Sumitomo 12RJ711 TPG321 AC820P Carbide Turning Insert

Product Description

The SUMITOMO 12RJ711 is a solid carbide turning insert designed for precision single-point turning operations on CNC and manual lathes. Conforming to ANSI code TPG321 and ISO code TPGN160304, it features a 60-degree triangular insert shape with a positive rake geometry and an 11-degree relief angle. The AC820P manufacturer grade indicates a CVD-coated carbide substrate engineered for wear resistance and thermal stability at elevated cutting speeds. With a 3/8-inch inscribed circle, a 1/64-inch corner radius, and an insert thickness of 1/8 inch, this insert is suited for moderate to finishing-depth passes. Machining professionals select this insert for consistent edge life when turning steel and stainless workpieces.

The 12RJ711 is intended for turning steel and stainless steel workpieces, corresponding to primary workpiece material codes M and P. It is clamp-held in standard TPG-style toolholders with a clearance code P and tolerance code G. Typical applications include finishing and semi-finishing passes on CNC turning centers and turret lathes in production and job-shop environments. The TP series geometry suits scenarios where controlled chip formation and predictable edge life are priorities on ferrous materials.

Key Features

• CVD-coated AC820P grade solid carbide for thermal stability and wear resistance on steel
• 60-degree triangular shape with positive rake for reduced cutting forces
• 11-degree relief angle (clearance code P) for clearance in standard TPG toolholders
• 1/64-inch corner radius for semi-finishing and finishing cut profiles
• Compliant with ANSI and ISO 13399 standards for toolholder interchangeability
• Single cutting edge per insert for predictable performance tracking

Compatibility

Designed as a direct-fit replacement for standard TPG321-style clamp-held toolholders conforming to ANSI TPG and ISO TPGN insert seat specifications. Compatible material grades include C5A, C6, C7, and C8 classifications.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the machine in a fully stopped and locked-out state before any insert change. Seat the insert squarely against the pocket locating surfaces before tightening the clamp to avoid micro-fracture at the cutting edge. Inspect the toolholder pocket for wear or debris before seating a new insert. Follow the toolholder manufacturer torque and clamping specifications for the specific clamp style in use.