Walter 8115769 Turning Insert DNMG431-MP3 WPP20G Carbide

Product Description

The WALTER 8115769 is a DNMG431-MP3 WPP20G grade solid carbide turning insert designed for precision metal cutting in CNC lathe and turning center applications. It features a multilayer CVD coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal stability during interrupted and continuous cuts. The insert carries a 55-degree diamond shape (D), a neutral hand orientation, a 0.0157-inch corner radius, and an inscribed circle of 0.5 inches. With 4 usable cutting edges and a chamfered and honed cutting edge style, this insert is suited for high-productivity roughing and semi-finishing operations. Licensed machinists and CNC operators install and index this insert at the machine.

This insert is engineered primarily for steel (ISO material group P, grade P20) and secondarily for cast iron (ISO material group K, grade K30). Its MP3 chip breaker geometry supports turning, facing, boring, and back turning operations across a range of depths of cut up to 0.61 inches. The negative rake angle and DNMG-MP3 series geometry are well matched to rigid toolholding setups in production environments where consistent chip control and surface finish are priorities. It conforms to both ANSI and ISO standards, with ISO code DNMG150404-MP3 WPP20G.

Key Features

• Multilayer CVD coating - TiCN, Al2O3, TiN - for thermal resistance and extended tool life in steel and cast iron
• 55-degree diamond insert shape with 4 cutting edges for maximum edge utilization per insert
• MP3 chip breaker geometry supports turning, facing, boring, and back turning
• Chamfered and honed cutting edge style reduces chipping on entry and during interrupted cuts
• Negative rake angle (22.5 degrees) with N clearance provides stable, heavy-duty cutting geometry
• Clamp and pin insert holding method compatible with standard DNMG toolholders
• Meets ANSI and ISO standards; ISO code DNMG150404-MP3 WPP20G

Compatibility

Designed for use in standard DNMG-style toolholders that accept a 0.5-inch inscribed circle, 55-degree diamond insert with clamp and pin retention. Compatible with ISO and ANSI-compliant turning systems. Suitable for steel and cast iron workpiece materials per ISO P and K classifications.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque screwdriver or clamp wrench specified by the toolholder manufacturer - do not overtighten, as this can fracture the insert. Confirm seating of the insert in the pocket and verify clearance geometry before resuming cuts.