Sandvik Coromant 5739777 Square-shoulder Face Mill 3 in

Product Description

The SANDVIK COROMANT 5739777 is an indexable square-shoulder face mill designed for high-precision milling operations in metal cutting applications. Built as part of the CoroMill 390 series, it accepts seven R390-17.. style inserts held in place by clamp and screw, delivering a 90-degree lead angle and positive rake geometry. The cutter operates in a right-hand cutting direction and is constructed from steel for rigidity and dimensional stability. With a maximum cutting diameter of 3 inches and a maximum depth of cut of 15.70 mm (0.618 inches), this tool handles demanding square-shoulder milling passes in production environments. Licensed machinists and CNC tooling specialists are the primary installers and operators.

The 5739777 is suited for square-shoulder milling on vertical and horizontal machining centers where a 90-degree wall interface is required. The coarse pitch configuration with seven insert pockets supports aggressive material removal rates in ferrous and non-ferrous stock. A 1-inch arbor hole diameter with a 9.75 mm keyway width provides secure arbor mounting on standard spindle setups. This cutter is intended for shop-floor and production machining environments where consistent insert indexing and repeatable depth of cut are critical to part quality.

Key Features

• 90-degree lead angle for true square-shoulder milling profiles
• Seven insert pockets with coarse pitch spacing for high metal removal rates
• Accepts R390-17.. compatible inserts with clamp and screw retention
• Positive rake geometry reduces cutting forces and heat buildup
• Right-hand cutting direction; steel body construction for rigidity
• 1-inch arbor hole with 9.75 mm keyway for positive drive engagement

Compatibility

Compatible with R390-17.. insert style as specified by the manufacturer. Part of the CoroMill 390 series platform. Designed for use on standard arbor-style spindle setups with a 1-inch bore diameter.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC tooling technician. Always power down and lock out the machine spindle before mounting or indexing inserts. Ensure the arbor and keyway are clean and free of chips or burrs before seating the cutter body. Follow the machine tool manufacturer torque guidelines for drawbar and insert clamping hardware.