Accupro G8A43020 Ball End Mill 0.3125 in 2 Flute Carbide

Product Description

The ACCUPRO G8A43020 is a solid carbide ball end mill designed for precision milling operations in metalworking and machining applications. With a 0.3125-inch (5/16-inch) mill diameter and a 0.3125-inch length of cut, this single-end tool delivers accurate contouring, profiling, and 3D surface milling. The 2-flute geometry paired with a 30-degree right-hand helix promotes efficient chip evacuation and smooth cutting action. Manufactured from nanograin solid carbide, the G8A43020 maintains edge integrity under high-speed conditions. It is installed and operated by machinists and CNC programmers working on mills, machining centers, and similar equipment.

This ball end mill suits a wide range of milling tasks including contour milling, die and mold work, slotting, and finish passes on ferrous and non-ferrous materials. The extended reach design with a 0.625-inch reach length allows access to deeper features without requiring a longer overall tool. At 4 inches overall length with a 0.3125-inch shank diameter, it mounts into standard 5/16-inch collets or tool holders commonly found on vertical and horizontal machining centers used in job shop and production environments.

Key Features

• Nanograin solid carbide construction for extended tool life and edge stability
• 2-flute, right-hand spiral geometry promotes chip evacuation during slotting and profiling
• 30-degree helix angle balances cutting forces for smooth surface finishes
• Extended reach design with 0.625-inch reach length for deeper feature access
• Tight mill diameter tolerance of +0.0000 to -0.0006 inches for precise fitment
• Single-end configuration for straightforward tool holding and setup

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 5/16-inch collets and tool holders on CNC vertical mills, horizontal machining centers, and manual knee mills requiring a single-end ball nose carbide end mill.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully powered down and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully into the collet or tool holder to the manufacturer-recommended insertion depth and torque the retention hardware according to the tool holder specification. Verify runout with a dial indicator before initiating a cutting cycle.