Mitsubishi 459487 Micro Drill Bit 1/32 in Solid Carbide

Product Description

The MITSUBISHI 459487 is a solid carbide micro drill bit engineered for very small hole drilling in demanding industrial and machining applications. It measures 1/32 inch (0.0312 inches) in diameter with a 140-degree drill point angle and features a TiAlN coating for extended tool life under high-heat cutting conditions. The overall length is 1.974 inches (50.14 mm) with a straight-cylindrical shank diameter of 0.125 inches. It is a right-hand cutting tool with a spiral flute design and X-thinning point geometry, reducing thrust and improving centering accuracy. Machinists and tooling professionals working with precision components install this bit in CNC machining centers and precision drill presses.

This micro drill bit is suited for precision drilling operations requiring tight tolerances and minimal hole diameter. It is designed primarily for steel as its primary workpiece material and is also rated for a broad range of secondary materials including alloy steel, austenitic stainless steel, hardened steel, high temperature alloys, cast iron, brass, bronze alloy, copper, copper alloy, nickel, nickel alloy, magnesium, iron alloy, soft metals, and special alloys. The coolant-through design supports high-speed machining cycles where chip evacuation and thermal management are critical. This tool is appropriate for precision component manufacturing, mold making, and medical or aerospace part drilling where very small diameter holes are required.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• TiAlN coating extends tool life in high-temperature cutting environments
• 140-degree X-thinned point reduces thrust and improves self-centering on entry
• Coolant-through design aids chip evacuation and heat dissipation during deep micro drilling
• Spiral flute geometry with parallel web configuration for consistent chip flow
• Right-hand cutting with straight-cylindrical shank for standard collet and chuck compatibility

Compatibility

Designed for use in CNC machining centers, precision drill presses, and similar equipment capable of holding a 0.125-inch straight-cylindrical shank. Rated for steel as the primary workpiece material and compatible with alloy steel, austenitic stainless steel, hardened steel, hardened materials, high temperature alloys, cast iron, brass, bronze alloy, carbon steel, copper, copper alloy, nickel, nickel alloy, magnesium, iron alloy, soft metals, and special alloys per ISO standards.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or tooling technicians familiar with micro drill bit handling procedures. Ensure the machine spindle and collet or chuck are clean and properly seated before securing the 0.125-inch shank to prevent runout. Activate coolant-through flow before starting the cut to protect the cutting edge and clear chips from the flute. Micro drill bits are fragile at this diameter — avoid side loading, use appropriate feed rates, and never exceed the rated maximum drilling depth of 0.037 inches without retracting to clear chips.