Sandvik Coromant 5740174 Square-shoulder End Mill 1-1/2 in

Product Description

The SANDVIK COROMANT 5740174 is an indexable square-shoulder end mill built for high-productivity milling in machining centers and CNC mills. Based on the CoroMill 390 platform, it produces true 90-degree shoulders with a 1.5-inch cutting diameter and a maximum depth of cut of 15.7 mm (0.618 inches). The tool body is constructed from steel and accepts four R390-17 series indexable inserts secured by screws. Through-coolant capability is built in, supporting extended tool life at elevated spindle speeds up to 22,700 RPM. The 1.25-inch Weldon flat shank provides positive drive retention in standard side-lock holders.

This end mill is suited for square-shoulder milling, ramping, and slot entry operations in production machining environments. It is used primarily by CNC machinists and tool-and-die professionals working in aerospace, automotive, and general metalworking applications. The four-insert configuration delivers high metal removal rates while the through-coolant design keeps cutting edges clear of chips and controls heat at the insert face. The 4.5-inch overall length gives adequate reach for most standard fixturing setups without sacrificing rigidity.

Key Features

• 1.5-inch cutting diameter with a true 90-degree lead angle for accurate square shoulders
• Maximum depth of cut of 15.7 mm (0.618 inches) per pass
• Accepts four R390-17 series indexable inserts, screw-clamped for positive retention
• Through-coolant channels direct fluid to the cutting zone for improved chip evacuation and insert life
• Ramping capable, allowing helical and ramp entry without a separate drilling operation
• Maximum spindle speed of 22,700 RPM supports high-speed finishing and roughing strategies
• Steel tool body on a 1.25-inch Weldon flat shank for use in standard side-lock toolholders

Compatibility

Compatible with R390-17 series indexable inserts (insert designation R390-17..). Designed for use with standard 1.25-inch Weldon flat side-lock toolholders. Part of the CoroMill 390 system platform.

Installation Notes

Installation is performed by qualified CNC machinists or tooling setup technicians. Ensure the machine spindle is fully stopped and locked out before loading or unloading the tool body. Seat the Weldon flat shank fully into a matched side-lock holder and torque the set screw to the toolholder specification. Confirm insert seating and screw torque before initiating any cutting cycle; loose inserts present a serious safety hazard at high RPM.