Seco 00040022 Indexable Ball Nose End Mill 3/4 in

Product Description

The SECO 00040022 is an indexable ball nose end mill designed for milling operations requiring precise, high-quality curved surface finishes. Built on the R218.20 toolholder platform, it accepts two 218.20-0.375.R inserts secured by screw-type clamping. The 3/4-inch cutting diameter and 2-flute configuration suit a wide range of milling tasks, including profiling, contouring, and ramping up to 45 degrees. Through-coolant capability supports higher feed rates and extended insert life by delivering coolant directly to the cutting zone. The 1-inch Weldon Flat shank ensures positive drive and minimal slip in compatible holders.

This end mill is suited for use in CNC machining centers and manual mills performing milling work on ferrous and non-ferrous materials. The through-coolant design makes it well suited for deeper pockets and longer cuts where heat and chip evacuation are primary concerns. It is intended for use by machinists, toolroom technicians, and CNC operators working in production or job-shop environments. The maximum rated spindle speed of 20,200 RPM allows use across a broad range of machine configurations.

Key Features

• 3/4-inch cutting diameter with a maximum depth of cut of 0.66 inches
• Accepts two 218.20-0.375.R indexable inserts held by screw clamping
• Maximum ramping angle of 45 degrees for aggressive plunge and ramp milling
• Through-coolant design for improved chip evacuation and thermal control
• 1-inch Weldon Flat shank for positive drive retention
• Rated to 20,200 RPM for high-speed machining applications

Compatibility

Designed for use with 218.20-0.375.R inserts on the R218.20-Inch series toolholder platform. Requires a 1-inch Weldon Flat-style tool holder. Insert seating is compatible with screw-type insert clamping only.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the spindle fully stopped and machine control in a locked-out state before tool changes. Ensure the Weldon Flat shank is fully seated and the set screw is tightened against the flat to prevent axial pullout. Confirm insert seating and screw torque per the insert manufacturer's guidelines before running. Verify coolant passage is clear and coolant supply is active before engaging through-coolant-dependent cuts.