Robbjack ST-430-05-T Square End Mill 5/32 in 4 Flute Carbide

Product Description

The ROBBJACK ST-430-05-T is a solid carbide square end mill from the ST-430 Super Tuffy series, designed for high-performance milling in demanding materials. It features a 5/32-inch cutting diameter, a 9/16-inch length of cut, and a 4-flute configuration with a 30-degree helix angle. A TiN (titanium nitride) finish provides surface hardness and heat resistance at the cutting edge. The 3/16-inch straight-cylindrical shank fits standard collets and tool holders. This end mill is centercutting, allowing plunge entry into a workpiece. Right-hand cut and right-hand flute geometry are standard for conventional CNC and manual milling setups.

The ST-430-05-T is suited for precision milling operations in steel, stainless steel, and other ferrous and non-ferrous alloys where tool rigidity and edge retention are critical. Its compact 2-inch overall length and regular-length classification make it appropriate for tight-clearance profiling, slotting, and side milling in machining centers and manual mills. Machinists, CNC operators, and tool-and-die professionals working in job shops, aerospace, or general manufacturing will find this tool sized for detail work and small-feature cutting.

Key Features

• Solid carbide construction with Super Tuffy material grade for rigidity and wear resistance
• TiN finish for increased surface hardness and reduced friction at the cutting edge
• 4-flute design with 30-degree helix angle for smooth chip evacuation and surface finish
• Centercutting geometry allows direct plunge milling without pre-drilling
• Right-hand cut, right-hand flute - compatible with standard spindle rotation on CNC and manual mills
• Straight-cylindrical shank for use with ER collets, end mill holders, and shrink-fit tooling

Compatibility

Designed for use in standard 3/16-inch collets or end mill holders on CNC machining centers, vertical mills, and compatible manual milling machines. Part of the ROBBJACK ST-430 series.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the spindle fully stopped and the machine in a safe, locked-out state. Ensure the collet or tool holder bore is clean and free of chips before seating the shank. Do not exceed the recommended tool stick-out for the application, as excessive overhang reduces rigidity and accelerates tool wear. Follow machine manufacturer guidelines for runout tolerances and clamping torque specifications for the tool holding system in use.