Kennametal 4146443 Ceramic Milling Insert Rngn Round

Product Description

The KENNAMETAL 4146443 is a round ceramic milling insert designed for high-performance metal removal in demanding cutting applications. Built to ANSI code RNG45T0420 and ISO code RNGN120700T01020, it carries the KYS30 ceramic grade with an uncoated, bright finish. The insert features a negative rake angle, T-Land cutting edge style, and a flat-top chip breaker geometry. With 8 cutting edges per insert and a double-sided design, it delivers extended tool life on difficult-to-machine materials. The 0.5-inch inscribed circle and 5/16-inch thickness make it a direct-fit option for compatible CRSN series cutter bodies. Licensed machinists and CNC tooling technicians install this insert in production milling environments.

This insert is engineered for cutting superalloys and titanium, material application code S, where ceramic tooling outperforms carbide at elevated cutting speeds. It suits high-speed face milling, shoulder milling, and profiling passes on aerospace, power generation, and industrial components where heat-resistant alloys and titanium grades are common workpiece materials. The neutral hand orientation allows use in a range of fixturing setups. The screw-clamping holding method ensures positive seating under the high cutting forces typical of superalloy milling operations.

Key Features

• KYS30 ceramic grade, uncoated and bright finished for superalloy and titanium machining
• 8 cutting edges per double-sided insert for maximum tool economy
• Round RNGN insert shape with 360-degree included angle and negative rake
• T-Land cutting edge style with flat-top chip breaker geometry
• Maximum depth of cut of 0.3937 inches for aggressive material removal
• Compliant with ANSI and ISO insert standards (ANSI RNG45T0420, ISO RNGN120700T01020)

Compatibility

Compatible with CRSN series cutter bodies. Designed as an OEM-style replacement insert for milling systems that accept RNGN-series round ceramic inserts with a 0.5-inch inscribed circle and screw-clamp holding method.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the spindle before seating or indexing inserts. Use the appropriate Torx or hex key to secure the clamping screw — do not overtighten, as ceramic inserts are brittle and can fracture under excessive clamp force. Verify the insert pocket and seating surface are clean and free of chips before installation to ensure proper contact and runout.