Hertel E2051020 Square End Mill 5/16 in 4 Flute Cobalt

Product Description

The HERTEL E2051020 is a cobalt double-end square end mill designed for milling operations in metal fabrication and machining environments. With a 5/16 inch cutting diameter and 4 spiral flutes at a 30-degree helix angle, it delivers efficient chip evacuation and a smooth cutting action on ferrous and non-ferrous materials. The M42 cobalt material grade provides elevated heat resistance, making this tool suitable for harder workpiece materials where high-speed steel tools fall short. It is uncoated and right-hand cut with right-hand flute direction. Licensed machinists and CNC operators are the primary users of this tool in production and maintenance machining settings.

The E2051020 is suited for general-purpose milling tasks including slotting, peripheral milling, and profiling. The double-end configuration provides two usable cutting ends, extending tool life between replacements. Its 3/4 inch length of cut and 3-1/2 inch overall length make it appropriate for regular-reach applications in manual mills and CNC machining centers using standard toolholders with a 3/8 inch bore.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard HSS
• Double-end design provides two cutting ends per tool
• 30-degree helix angle spiral flutes promote efficient chip evacuation
• Uncoated finish suitable for use with standard cutting fluids
• Right-hand cut and right-hand flute direction for standard spindle operation
• Non-centercutting geometry — not intended for plunge cuts

Compatibility

Designed for use in standard toolholders, collet chucks, and end mill holders with a 3/8 inch bore. Fits manual knee mills and CNC machining centers configured for regular-length end mills.

Installation Notes

Installation should be performed by a qualified machinist. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully into the toolholder to the manufacturer-recommended engagement depth and torque the retention hardware according to the toolholder specification. Because this tool is non-centercutting, avoid programming direct axial plunge moves — use ramping or helical entry instead.