Harvey Tool 74340 Ball End Mill 0.04in 4 Flute Solid Carbide

Product Description

The HARVEY TOOL 74340 is a miniature solid carbide ball end mill engineered for precision milling in tight-tolerance applications. With a 0.0400-inch cutting diameter and a 0.1200-inch length of cut, this stub-length tool is built for stability in micro-machining operations. The four-flute, right-hand helical design with a 30-degree helix angle promotes efficient chip evacuation while maintaining surface finish quality. The bright/uncoated finish makes it suitable for a wide range of workpiece materials without the thermal limitations of some coatings. Licensed machinists and CNC tool programmers working in precision shops, mold and die, or medical device manufacturing will find this tool properly sized for fine detail work.

This end mill is designed for roughing and finishing operations on steel, stainless steel, cast iron, and non-ferrous metals. Its 0.0200-inch nose radius and single-end configuration make it a practical choice for contouring and profiling small features in CNC machining centers. The straight-cylindrical 0.1250-inch shank provides reliable toolholder grip in collet-style and precision shrink-fit chucks. The 1.5-inch overall length keeps overhang minimal, which is especially important at this diameter range where deflection and runout directly affect part accuracy and tool life.

Key Features

• 0.0400-inch cutting diameter with a diameter tolerance of plus 0.0005 / minus 0.0005 inches for tight-tolerance work
• Four right-hand helical flutes with a 30-degree helix angle for improved chip flow and surface finish
• Solid carbide construction provides rigidity and wear resistance at miniature diameters
• 0.1200-inch reach length and 0.0200-inch nose radius suited for small-feature profiling and contouring
• Bright/uncoated finish compatible with steel, stainless steel, cast iron, and non-ferrous metals
• Stub and standard series designation with single-end geometry for consistent, repeatable setups

Compatibility

Designed for use on steel, stainless steel, cast iron, and non-ferrous metals. Fits any CNC machining center or micro-milling machine equipped with a collet or precision chuck sized for a 0.1250-inch straight-cylindrical shank.

Installation Notes

Installation and operation of this tool should be performed by a qualified machinist or CNC technician. Ensure the machine spindle is fully stopped and the tool changer or spindle is locked out before loading or removing the tool. Confirm collet or chuck runout is within acceptable tolerance before cutting, as excessive runout at this diameter will accelerate tool wear and compromise part accuracy. Follow the tool manufacturer and machine builder guidelines for speeds, feeds, and depth-of-cut recommendations when programming for miniature end mills.