Hertel E2111020 Ball End Mill 5/16 in 2 Flute Cobalt

Product Description

The HERTEL E2111020 is a single-end cobalt ball end mill designed for precision milling operations in metal and alloy workpieces. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance needed for difficult-to-machine materials. The mill measures 0.3125 inches in diameter with a 0.75 inch length of cut and a 3.3125 inch overall length. Its 30-degree right-hand spiral helix and 2-flute geometry produce clean chip evacuation and smooth surface finishes. This is an uncoated tool intended for machinists and tool-and-die professionals working on contoured surfaces, slots, and 3D profiles.

This end mill is suited for job shops, production machining environments, and toolrooms handling ferrous and non-ferrous metals. The 0.375 inch shank fits standard collet chucks and end mill holders on vertical mills, CNC machining centers, and knee mills. The extended reach design, with a 1.75 inch reach length, allows access to deeper features without requiring a longer overall tool. Right-hand cutting direction makes it compatible with standard spindle rotation on most milling machines.

Key Features

• M42 cobalt HSS construction for elevated heat resistance in tough alloys
• Ball end geometry for profiling, contouring, and 3D surface milling
• 30-degree right-hand spiral helix for efficient chip removal
• Extended reach of 1.75 inches for deeper pocket and slot access
• Uncoated finish suitable for use with cutting fluids on a range of metals
• Single-end design with right-hand cutting direction

Compatibility

Designed as a direct-fit replacement for standard 3/8 inch shank collet chucks and end mill holders used in vertical CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom practices. Ensure the spindle is fully stopped and locked out before changing tooling. Secure the shank to the full recommended engagement depth in the collet or holder and torque the drawbar or collet nut according to the machine manufacturer specifications. Verify runout with a dial indicator before beginning a cut to avoid premature tool wear or workpiece damage.