Iscar 5620991 Ball End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The ISCAR 5620991 is a solid carbide ball end mill designed for precision milling operations in demanding machining environments. With a 1/4 inch diameter and a 4-flute configuration, this single-end tool delivers smooth cutting action and efficient chip evacuation. The 30-degree helix angle promotes clean shearing, while the TiAlN coating adds heat resistance and extends tool life during high-speed or dry machining. The submicron carbide grade provides exceptional hardness and edge retention. Machinists and CNC operators working in job shops or production environments install this tool directly into standard collet or end mill holders.

This ball end mill is suited for profiling, contouring, and finishing passes on a wide range of workpiece materials. The EBSI-A-4 series stub-length geometry keeps the tool rigid during cuts, reducing deflection in tight pockets and complex 3D surface work. Material compatibility codes H, K, M, P, and S indicate suitability for hardened steels, cast iron, stainless steel, carbon steel, and heat-resistant superalloys. It is appropriate for use in both vertical and horizontal machining centers running right-hand spindle rotation.

Key Features

• 1/4 inch ball nose diameter with 0.3130 inch length of cut for controlled radial engagement
• 4-flute, right-hand cut and right-hand flute spiral geometry for efficient material removal
• TiAlN coating for elevated heat resistance and extended tool life in dry or semi-dry machining
• Submicron solid carbide grade for superior hardness and edge retention
• 30-degree helix angle reduces cutting forces and improves surface finish
• Stub-length design (Series EBSI-A-4) maximizes rigidity and minimizes deflection

Compatibility

Compatible with workpiece materials classified under codes H, K, M, P, and S, covering hardened steels, cast iron, stainless steel, carbon and alloy steels, and heat-resistant superalloys. Designed for use in standard 1/4 inch collet chucks and end mill holders on CNC vertical and horizontal machining centers.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and locked out before tool changes. Seat the 1/4 inch shank fully and evenly in the collet or holder before torquing to the holder manufacturer specification. Verify runout with a dial indicator after installation to confirm proper seating before beginning a cut.