Accupro 12183474 Corner Radius End Mill 1/4 in 4 Flute Carbide

Product Description

The ACCUPRO 12183474 is a solid carbide corner radius end mill designed for precision milling in metalworking and machining applications. It features a 1/4 inch mill diameter with a 0.02 inch corner radius, a 4-inch overall length, and a 1-inch length of cut. The 40-degree helix angle and 4 right-hand spiral flutes promote efficient chip evacuation and smooth cutting action. Micrograin carbide construction provides the hardness and wear resistance needed for demanding cuts in ferrous and non-ferrous materials. The bright, uncoated finish makes it straightforward to inspect for wear after use.

This end mill is suited for finish milling, profiling, and slotting operations where a controlled corner radius is required to reduce stress concentration on workpiece edges. The single-end, centercutting geometry allows plunge entry as well as lateral passes. It is commonly used in job shops, tool rooms, and production machining environments on CNC mills and manual vertical mills. The long flute classification provides extended reach for deeper pockets and step-downs compared to standard-length tooling.

Key Features

• 0.02 inch corner radius reduces edge chipping and stress risers on finished parts
• Micrograin solid carbide substrate for enhanced hardness and tool life
• 40-degree helix angle promotes aggressive chip evacuation and reduced cutting forces
• Centercutting design permits direct plunge entry without a pre-drilled hole
• Right-hand cut, right-hand flute spiral for standard CNC and manual mill spindle compatibility
• Bright, uncoated finish suitable for a wide range of base materials

Compatibility

Designed as a standard 1/4 inch shank corner radius end mill compatible with collet chucks, end mill holders, and shrink-fit toolholders accepting a 1/4 inch shank diameter.

Installation Notes

Installation and tool changes must be performed by a qualified machinist with the machine spindle fully stopped and locked out per applicable shop safety procedures. Ensure the collet or toolholder bore is clean and free of chips before seating the shank; a contaminated bore can induce runout that accelerates tool wear. Verify shank engagement depth meets the toolholder manufacturer minimum before tightening. Do not exceed the tool's rated depth of cut or feed rate for the material being machined.