Hertel 44839454 Roughing End Mill 5/16 in 3 Flute Cobalt

Product Description

The HERTEL 44839454 is a single-end roughing end mill designed for aggressive material removal in milling operations. Made from M42 cobalt high-speed steel with a bright, uncoated finish, this tool handles tough ferrous and non-ferrous materials where standard HSS tooling falls short. The 5/16 inch (0.313 inch decimal) mill diameter pairs with a 7/16 inch length of cut and a 3/8 inch shank diameter. Three right-hand flutes in a coarse pitch geometry break chips efficiently during heavy roughing passes. Overall length is 2-3/16 inches. This end mill is not center-cutting and is intended for peripheral roughing rather than plunge entry.

This end mill is suited for job shop, tool room, and production floor applications involving steel, stainless, and other difficult alloys where heat resistance and edge strength are priorities. The M42 cobalt grade provides improved red hardness over standard M2 HSS, making it a practical choice when running higher surface footage or cutting harder workpiece materials. It is a single-end tool with a right-hand cutting direction and right-hand flute spiral, used in standard right-hand spindle milling machines, VMCs, and manual knee mills.

Key Features

• M42 cobalt steel construction for improved hardness and heat resistance over standard HSS
• Coarse pitch, 3-flute geometry promotes efficient chip evacuation during roughing cuts
• Bright, uncoated finish suitable for a wide range of workpiece materials
• Right-hand cut and right-hand flute direction for standard spindle compatibility
• 3/8 inch shank diameter fits common ER and straight-bore collet chucks
• Not center-cutting — designed for peripheral roughing, not plunge milling

Compatibility

Designed as a standard-shank roughing end mill compatible with milling machines, machining centers, and CNC mills equipped with 3/8 inch collet or end mill holders accepting right-hand tooling.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Secure the shank fully within the collet or holder to the manufacturer-recommended engagement depth before tightening. Ensure the spindle is fully stopped and the machine is powered down before tool changes. Do not use this tool for plunge cuts, as it is not center-cutting.