Accupro 12183546 Corner Radius End Mill 3/8 in 4 Flute Altin

Product Description

The ACCUPRO 12183546 is a solid carbide corner radius end mill designed for precision milling of ferrous and hard alloy materials. It carries a 3/8 inch diameter, a 1 inch length of cut, and a 0.045 inch corner radius that reduces stress concentration at the cutting edge. The micrograin carbide substrate paired with an AlTiN coating handles elevated cutting temperatures and extends tool life in demanding applications. With four flutes and a 40-degree right-hand helix, this single-end, centercutting tool supports both slotting and profiling operations. It is installed by machinists and toolroom operators working on CNC machining centers and manual mills.

This end mill suits high-speed finishing and semi-finishing passes on ferrous metals, stainless steels, titanium, and hardened workpiece materials. The long-length configuration with a 4 inch overall length provides additional reach for deeper pockets and stepped-feature work. The centercutting geometry allows direct plunge entry without a pre-drilled pilot hole, simplifying multi-operation setups. The 3/8 inch shank fits standard ER and straight-bore toolholders common across most CNC and manual milling platforms.

Key Features

• 0.045 inch corner radius reduces edge chipping and improves surface finish at part corners
• AlTiN coating provides thermal resistance and extended wear life in hard and abrasive materials
• Micrograin solid carbide substrate maintains edge sharpness under high cutting loads
• 40-degree right-hand helix promotes efficient chip evacuation and smooth cutting action
• Centercutting design enables direct plunge milling without a pilot hole
• Long-length body with 4 inch OAL extends reach into deep pockets and cavities

Compatibility

Designed as a direct-fit replacement for standard 3/8 inch shank corner radius end mill toolholders used in CNC machining centers and manual milling applications requiring a 4 inch OAL long-reach configuration.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the 3/8 inch shank in a clean, properly sized collet or end mill holder and torque to the toolholder manufacturer specification. Inspect the collet bore and tool shank for chips or contamination before seating. Confirm runout with a dial indicator before beginning cuts, as excessive runout accelerates corner radius wear.