Kennametal 4050522 DPGR432 KCU25 Carbide Profiling Insert

Product Description

The KENNAMETAL 4050522 is a solid carbide profiling and turning insert in the DPGR432 configuration, manufactured to the KCU25 grade with an AlTiN coating applied by PVD process. It features a parallelogram shape with a 55-degree included angle, a 0.5-inch inscribed circle, and a corner radius of 0.0312 inches (0.79 mm). The insert carries a positive rake angle of 5 degrees and an 8-degree relief angle, supporting aggressive chip evacuation during profiling passes. Licensed machinists and CNC lathe operators install this insert in Top Notch-series toolholders for external profiling and contour turning operations on a range of workpiece materials.

This insert is suited for profiling and turning applications across a broad material spectrum including steel, stainless steel, cast iron, non-ferrous metals, and superalloys including titanium. The neutral hand orientation and clamp-style holding method make it compatible with standard Top Notch-series clamping systems commonly found in production turning environments, both light-duty finishing and moderate-depth roughing profiles. It is appropriate for job shops and production facilities running CNC lathes and manual turning centers where consistent edge geometry on contoured workpieces is required.

Key Features

• AlTiN PVD coating provides heat resistance and extended tool life when cutting steel, stainless steel, and superalloys
• Parallelogram (DPGR) insert geometry with 55-degree included angle optimized for profiling and contour turning
• Positive rake (5 degrees) reduces cutting forces and supports cleaner chip formation on difficult materials
• Corner radius of 0.0312 inches (0.79 mm) delivers precise surface finish on contoured features
• Maximum depth of cut up to 0.2035 inches suits both finishing and light roughing passes
• Two cutting edges per insert extend usable life before replacement
• Fine-grain carbide substrate in KCU25 grade balances toughness and wear resistance across ISO material groups P, M, K, N, and S

Compatibility

Designed as an OEM-style replacement insert conforming to DPGR432 and ISO code DCGR150408 standards, for use in Top Notch-series clamp-style toolholders. Compatible with workpiece materials coded ISO P (steel), M (stainless steel), K (cast iron), N (non-ferrous), and S (superalloys and titanium).

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician with the machine spindle fully stopped and all energy sources locked out per OSHA lockout/tagout procedures. Seat the insert firmly against the toolholder pocket before engaging the clamp; do not force a misaligned insert. Inspect the insert pocket for chips or debris before seating to ensure proper contact and geometry transfer. Follow the toolholder manufacturer's clamping torque specifications for the Top Notch-series clamping screw.