Sumitomo 12JT711 Cermet Turning Insert TPG321 T1500A

Product Description

The SUMITOMO 12JT711 is a TPG321-style cermet turning insert designed for precision metal cutting on CNC lathes and manual turning centers. Built to ANSI and ISO 13399 standards, it features a triangular insert shape with a 60-degree included angle, a 3/8-inch inscribed circle, and a 1/64-inch corner radius. The T1500A cermet grade delivers a balance of hardness and wear resistance suited to finishing and semi-finishing operations on steel workpieces. The insert carries a positive rake geometry and a P-clearance, G-tolerance classification, making it a consistent choice for achieving tight dimensional tolerances.

This insert is engineered primarily for steel cutting applications, corresponding to ISO material group P. It is well suited to light-to-medium turning passes where surface finish and dimensional accuracy are priorities. The uncoated cermet substrate performs at elevated cutting speeds with reduced built-up edge on ferrous materials. Licensed machinists and CNC operators working in job shops, production turning cells, and precision manufacturing environments will find this insert a direct fit for standard TPG-style toolholders that accept a 321 insert size.

Key Features

• TPG321 insert style with clamp-style holding method for secure seating in compatible toolholders
• T1500A cermet grade, uncoated, optimized for steel finishing and semi-finishing cuts
• 60-degree triangular shape provides three usable cutting edges per insert
• Positive rake geometry reduces cutting forces and heat generation at the tool-workpiece interface
• Meets ANSI and ISO 13399 standards for interchangeability and documentation
• ISO equivalent code TPGN160304 for cross-reference with metric tooling systems

Compatibility

Designed as an OEM-style replacement turning insert for standard TPG-style toolholders accepting a 321 insert size with a P-clearance, G-tolerance fit. ANSI code TPG321 and ISO code TPGN160304 apply for cross-reference.

Installation Notes

Insert seating and clamping should be performed with the machine fully powered down and the spindle locked. Use the toolholder manufacturer's specified clamp screw torque procedure and inspect the insert pocket for chips or debris before seating the insert. Verify insert orientation and rake direction before resuming cuts. This work is typically performed by a CNC machinist or toolroom technician following standard shop safety practices.