Mitsubishi 10531877 Micro Drill Bit 0.0860 in Carbide

Product Description

The MITSUBISHI 10531877 is a solid carbide micro drill bit designed for very small hole drilling in demanding production environments. It measures 0.0860 inches (2.18 mm) in diameter with a 140-degree drill point angle and a TiAlN coating that extends tool life in high-temperature cutting conditions. The X-thinned point geometry reduces thrust force and improves chip evacuation. Overall length is 2.929 inches (74.40 mm). This bit belongs to the MVS Series and is intended for use by machinists and CNC operators working with tight-tolerance small-diameter holes.

This drill bit is suited for use in CNC machining centers and drilling operations requiring precise micro-hole production. Its coolant-through design supports high-pressure internal coolant delivery, making it appropriate for deep-hole drilling relative to diameter. The 7xD flute-to-diameter ratio allows drilling to a maximum depth of 0.618 inches (15.70 mm). It is well-matched to production shops drilling steel, stainless steel, aluminum, cast iron, brass, copper, carbon steel, hardened steel, superalloys, and titanium.

Key Features

• Solid carbide construction for rigidity and wear resistance in micro drilling
• TiAlN coating improves heat resistance and extends cutting tool life
• X-thinned point reduces thrust and improves centering on entry
• Coolant-through design supports internal high-pressure coolant delivery
• 140-degree drill point angle optimized for steel and hard material entry
• Straight-cylindrical shank fits standard collet and chuck toolholding

Compatibility

Designed as an OEM-style replacement or direct-use tool for MVS Series micro drilling applications conforming to ISO standards, with a 3.00 mm straight-cylindrical shank compatible with standard collet systems accepting that shank diameter.

Installation Notes

Installation and use should be performed by qualified machinists familiar with CNC toolholding and small-diameter drill practices. Ensure the machine spindle and toolholder are clean and free of runout before seating the straight-cylindrical shank. Micro drill bits are sensitive to misalignment — verify runout does not exceed recommended tolerance for the diameter class before cutting. Enable coolant-through supply when drilling at maximum depth to prevent chip packing and bit breakage.