Sandvik Coromant 5739318 Square Shoulder End Mill 1 in

Product Description

The SANDVIK COROMANT 5739318 is an indexable square-shoulder end mill built around the CoroMill 390 platform. It accepts two R390-17 series inserts secured by screw clamping and is designed for 90-degree square-shoulder milling operations. The tool features a 1-inch cutting diameter, a maximum depth of cut of 15.7 mm (0.618 inches), and an overall length of 4 inches. Through-coolant capability is integrated into the body, supporting extended tool life and chip evacuation at higher cutting speeds. The steel body is engineered for rigidity in demanding milling applications. Maximum spindle speed is rated at 30,500 RPM.

This end mill is intended for square-shoulder and ramping operations on machining centers and CNC mills in both production and job-shop environments. The CoroMill 390 series is commonly applied in aerospace, general engineering, and die-mold work where true 90-degree walls and consistent surface finish are required. The 1-inch Weldon flat shank provides positive rotational drive in standard end mill holders. Installation is performed by machinists and CNC setup technicians as part of tooling changes or new program setups.

Key Features

• 1-inch cutting diameter with 90-degree lead angle for true square-shoulder profiles
• Maximum depth of cut of 15.7 mm (0.618 inches) per pass
• Through-coolant design for improved chip evacuation and insert life
• Accepts 2 R390-17 series indexable inserts secured by screw clamp
• Weldon flat shank provides positive drive and reduces pullout risk
• Ramping capability allows helical and linear ramp entry into workpiece
• Maximum rated speed of 30,500 RPM

Compatibility

Designed for use with R390-17 series indexable inserts. ISO tool designation RA390-025M25-17L. Compatible with standard 1-inch Weldon flat end mill holders on CNC machining centers equipped with through-spindle coolant.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Confirm machine spindle is fully stopped and locked out before mounting or removing the tool. Seat the Weldon flat shank fully into the holder and torque the set screw to the holder specification before operation. Verify insert seating and screw torque against the SANDVIK COROMANT CoroMill 390 assembly instructions prior to running the program.