Sandvik Coromant 5740389 Square-shoulder Face Mill 3 in

Product Description

The SANDVIK COROMANT 5740389 is an indexable square-shoulder face mill designed for high-precision milling operations in metal cutting applications. This tool features a 3-inch maximum cutting diameter with a 1-inch arbor hole and accepts up to 6 inserts of the R590-1105.. style. The 90-degree lead angle enables true square-shoulder milling, producing clean 90-degree walls and flat floor surfaces in a single pass. Through-coolant capability delivers cutting fluid directly to the cutting zone, improving chip evacuation and extending insert life. The cutter body is constructed from steel and follows the RA590..Rxx cutter style designation. It is installed and operated by CNC machinists and toolroom professionals in production and job-shop environments.

The 5740389 is suited for face milling, shoulder milling, and step milling operations on steel, cast iron, and similar workpiece materials where a true 90-degree shoulder profile is required. With a maximum depth of cut of 11 mm (0.4331 inches), this mill is appropriate for moderate-depth passes in both roughing and semi-finishing applications. The right-hand cutting direction is standard for conventional milling setups on vertical and horizontal machining centers. Insert clamping is achieved through a clamp and screw holding method, providing secure insert seating under high cutting loads.

Key Features

• 3-inch maximum cutting diameter with 1-inch arbor hole for standard arbor mounting
• Accepts 6 inserts of the R590-1105.. style in the RA590..Rxx cutter body
• 90-degree lead angle produces true square shoulders and flat floors in one pass
• Through-coolant design channels fluid directly to the cutting zone for improved chip evacuation
• Maximum depth of cut of 11 mm (0.4331 inches) suitable for roughing and semi-finishing
• Steel cutter body with clamp and screw insert holding method for secure insert retention

Compatibility

Compatible with R590-1105.. series inserts. Designed for use in the CoroMill Century series platform on right-hand cutting setups with standard 1-inch arbor toolholding systems.

Installation Notes

This face mill is installed by qualified CNC machinists or toolroom technicians. Before mounting or insert changes, confirm the machine spindle is fully stopped and locked out per applicable machine-specific lockout/tagout procedures. Verify arbor and spindle interfaces are clean and free of chips before seating the cutter. Follow the insert manufacturer torque specifications provided with the R590-1105.. insert documentation when securing clamp screws.