Harvey Tool 27255-C3 Corner Radius End Mill 1.4mm 4fl

Product Description

The HARVEY TOOL 27255-C3 is a miniature solid carbide corner radius end mill designed for precision milling in demanding materials including steel, stainless steel, cast iron, and non-ferrous metals. The 1.4 mm (0.0550 inch) cutting diameter features a 0.01 inch corner radius and four right-hand spiral flutes, enabling both roughing and finishing operations in a single tool. An AlTiN PVD coating improves heat resistance and tool life when cutting ferrous and hard materials. The single-end, stub-standard geometry suits tight-clearance applications where a shorter flute length is preferred for rigidity.

This end mill fits into the Harvey Tool Miniature End Mills - Corner Radius - Stub and Standard series. It is suited for precision machining centers and CNC mills in job shops, tool-and-die operations, and medical or aerospace component work where small-diameter, tight-tolerance profiling is required. The 1/8 inch straight-cylindrical shank accepts standard toolholders sized for that shank diameter, and the 1.5 inch overall length keeps overhang minimal for improved rigidity in stub-style applications.

Key Features

• 1.4 mm (0.0550 inch) cutting diameter with 0.01 inch corner radius for precise edge blending and fillet milling
• AlTiN PVD coating for improved thermal resistance and extended tool life in ferrous materials
• Four right-hand spiral flutes with normal pitch support both roughing and finishing passes
• Centercutting geometry allows plunge entry without a pre-drilled pilot hole
• Solid carbide construction delivers rigidity and wear resistance at miniature diameters
• Straight-cylindrical 1/8 inch shank is compatible with standard collet-style toolholders

Compatibility

Designed for use with standard toolholders accepting a 1/8 inch straight-cylindrical shank. Suitable for milling steel, stainless steel, cast iron, non-ferrous metals, and composite materials as specified by the manufacturer.

Installation Notes

Installation and tool changes must be performed by a qualified machinist with the spindle fully stopped and machine in a safe, locked-out state. Ensure the toolholder bore and shank are clean and free of chips or burrs before seating the end mill. Confirm runout with a dial indicator before cutting, as runout is especially critical at miniature diameters. Follow machine tool manufacturer torque recommendations for the collet or toolholder used.