Kennametal 3643853 NPL51 KD1425 Profiling Insert

Product Description

The KENNAMETAL 3643853 is a parallelogram-shaped carbide profiling insert in the Top Notch series, designated style NPL51 with manufacturer grade KD1425. It measures 0.375 inches in length, 0.25 inches in width, and 0.125 inches in thickness, with a corner radius of 0.0156 inches (0.40 mm). The insert features a negative rake angle, a 55-degree included angle, and a zero-degree relief angle. With four cutting edges and a screw-type holding method, it is engineered for profiling and turning operations on non-ferrous metal workpieces. Installation and tool changes are handled by machinists and CNC toolroom technicians.

This insert is designed for profiling and turning applications in non-ferrous metal materials, classified under primary workpiece material code N, which covers materials such as aluminum, copper, and brass alloys. The maximum depth of cut is 0.125 inches. Its left-hand configuration suits specific toolholder orientations common in CNC turning centers and manual lathes where right-to-left cutting direction is required. The common chipbreaker geometry supports general-purpose profiling across a range of non-ferrous workpiece conditions.

Key Features

• NPL51 insert style in parallelogram shape with 55-degree included angle
• KD1425 grade carbide with PCD coating finish
• Left-hand cutting orientation for specific toolholder compatibility
• Four cutting edges maximize insert utilization and reduce tooling cost per edge
• 0.0156-inch corner radius suits fine profiling and contour work on non-ferrous materials
• Screw-type insert holding method for secure, repeatable indexing

Compatibility

Conforms to standards NPL51 and ISO code KCGX110304L15. Designed as a Top Notch series OEM-style replacement insert for compatible NPL51-style screw-clamp toolholders used in profiling and turning of non-ferrous metals.

Installation Notes

Insert seating and clamping should be performed with the machine fully powered down and the spindle locked. Use the appropriate Torx or hex key driver specified by the toolholder manufacturer to secure the clamping screw — do not over-tighten or under-tighten the screw. Verify insert orientation and hand before resuming cutting operations. Indexing or replacement should be carried out by a qualified machinist following the toolholder manufacturer's service instructions.