Sumitomo 104A771 Cermet Turning Insert 1/4 in Triangle

Product Description

The SUMITOMO 104A771 is a cermet-coated turning insert designed for precision metal cutting on CNC lathes and turning centers. Built to ANSI and ISO 13399 standards, this insert features a 60-degree triangular shape, a positive rake geometry, and a flat-top chip breaker configuration. The PVD-coated cermet substrate delivers high wear resistance with moderate toughness, making it well suited for steel finishing and semi-finishing operations. The screw-holding method and positive side clearance support secure, repeatable seating in compatible toolholders. This insert is handled and installed by machining professionals and CNC tool setup technicians.

This insert is intended for turning operations on steel workpieces (ISO material group P). Its left-hand cutting orientation suits specific toolholder configurations requiring that geometry. The flat-top chip breaker and 1/64 inch corner radius support smooth chip evacuation and surface finish quality on steel components. The T1500Z grade is engineered for applications demanding high wear resistance through moderate toughness demands, covering a broad range of steel turning scenarios from roughing boundaries into finish cuts.

Key Features

• Cermet insert material with PVD coating for high wear resistance on steel
• 60-degree triangular insert shape with positive rake and positive side clearance
• Flat-top chip breaker for controlled chip flow in steel turning
• 1/64 inch corner radius for surface finish and edge strength balance
• Left-hand cutting orientation for compatible toolholder configurations
• Screw-holding method for secure, repeatable insert indexing

Compatibility

Designed for use in toolholders accepting ANSI insert code TPGG221 and ISO insert code TPGG110304 style inserts. ISO code TPGT110304L-SD applies. Confirm toolholder hand, pocket geometry, and insert seating requirements before installation.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before handling or indexing inserts. Use the correct torque wrench and insert screw to seat the insert without over-tightening, which can crack the substrate. Verify insert hand orientation and toolholder compatibility before mounting.