Sandvik Coromant 5739309 Square-shoulder End Mill 5/8 in

Product Description

The SANDVIK COROMANT 5739309 is an indexable square-shoulder end mill built for precision milling in metal-cutting applications. Part of the CoroMill 390 series, it features a 5/8-inch cutting diameter and a maximum depth of cut of 10.01 mm (0.394 inches). The tool body is constructed from steel and uses a cylindrical shank measuring 5/8 inch in diameter. With a maximum spindle speed of 31,000 RPM and through-coolant capability, this end mill is suited for high-speed, thermally demanding cuts where chip evacuation and tool life are critical. It accepts standard R390-11.. indexable inserts secured by screw clamping, making insert replacement straightforward in production environments.

This end mill is designed for CNC machining centers used in aerospace, automotive, die-and-mold, and general metalworking operations. The 90-degree lead angle produces true square shoulders, making it well suited for slotting, side milling, and ramping operations. The 2-flute configuration with through-coolant support is appropriate for both roughing and semi-finishing passes. Machinists and CNC operators working with ferrous and non-ferrous materials will find this tool compatible with typical vertical and horizontal machining center setups requiring a 5/8-inch straight-shank toolholder.

Key Features

• 5/8-inch cutting diameter with a 90-degree lead angle for true square-shoulder milling
• Maximum depth of cut of 10.01 mm (0.394 inches) for productive material removal
• Through-coolant design for improved chip evacuation and thermal control at high RPM
• Accepts 2 indexable R390-11.. inserts with screw-clamping retention
• Ramping-capable end mill type for versatile toolpath strategies
• Steel tool body with cylindrical shank for rigid, precise toolholder engagement

Compatibility

Designed to accept R390-11.. series indexable inserts. Compatible with toolholders sized for a 5/8-inch cylindrical shank. Part of the CoroMill 390 platform.

Installation Notes

Installation and setup should be performed by a qualified CNC machinist or tooling technician. Power down and lock out the machine spindle before mounting or changing inserts or the tool body. Use a torque wrench appropriate for insert screws to avoid under- or over-tightening, and verify through-coolant passages are clear before engaging the spindle. Confirm shank engagement depth meets toolholder manufacturer minimums before running at elevated RPM.