Helical Solutions 30137 Square End Mill 0.25in 4 Flute Carbide

Product Description

The HELICAL SOLUTIONS 30137 is a 4-flute solid carbide square end mill designed for precision milling operations in metalworking and machining applications. It measures 0.25 inches in diameter with a 0.375-inch length of cut, a 0.25-inch straight cylindrical shank, and a 2-inch overall length. The tool features a right-hand cut with right-hand helical flutes and a variable index flute geometry, which helps reduce chatter and improve surface finish. An APLUS coating is applied to extend tool life and improve performance in ferrous and non-ferrous materials. This end mill is centercutting, allowing plunge entry into the workpiece.

This end mill suits general-purpose milling tasks including slotting, profiling, and peripheral milling on CNC machining centers and manual mills. It is a single-end tool intended for use by machinists and tool-and-die professionals working in job shops, production environments, and aerospace or mold-making applications where tight tolerances are required. The compact 0.375-inch length of cut makes it well suited for shallow-pocket and contour work where rigidity is a priority.

Key Features

• 0.25-inch diameter with 0.375-inch length of cut for precise shallow milling
• 4-flute solid carbide construction for rigidity and wear resistance
• Variable index flute geometry reduces harmonic vibration and chatter
• APLUS coating extends tool life in demanding cutting conditions
• Centercutting design allows direct plunge entry
• Right-hand helical flutes with straight cylindrical shank for standard ER or set-screw toolholders

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill compatible with standard 0.25-inch bore milling chucks, ER collet systems, and set-screw toolholders used on CNC and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is in a safe state before inserting or removing the end mill. Secure the shank to the full recommended insertion depth in the toolholder to maximize rigidity and minimize runout. Follow the cutting tool manufacturer's recommended speeds and feeds for the workpiece material and coating type.