Kennametal 6143943 Square End Mill 5/32 in 3 Flute Carbide

Product Description

The KENNAMETAL 6143943 is a solid carbide square end mill designed for precision milling in demanding metalworking applications. Built to the KC633M material grade and finished with a TiAlN coating, this single-end tool delivers heat and wear resistance suited to ferrous and difficult-to-machine materials. The 3-flute spiral geometry runs with a 30-degree helix angle, right-hand cut and right-hand flute orientation, and a centercutting design that allows both plunge and peripheral cutting. Installed by machinists and toolroom professionals, this end mill is a direct-fit solution for CNC machining centers and manual knee mills where tight tolerances are required.

This end mill is primarily intended for milling steel, stainless steel, and cast iron in production and job-shop environments. The 5/32 inch diameter and 9/16 inch length of cut make it appropriate for slot milling, profile milling, and finishing passes in small-feature workpieces. The 3/16 inch shank fits standard collet systems at that size. It is a single-end tool, meaning it is replaced rather than flipped when worn, consistent with solid carbide end mill practice.

Key Features

• Solid carbide construction with KC633M material grade for rigidity and wear life
• TiAlN coating provides thermal barrier and oxidation resistance in high-speed cutting
• 3-flute spiral design balances chip evacuation and surface finish
• 30-degree helix angle reduces cutting forces on steel and stainless steel
• Centercutting capable — supports plunge entry without a pre-drilled hole
• Right-hand cut and right-hand flute, compatible with standard spindle rotation

Compatibility

Designed for use in standard collet or end mill holders accepting a 3/16 inch shank diameter. Rated for primary workpiece materials including steel, stainless steel, and cast iron.

Installation Notes

Installation is performed by qualified machinists using a properly sized collet or end mill holder torqued per the toolholder manufacturer specifications. Confirm spindle speed and feed rate are set according to the workpiece material and coating recommendations before engaging the cut. Do not run this tool without verifying shank seating depth and runout with a dial indicator, as carbide is brittle and sensitive to setup error. Coolant through is not supported on this tool; external coolant or air blast is appropriate depending on the material and operation.