Harvey Tool 27240-C3 Corner Radius End Mill 0.04in 4 Flute

Product Description

The HARVEY TOOL 27240-C3 is a miniature solid carbide corner radius end mill designed for high-precision milling in tight-tolerance applications. Built on a 0.04-inch diameter with a 0.01-inch corner radius and four helical flutes, this single-end tool handles both roughing and finishing passes in a single setup. The AlTiN PVD coating provides heat resistance and extended tool life when cutting ferrous and non-ferrous materials. With a 30-degree helix angle and right-hand cutting direction, it delivers efficient chip evacuation in demanding CNC machining operations. This tool is installed and run by machinists and tool-and-die professionals working on precision components.

The 27240-C3 is suited for milling steel, stainless steel, cast iron, non-ferrous metals, and composite materials. Its stub and standard miniature form factor makes it well-matched for detailed profiling, slot milling, and contouring work where small-diameter tooling is required. The 1/8-inch straight cylindrical shank seats directly into compatible toolholders without adapters, making it a practical choice for micro-machining setups on vertical machining centers and CNC routers handling small, intricate parts.

Key Features

• 0.04-inch mill diameter with tight tolerance of 0.0005 to -0.0005 inches for precision fitment
• 0.01-inch corner radius with tolerance of 0.0010 to -0.0010 inches
• AlTiN PVD coating for heat resistance and extended tool life in ferrous materials
• 4-flute helical design supports both roughing and finishing in a single tool
• Center-cutting capable — plunge milling entry without pre-drilled pilot holes
• Right-hand flute direction and right-hand cutting for standard CNC spindle compatibility
• No chipbreaker, no variable helix, no coolant-through — straightforward solid carbide construction

Compatibility

Designed for use with standard toolholders accepting a 1/8-inch straight cylindrical shank. Fits within the HARVEY TOOL Miniature End Mills - Corner Radius - Stub and Standard series.

Installation Notes

Installation is performed by a machinist or CNC tooling technician. Confirm the toolholder collet is sized for a 1/8-inch shank and that runout is within acceptable limits before engaging the workpiece. Power down and lock out the spindle before inserting or removing the tool. Given the 0.04-inch diameter, avoid excessive overhang and verify feeds and speeds are dialed for the workpiece material to prevent tool breakage.