Accupro 311373 Square End Mill 3/16 in 5 Flute Solid Carbide

Product Description

The ACCUPRO 311373 is a 5-flute solid carbide square end mill designed for high-performance metal cutting in demanding machining applications. It carries a 3/16 inch (0.1875 inch) cutting diameter and a 5/16 inch length of cut. The tool features a 38-degree helix angle and an AlTiCrN coating, which improves heat resistance and extends tool life in hard and abrasive materials. Variable index flute spacing reduces harmonic vibration during cutting. This is a single-end, right-hand cutting, right-hand spiral tool built from micrograin carbide stock. Machinists and CNC operators working in job shops or production environments will find it suited to finishing and semi-finishing passes at elevated surface speeds.

The 311373 is suited for milling ferrous and hardened materials where thermal stability and edge retention are priorities. Its compact 3/16 inch diameter and 2 inch overall length make it well matched to tight-tolerance features, slots, and pockets in small workpieces. The centercutting geometry allows plunge entry. It is typically used in vertical machining centers and CNC mills where high-RPM spindle speeds and rigid setups are available. The HS series designation places it in a high-speed application range appropriate for steel, stainless, titanium, and similar alloys.

Key Features

• AlTiCrN coating for elevated heat resistance and extended tool life in hard materials
• 5-flute design improves chip load distribution and surface finish quality
• 38-degree helix angle promotes smooth cutting action and efficient chip evacuation
• Variable index flute spacing reduces chatter and vibration during aggressive cuts
• Centercutting geometry allows direct plunge entry into workpiece material
• Micrograin solid carbide construction provides hardness and wear resistance

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for CNC machining centers and manual mills accepting a 3/16 inch straight shank.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Secure the shank fully into a collet or end mill holder and torque the retention mechanism according to the toolholder manufacturer specifications before spindle operation. Confirm runout at the cutting diameter with a dial indicator before beginning a production run. Always power down and lock out the spindle before changing or inspecting tooling.