Accupro 12276938 Ball End Mill 0.0450 in 4 Flute Carbide

Product Description

The ACCUPRO 12276938 is a miniature solid carbide ball end mill designed for precision milling operations in tight geometries and small-feature work. With a 0.0450-inch cutting diameter and a 0.1350-inch length of cut, this tool is built for contouring, slotting, and profiling in hardened steels, stainless, aluminum, and other demanding materials. The micrograin carbide construction provides the rigidity and edge retention required at this diameter. Four spiral flutes in a right-hand cut, right-hand helix configuration at 30 degrees promote chip evacuation and surface finish quality. Machinists and tool-and-die professionals working on molds, dies, and precision components rely on this class of tool for fine detail work.

The 12276938 is suited for CNC machining centers and high-speed spindle applications where small-diameter work demands consistent tolerances. The 1/8-inch shank allows direct mounting in standard collets and tool holders common to vertical machining centers and micro-milling setups. It is a single-end tool from the ACCUPRO Miniature series, positioned for short-run precision work and prototype machining where dimensional accuracy at the cutting edge is critical. The bright uncoated finish makes it suitable for non-ferrous materials and applications where coating buildup or edge geometry alteration from coating thickness is a concern.

Key Features

• 0.0450-inch ball nose cutting diameter with mill diameter tolerance of +0.0000 / -0.0010 inches for predictable finishes
• Micrograin solid carbide construction for edge retention and rigidity at small diameters
• 4-flute spiral geometry with 30-degree right-hand helix for effective chip evacuation
• 1/8-inch shank diameter with tight shank tolerance of -0.0001 / -0.0003 inches for secure collet engagement
• Bright uncoated finish — compatible with non-ferrous metals, aluminum, and plastics
• Single-end miniature series design for fine detail contouring and small-feature milling

Compatibility

Designed for use in CNC machining centers and high-speed micro-milling spindles accepting a 1/8-inch shank. Part of the ACCUPRO Miniature series for small-diameter precision milling applications.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Secure the shank fully within the collet or tool holder to the recommended gauge-line depth before tightening — never grip on the flute length. Verify runout with a dial indicator before cutting, as runout is especially critical at this diameter. Consult machine manufacturer guidelines for spindle speed and feed rate parameters appropriate to the workpiece material and depth of cut.