Promax 119-01616 Corner Radius End Mill 1/4 in 3 Flute

Product Description

The PROMAX 119-01616 is a solid carbide corner radius end mill designed for roughing and finishing operations in a single tool. Built from micrograin carbide stock and coated with zirconium nitride (ZrN), it runs a 0.25 inch cutting diameter with a 0.02 inch corner radius on a 3-flute, right-hand geometry. The 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces across a wide range of workpiece materials. With a 0.75 inch length of cut and a 2.5 inch overall length, it fits standard toolholders used by machinists and CNC operators in job shop and production environments.

This end mill is suited for general-purpose milling on CNC machining centers and manual mills where a corner radius profile is required to reduce stress concentration at part corners or meet a blended-radius callout on the print. The 0.25 inch straight-cylindrical shank accepts standard collets and end mill holders. Its single-end, center-cutting design allows direct plunge entry and side milling without a pre-drilled pilot. The ZrN coating extends tool life when cutting non-ferrous alloys, aluminum, brass, and similar materials.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention
• ZrN (zirconium nitride) coating reduces friction and extends tool life in non-ferrous applications
• 0.02 inch corner radius blends part corners and reduces chipping risk on the tool edge
• 40-degree right-hand helix promotes chip clearance and smooth cutting action
• Center-cutting geometry allows direct plunge without a pilot hole
• Regular-length, single-end design fits standard collet and end mill holder setups

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for CNC machining centers and manual mills accepting a 0.25 inch straight-cylindrical shank with standard collet or end mill holder tooling.

Installation Notes

Installation and tool changes must be performed with the spindle fully stopped and the machine in a locked-out state per shop safety procedures. Seat the shank fully into the collet or holder and torque the retention nut to the toolholder manufacturer specification. Verify runout with a dial indicator before running production cuts. Feeds, speeds, and depth-of-cut parameters should be set based on the workpiece material and machine capability - do not exceed the rated length of cut of 0.75 inches axially.