Sumitomo 1D81712 Ceramic Turning Insert TPG322 NB90S

Product Description

The SUMITOMO 1D81712 is a ceramic turning insert designed for high-speed, high-temperature metal cutting applications. It carries the ANSI designation TPG322 and grade NB90S, with an Al2O3 and TiC coating applied over a ceramic substrate. The insert features a triangular shape with a 60-degree included angle, an 11-degree relief angle, and a positive rake geometry. At 0.6496 inches in length with a 3/8-inch inscribed circle and a 1/32-inch corner radius, it is suited for precision turning operations. Machinists and tooling technicians install this insert in compatible toolholders using a clamp-style holding method.

This insert is engineered for turning cast iron workpieces, where ceramic grades excel due to their resistance to abrasive wear and ability to maintain cutting edges at elevated temperatures. It is appropriate for both roughing and finishing passes depending on feed and depth parameters. The TPG insert style fits standard TP-series toolholders and is commonly used in production turning environments where consistency and insert life are critical. The NB90S grade is positioned within material grades C4 and C8, making it well matched to gray and nodular cast iron applications.

Key Features

• Al2O3 and TiC ceramic coating for enhanced wear resistance on cast iron
• TPG322 ANSI style with 60-degree triangular insert shape for three usable cutting edges
• Positive rake geometry reduces cutting forces and heat generation
• 11-degree relief angle (clearance code P) minimizes flank wear contact
• Clamp-style insert holding for secure, repeatable seating in TP-series toolholders
• Meets ANSI and ISO 13399 standards; ISO code TPGN160308

Compatibility

Designed for use in TP-series clamp-style toolholders accepting TPG322 inserts. Compatible with ANSI code TPG322 and ISO code TPGN160308 toolholder pockets. Intended for primary use on cast iron workpieces per material codes K, C4, and C8.

Installation Notes

Insert replacement should be performed by a qualified machinist or tooling technician with the machine powered down and all axes locked out per facility lockout/tagout procedures. Seat the insert fully into the toolholder pocket before tightening the clamp to the toolholder manufacturer's specification. Inspect the insert seat and clamp for chips or debris prior to installation to ensure proper contact and prevent premature edge failure. Handle ceramic inserts with care, as the substrate is brittle and susceptible to chipping from impact or improper clamping.