Hertel E202002002 Ball End Mill 5/16 in 4 Flute Hss

Product Description

The HERTEL E202002002 is a single-end ball end mill designed for contour milling, slotting, and profiling operations in metal fabrication and machining applications. Built from M7 high speed steel with a bright, uncoated finish, this end mill measures 0.3125 inches (5/16 inches) in cutting diameter with a 3/4 inch length of cut and a 2-1/2 inch overall length. The 4-flute, right-hand spiral configuration provides efficient chip evacuation and a smooth finish on ferrous and non-ferrous workpieces. A 30-degree helix angle balances cutting performance and tool rigidity across a range of feed rates and depths of cut.

This ball end mill is suited for use in CNC machining centers, knee mills, and manual milling machines where radius-profile cuts, 3D contouring, and pocket finishing are required. The 3/8 inch straight shank fits standard ER collet chucks and end mill holders commonly found in job shops, maintenance machining environments, and production facilities. It is a single-end tool intended for right-hand cutting operations on materials including mild steel, alloy steel, aluminum, and similar machinable metals.

Key Features

• M7 high speed steel construction for wear resistance on ferrous and non-ferrous materials
• 4 flutes with right-hand spiral flute direction for efficient chip removal
• 30-degree helix angle balances tool stiffness and cut smoothness
• Bright, uncoated finish suitable for general-purpose machining without coolant incompatibility concerns
• Single-end design with 3/8 inch shank for standard collet and end mill holder fitment
• 0.3125 inch ball nose profile for radius contouring and 3D surface finishing

Compatibility

Designed as a general-purpose replacement or direct-use ball end mill for standard 3/8 inch collet chucks and end mill holders on CNC and manual milling machines requiring a 5/16 inch ball nose tool.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully powered down and locked out before changing tooling. Seat the 3/8 inch shank fully into the collet or end mill holder and torque the retention hardware according to the machine tool manufacturer specifications. Confirm runout with a dial indicator before beginning the cut to avoid premature tool wear or workpiece damage.