Accupro 12277163 Ball End Mill 0.038 in 4 Flute Carbide

Product Description

The ACCUPRO 12277163 is a solid carbide ball end mill designed for precision milling in tight-tolerance and miniature machining applications. Built from micrograin solid carbide, it delivers the hardness and edge retention needed for cutting ferrous and non-ferrous materials at small diameters. The mill measures 0.0380 inches in diameter with a 0.0570-inch length of cut (LOC), a 1/8-inch shank diameter, and a 1-1/2-inch overall length (OAL). The 4-flute geometry with a 30-degree right-hand helix promotes efficient chip evacuation and surface finish quality in finish and semi-finish passes.

This end mill is suited for CNC milling operations requiring small-diameter tooling, including die and mold work, engraving, micro-slot cutting, and detailed contouring on machining centers. The miniature series designation makes it appropriate for tight-clearance workpieces where standard-sized tooling cannot reach. It is a single-end tool with right-hand cutting direction. Machinists, tool and die makers, and CNC operators working in job shops or production environments are the primary users of this tool.

Key Features

• Micrograin solid carbide construction for improved wear resistance and edge stability at small diameters
• 0.0380-inch mill diameter with a tight tolerance of +0.0000 / -0.0010 inches for precise fitment
• 4-flute spiral design with 30-degree right-hand helix for efficient chip flow and smoother surface finish
• Bright/uncoated finish suitable for a broad range of workpiece materials without coating compatibility concerns
• 1/8-inch shank diameter with shank tolerance of -0.0001 / -0.0003 inches for secure collet holding
• Single-end, no chipbreaker configuration for straightforward use in standard CNC collet setups

Compatibility

Designed as an OEM-style miniature series solid carbide ball end mill compatible with CNC machining centers and manual mills equipped with 1/8-inch collet toolholders.

Installation Notes

Installation and tool changes should be performed by qualified machinists or CNC operators with the machine powered down and all axes at rest. Use a properly sized 1/8-inch precision collet or toolholder to ensure runout is minimized at this diameter. Verify collet and holder are clean and free of debris before seating the shank. Follow the machine manufacturer and tooling supplier recommended speeds and feeds for the workpiece material and do not exceed the tool's rated cutting diameter.