Seco 02789785 High-feed End Mill 1-1/4 in 4 Flute

Product Description

The SECO 02789785 is an indexable high-feed end mill designed for aggressive milling operations where high material removal rates are the priority. Built around the R217.21 toolholder style, this end mill accepts four LP06 inserts secured by screw clamping. It carries a maximum cutting diameter of 1.25 inches, a shank diameter of 1.25 inches, and a maximum depth of cut of 0.03 inches per pass — geometry optimized for high-feed, shallow-depth strategies that keep spindle load manageable at elevated feed rates. Through-coolant capability supports chip evacuation and thermal control at the cutting zone. Installed by machinists and CNC operators in metalworking and manufacturing environments.

This tool is suited for high-feed face milling and pocket roughing applications on machining centers where the R217.21 platform is in use. The 1.25-inch cylindrical shank fits standard tool holders accepting that bore diameter. With a maximum spindle speed of 27,000 RPM and a four-flute, four-insert configuration, it performs reliably in high-throughput production environments as well as job-shop applications requiring fast material removal with controlled cutting forces. The maximum ramping angle of 4.90 degrees allows helical entry into pockets without dedicated plunge tools.

Key Features

• R217.21 toolholder style accepts four LP06 indexable inserts secured by screw clamp
• Maximum cutting diameter of 1.25 inches with a minimum cutting diameter of 0.91 inches
• Maximum depth of cut of 0.03 inches optimized for high-feed, low-engagement milling strategies
• Through-coolant delivery for chip evacuation and cutting-zone temperature management
• Maximum spindle speed of 27,000 RPM supports high-throughput production runs
• Maximum ramping angle of 4.90 degrees enables helical interpolation entry into closed pockets

Compatibility

Compatible with LP06 series indexable inserts. Designed for use with the R217.21 toolholder platform on machining centers equipped with tool holders accepting a 1.25-inch cylindrical shank.

Installation Notes

Installation and tool changes should be performed by qualified machinists or CNC tooling personnel with the spindle fully stopped and the machine in a safe, locked-out state. Confirm tool holder bore diameter and clamping torque specifications per the machine tool manufacturer guidelines before mounting. Insert seating surfaces should be clean and free of chips before indexing or replacing LP06 inserts. Verify programmed feed rates and spindle speeds do not exceed the stated maximums for the insert grade in use.