Kennametal 1849903 NPGR52 KC5025 Carbide Profiling Insert

Product Description

The KENNAMETAL 1849903 is a solid carbide profiling and turning insert in the NPGR52 style, designed for precision grooving, profiling, and turning operations on CNC lathes and turning centers. This left-hand insert carries the KC5025 manufacturer grade and features an AlTiN PVD coating applied over an ultra-fine grain carbide substrate. The parallelogram-shaped insert has an included angle of 55 degrees, a positive rake angle of 10 degrees, and a relief angle of 8 degrees. Corner radius measures 0.0312 inches (0.79 mm), giving it clean, controlled profile transitions on finished surfaces. Installation is performed by clamp-style holding. It weighs approximately 0.022 pounds per piece.

This insert is suited for profiling and turning operations across a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, and superalloys and titanium. It fits into Top Notch series toolholders designed for NPGR52 left-hand insert seats. Typical applications include contour turning, shoulder profiling, and finish turning passes on production and job-shop turning equipment where dimensional accuracy and surface finish are critical. Licensed machinists and CNC tooling technicians are the primary users in both shop-floor and production environments.

Key Features

• AlTiN PVD coating for extended tool life across steel, stainless, cast iron, and superalloy workpieces
• Ultra-fine grain carbide substrate in KC5025 grade for edge integrity under interrupted and continuous cuts
• Positive rake geometry with 10-degree rake angle reduces cutting forces and heat buildup
• 0.0312-inch corner radius supports accurate profiling and reduced surface stress at part transitions
• Two cutting edges per insert maximize value per unit in production setups
• Clamp-style holding method provides rigid, repeatable seating in compatible toolholders

Compatibility

Designed for use in Top Notch series toolholders accepting NPGR52L left-hand inserts. ISO code KCGR110308L08. Compatible standards references: NPGR52L and KCGR110308L08.

Installation Notes

Installation and indexing should be performed by a qualified machinist or CNC tooling technician with the machine powered down and spindle locked. Use the appropriate clamp screw and torque tool specified by the toolholder manufacturer — do not over-tighten the clamp, as this can chip the carbide seat or insert edge. Inspect the toolholder pocket and clamp for wear or debris before seating the insert. Verify insert orientation for left-hand cutting direction before resuming operation.