Kennametal 3643854 NPR51 KD1425 Profiling Insert Carbide

Product Description

The KENNAMETAL 3643854 is a carbide profiling insert in the Top Notch series, designated NPR51 with manufacturer grade KD1425. It carries a parallelogram shape with a 55-degree included angle, a 0-degree relief angle, and a negative rake geometry. The insert measures 0.375 inches in length and 0.125 inches in thickness, with a corner radius of 0.0156 inches (0.40 mm). With four cutting edges and an uncoated PCD finish, it is suited for high-precision profiling and turning operations on non-ferrous metals. Installation is performed by screw-holding, right-hand orientation, and the insert conforms to the NPR51 and KCGX110304R15 standards.

This insert is designed for profiling and turning applications where non-ferrous workpiece materials such as aluminum, copper, and their alloys are machined. The KD1425 grade with uncoated PCD coating classification delivers consistent edge integrity at the cutting depths this style supports, with a maximum depth of cut of 0.1256 inches. It is typically used in CNC turning centers and manual lathes by machinists and tool-and-die professionals working in production or job-shop environments requiring repeatable profile geometry on non-ferrous parts.

Key Features

• Carbide insert with KD1425 manufacturer grade optimized for non-ferrous metal (N10, N20 material grades)
• Four cutting edges extend usable tool life per insert
• Parallelogram shape with 55-degree included angle and 0-degree relief for profiling geometry
• Screw-holding method with right-hand orientation for secure, repeatable seating
• Corner radius of 0.0156 inches (0.40 mm) for controlled surface finish on profiled contours
• Conforms to NPR51 and ISO code KCGX110304R15 standards

Compatibility

Designed for use in Top Notch series toolholders accepting NPR51-style inserts. Compatible with screw-clamp insert seats requiring a parallelogram insert with a 0.249-inch inscribed circle and right-hand cutting orientation. Verify toolholder pocket specifications against the NPR51 and KCGX110304R15 designations before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine before seating or replacing inserts. Use the appropriate torx or hex key driver specified by the toolholder manufacturer when tightening the clamping screw — do not overtighten, as carbide inserts are brittle and can fracture under excessive clamping force. Inspect the pocket seat and clamping screw threads for wear or debris before seating a new insert.