Sumitomo 19T5WKU Turning Insert Carbide AC5015S Triangle

Product Description

The SUMITOMO 19T5WKU is a solid carbide turning insert designed for precision metal cutting on CNC lathes and turning centers. It carries the manufacturer catalog designation TPMT21.51ESU-AC5015S and belongs to the AC5000S series. The insert features a triangular shape with a 60-degree included angle, a 0.25 inch inscribed circle, and a 0.0157 inch corner radius. An Absotech Bronze PVD coating is applied to the AC5015S grade carbide substrate, enhancing wear resistance and thermal stability during interrupted and continuous turning operations. The insert uses a positive rake geometry and a screw-type holding method, making it compatible with standard TPMT-style toolholders. Installed by machining professionals in production and job-shop environments.

This insert is engineered primarily for turning non-ferrous metals and superalloys, with a secondary rating for stainless steel. The ESU chip breaker geometry promotes efficient chip evacuation and helps control built-up edge when cutting gummy or work-hardening materials. Typical applications include finish and semi-finish turning passes on aerospace components, medical parts, and precision-machined non-ferrous workpieces where tight tolerances and surface finish are critical. The neutral hand orientation allows use in both conventional and back-turning configurations depending on toolholder setup.

Key Features

• AC5015S grade carbide with Absotech Bronze PVD coating for extended tool life on non-ferrous and superalloy cuts
• ESU chip breaker geometry promotes clean chip evacuation on non-ferrous and work-hardening materials
• Positive rake design reduces cutting forces and heat generation at the workpiece interface
• Screw-type insert holding method provides rigid, repeatable seating in TPMT-style toolholders
• Neutral hand orientation supports both standard and reverse turning setups
• Meets ANSI and ISO 13399 standards for insert geometry and identification

Compatibility

Designed as a direct-fit replacement for TPMT-style insert seats. ISO code TPMT110204N-SU confirms compatibility with toolholders accepting TPMT 21.51 inserts per ANSI and ISO 13399 standards. Primary workpiece material codes N and S indicate suitability for non-ferrous metals and superalloys; secondary suitability for stainless steel.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before changing inserts. Seat the insert fully into the pocket and torque the clamping screw to the toolholder manufacturer's specification using a calibrated torque driver. Inspect the insert pocket for chips or debris before seating to avoid seating errors that can damage the pocket or cause premature insert failure.