Sumitomo 19T1372 Turning Insert WNMA432 AC4010K Carbide

Product Description

The SUMITOMO 19T1372 is a WNMA432 style carbide turning insert with AC4010K grade, designed for precision metal cutting operations on CNC lathes and turning centers. This insert features a trigon (80-degree included angle) shape with a neutral hand orientation and a 1/2 inch inscribed circle. The AC4010K grade uses a CVD-applied Al2O3 and TiCN multilayer coating marketed under Sumitomo's Super FF designation, which targets wear resistance and thermal stability during turning. The K10 material grade and negative rake geometry suit hard and abrasive workpiece materials. Licensed machinists and CNC operators install and index these inserts during routine tooling changes.

This insert is suited for external and internal turning, facing, and profiling applications on lathes and turning centers in both production shop and job shop environments. The WNMA style with pin and screw holding method is compatible with standard WNMA-format toolholders. The neutral hand allows use in a range of holder orientations. The 1/32 inch corner radius makes it appropriate for general-purpose finishing and semi-finishing passes on cast iron, hardened steels, and other abrasive materials where CVD-coated carbide performs reliably.

Key Features

• CVD-applied Al2O3 and TiCN multilayer coating (Super FF designation) for thermal and wear resistance
• Trigon insert shape with 80-degree included angle for versatile cutting geometry
• Negative rake, zero rake angle design for edge strength on hard and abrasive materials
• 1/32 inch corner radius suitable for general finishing and semi-finishing passes
• Pin and screw holding method for secure, repeatable seating in compatible toolholders
• Neutral hand orientation allows flexible toolholder pairing

Compatibility

Designed for use in standard WNMA-format turning toolholders that accept a 1/2 inch inscribed circle insert with pin and screw clamping. Verify toolholder pocket specifications before installation.

Installation Notes

Indexable carbide inserts are installed and replaced by machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key for the clamping screw and seat the insert fully against the pocket locating surfaces before torquing. Inspect the insert pocket and shim for chips or damage before seating a new insert to avoid premature edge failure.