Promax 155-01024 Square End Mill 5/32 Inch 4 Flute Carbide

Product Description

The PROMAX 155-01024 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. Built to Series 155 specifications, it features a 5/32-inch (0.1563-inch) diameter cutting face with four spiral flutes and a 40-degree helix angle finished with an AlTiN coating for heat and wear resistance at elevated cutting speeds. The stub-length geometry - 3/8-inch length of cut and 2-inch overall length - provides added rigidity in tight setups. This tool is installed and operated by machinists and CNC programmers working in job shops, tool rooms, and production environments.

This end mill suits ferrous and non-ferrous milling operations where a compact, rigid tool is required. The 3/16-inch shank diameter fits standard collets and tool holders commonly found on vertical machining centers, CNC mills, and manual knee mills. The centercutting design allows plunge milling in addition to peripheral and slot cutting. The right-hand cut, right-hand flute configuration follows the most common spindle rotation standard in CNC machining setups.

Key Features

• Solid carbide micrograin construction for rigidity and edge retention
• AlTiN finish improves heat resistance and extends tool life in dry or semi-dry cutting
• 40-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Centercutting design enables plunge entry without a pre-drilled pilot hole
• Stub-length geometry (3/8-inch LOC) maximizes stiffness and reduces deflection
• Right-hand cut, right-hand spiral flute - compatible with standard CNC spindle rotation

Compatibility

Designed as an OEM-style replacement or standard tooling selection for 3/16-inch collets and tool holders used in CNC vertical machining centers, manual mills, and similar machine tools requiring a 5/32-inch square end mill.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Always power down and lock out the spindle before changing tooling. Seat the 3/16-inch shank fully in the collet to the manufacturer-recommended engagement depth and torque the collet nut per the tool-holder specification. Verify runout with a dial indicator before beginning a cut, as micrograin carbide is sensitive to excessive runout and side loading.