Accupro 14556370 Corner Radius End Mill 1/4in 4 Flute

Product Description

The ACCUPRO 14556370 is a solid carbide corner radius end mill designed for precision milling in ferrous and hardened materials. It features a 1/4-inch mill diameter, a 0.01-inch corner radius, and an AlTiN+ coating that extends tool life in high-heat cutting environments. With 4 flutes, a right-hand spiral flute geometry, and a 40-degree helix angle, this end mill delivers efficient chip evacuation and smooth finishes. The centercutting design allows plunge entry. Overall length is 2 inches with a 3/8-inch length of cut. Material grade is micrograin carbide, suited for demanding cutting applications in CNC machining centers.

This end mill is used in precision machining operations on ferrous metals, stainless steel, hardened steels, and similar materials where corner protection and edge integrity are required. The stub length type makes it well suited for rigidity-critical setups with minimal overhang. It is a single-end tool with a straight cylindrical 1/4-inch shank. Typical applications include profiling, slotting, and contouring passes in production CNC environments. Machinists and tool-and-die professionals working in job shop and production settings are the primary users.

Key Features

• AlTiN+ coating provides oxidation resistance and extends tool life in high-speed and high-temperature cutting
• 0.01-inch corner radius reduces chipping and stress concentration at cutting edges
• 4-flute right-hand spiral geometry supports efficient chip flow and smooth surface finish
• Centercutting design allows direct plunge cuts without pre-drilling
• Micrograin solid carbide substrate provides hardness and wear resistance for demanding materials
• Stub length construction improves rigidity and reduces deflection in tight setups

Compatibility

Designed as an OEM-style replacement end mill compatible with standard 1/4-inch straight-cylindrical shank toolholders used in CNC machining centers and manual mills.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for tool clamping and runout tolerance. Ensure the spindle and toolholder are clean and free of debris before seating the shank. Confirm proper torque on the toolholder collet or set screw per the holder manufacturer specification before running. Verify spindle direction is set to right-hand rotation before engaging the cut.