry reduces cutting forces and improves surface finish
• 3/8 inch inscribed circle and 1/32 inch corner radius for precision finishing operations
• Clamp-style holding method for secure, repeatable insert positioning
• Compliant with ANSI and ISO 13399 standards; ISO code TPGN160308

Compatibility

Designed as an OEM-style replacement cermet turning insert for standard TPG triangular insert toolholders accepting a 322 size insert with clamp-style holding and a positive rake seat.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician. Ensure the machine spindle is stopped and all motion is arrested before indexing or replacing inserts. Use the appropriate torque wrench and clamp hardware specified by the toolholder manufacturer when securing the insert. Inspect the toolholder pocket and clamp for wear or damage before seating a new insert.