Accupro 314551 Square End Mill 1/4 in 3 Flute Solid Carbide

Product Description

The ACCUPRO 314551 is a solid carbide square end mill designed for precision milling in ferrous and non-ferrous materials. It features a 1/4 inch cutting diameter, a 3/8 inch length of cut, and a 3-flute geometry with a 37-degree right-hand helix. The stub-length configuration keeps the tool short and rigid, reducing deflection during aggressive passes. The bright uncoated finish makes it a general-purpose choice when coating is not required or when running with cutting fluids that would benefit from bare carbide contact. A micrograin carbide grade provides the hardness and wear resistance needed for close-tolerance work on CNC machining centers and manual mills.

This end mill is suited for slotting, profiling, and peripheral milling in shop environments where a compact, rigid tool is preferred. The stub length is a common choice for shallow-cavity work and applications where maximum tool stiffness matters more than extended reach. The 1/4 inch shank diameter fits standard ER collets, end mill holders, and shrink-fit tooling in that size range. Typical users include machinists, tool and die makers, and maintenance shops running metal fabrication or prototype work.

Key Features

• Solid micrograin carbide construction for hardness and wear resistance
• 3-flute design balances chip evacuation and cutting surface contact
• 37-degree right-hand spiral helix for smooth cutting action
• Stub length reduces overhang and maximizes rigidity
• Centercutting capable — allows plunge entry into the workpiece
• Bright uncoated finish suits general-purpose dry or wet milling

Compatibility

Designed as a direct-fit replacement or standard tooling choice for any machine spindle or toolholder accepting a 1/4 inch shank end mill, including ER16 and ER20 collet systems and comparable end mill holders.

Installation Notes

A qualified machinist should install and set this end mill in a properly sized collet or toolholder before use. Ensure the shank is fully seated to the recommended gauge line and the toolholder is torqued per the holder manufacturer specification. Inspect the cutting edges for chips or damage before every use. Do not exceed the tool manufacturer recommended speeds and feeds for the material being cut.