Robbjack ST-430-04-T 1/8 in 4 Flute Carbide End Mill

Product Description

The ROBBJACK ST-430-04-T is a solid carbide square end mill engineered for precision milling in demanding shop environments. Designed for use in CNC machining centers and manual mills, this tool features a 1/8-inch cutting diameter with a 1/2-inch length of cut and a 1-1/2-inch overall length. The 4-flute, 30-degree helix geometry promotes efficient chip evacuation while maintaining a smooth surface finish. A TiN (Titanium Nitride) coating adds surface hardness and reduces friction, extending tool life in general-purpose and ferrous material applications. Part of the ST-430 Super Tuffy series, this end mill is built for reliability in close-tolerance work.

This end mill is suited for slot milling, profiling, and peripheral milling operations in a variety of materials. The centercutting design allows plunge cutting, adding versatility for blind pocket operations. Right-hand cut and right-hand flute orientation make this a standard-configuration tool for most CNC and manual milling setups. It fits applications where tight tolerances and consistent performance are required, including tool rooms, production shops, and prototype machining environments where a 1/8-inch diameter tool is specified.

Key Features

• Solid carbide construction from the ST-430 Super Tuffy material grade for rigidity and wear resistance
• TiN finish reduces friction and increases surface hardness for extended tool life
• 4-flute, 30-degree helix design for efficient chip evacuation and smooth finish
• Centercutting capability allows direct plunge entry into workpiece
• Right-hand cut and right-hand flute for standard milling machine compatibility
• Straight cylindrical shank for use in standard collets and end mill holders

Compatibility

Designed as an OEM-style replacement and standard-fit solid carbide end mill for 1/8-inch collets and end mill holders used in CNC machining centers and manual vertical mills.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully powered down and at rest before changing tooling. Secure the shank fully within the collet or holder to the manufacturer-recommended engagement depth, and verify runout with a dial indicator before beginning a cut. Do not exceed the rated length of cut when side milling, as extended tool deflection can affect dimensional accuracy and tool life.