Robbjack ST-430-06-T Square End Mill 3/16 in 4 Flute Carbide

Product Description

The ROBBJACK ST-430-06-T is a solid carbide square end mill designed for precision metal removal in demanding machining applications. Part of the ST-430 Super Tuffy series, this 4-flute tool features a 3/16 inch cutting diameter, a 5/8 inch length of cut, and a 2 inch overall length. The TiN coating extends tool life in ferrous and non-ferrous materials. A 30-degree helix angle promotes smooth chip evacuation, and the centercutting geometry allows direct plunge entry. Right-hand cut and right-hand flute configuration is standard for conventional CNC and manual milling setups.

This end mill is suited for light to medium milling operations in tool steels, alloy steels, stainless, and other hard materials where the Super Tuffy carbide grade provides the necessary wear resistance. The straight-cylindrical shank accepts standard collet and end mill holders in matching 3/16 inch bore sizes. Typical applications include slotting, profiling, and peripheral milling on CNC machining centers and manual knee mills. The regular length classification makes it a workhorse selection for shops running high-tolerance detail work on small-feature components.

Key Features

• Solid carbide Super Tuffy grade for improved hardness and wear resistance in difficult materials
• TiN finish for extended tool life and reduced friction at the cutting edge
• 4-flute configuration provides a good balance of chip clearance and cutting edge support
• 30-degree helix angle promotes efficient chip flow and reduces cutting forces
• Centercutting design allows direct plunge milling without pre-drilling
• Right-hand cut, right-hand flute with straight-cylindrical shank for broad holder compatibility

Compatibility

Designed for use with standard collet chucks and end mill holders with a 3/16 inch bore. Part of the ROBBJACK ST-430 series regular-length square end mill line.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the holder bore and tighten to the holder manufacturer specified torque range using appropriate wrenches. Verify runout with a dial indicator before commencing cuts, as excessive runout accelerates wear on small-diameter carbide tools.