Sumitomo 19PW232 Carbide Turning Insert TNMG331EGU AC630M

Product Description

The SUMITOMO 19PW232 is a TNMG-style solid carbide turning insert designed for precision metal cutting on CNC lathes and turning centers. Manufactured to ANSI and ISO 13399 standards, this insert carries the AC630M grade designation and features a CVD-applied aluminum oxide (Al2O3) coating. The triangular insert shape provides three usable cutting edges with a neutral hand orientation and a positive rake angle of 7 degrees. The 1/64-inch corner radius and 60-degree included angle make it well suited for finish and semi-finish turning passes where edge sharpness and surface finish control are critical. Machinists and tooling technicians install this insert as a direct replacement in compatible TNMG toolholders.

This insert is intended for use in general turning and finish turning applications on machining centers and manual lathes. The AC630M grade with Al2O3 CVD coating is formulated for cutting steel and is listed with stainless steel as a secondary workpiece material, making it applicable to a range of ferrous turning work. The EGU chip breaker geometry supports controlled chip evacuation during light-to-moderate depth-of-cut operations. It is held in place using a clamp and pin insert-holding method, which is standard on most TNMG-compatible toolholders used in production and job shop environments.

Key Features

• TNMG insert style conforming to ANSI code TNMG331EGU and ISO code TNMG160404N-GU
• AC630M manufacturer grade with CVD-applied Al2O3 coating for wear resistance on ferrous materials
• 3/8-inch inscribed circle (0.3750 inches) with 3/16-inch insert thickness (0.1875 inches)
• 1/64-inch corner radius (0.0156 inches) for precise finish and semi-finish turning
• Positive rake angle of 7 degrees with EGU chip breaker geometry
• Neutral hand orientation for use in standard TNMG clamp-and-pin toolholders

Compatibility

Designed as a direct-replacement turning insert for TNMG-style toolholders that accept a 3/8-inch inscribed circle, clamp-and-pin held triangular carbide insert with a 0.150-inch hole diameter.

Installation Notes

Installation is performed by machining technicians during planned insert indexing or replacement. Power down and lock out the machine tool before accessing the turret or toolholder. Use the appropriate torx or hex wrench to release the clamp and pin, seat the new insert fully against the pocket locating surfaces, and retighten the clamp fastener to the toolholder manufacturer's specified torque. Inspect the insert seat for chips or debris before seating to prevent insert rocking and premature edge failure.