Mitsubishi 668078 Carbide Extra Length Drill Bit 0.2126in

Product Description

The MITSUBISHI 668078 is a carbide extra length drill bit engineered for high-performance and high-precision drilling applications in demanding trade and industrial environments. With a 0.2126 inch (5.40 mm) cutting diameter and a 140-degree drill point angle, this bit delivers aggressive, accurate entry into tough workpiece materials. The TiAlN coating provides heat and wear resistance critical for sustained performance in steel and high-strength alloys. The X-thinned point geometry reduces cutting forces and improves centering at drill entry. At 3.9764 inches overall length with a 1.7717 inch helical flute, this bit is configured for reach-critical applications. Coolant-through capability supports chip evacuation and tool life in deep-hole work. Installation and use are appropriate for machining professionals and skilled tradespeople operating CNC or manual drilling equipment.

The 668078 is suited for cross hole drilling, stack drilling, and standard through-hole drilling operations. Its primary workpiece material is steel, and it is rated for secondary use in stainless steel, superalloys, titanium, structural steel, tempered steel, iron, hardened steel, high-strength bronze, copper, cast iron, carbon steel, bronze, brass, aluminum, and aluminum alloys. The right-hand cutting and right-hand spiral configuration makes it compatible with conventional rotating spindles. The MVS series designation places this bit in a high-performance carbide platform intended for precision production and maintenance machining contexts.

Key Features

• TiAlN coating for extended tool life in steel, stainless, and high-temperature alloys
• 140-degree X-thinned drill point reduces entry force and improves hole location accuracy
• Coolant-through design supports chip evacuation and thermal management in deep-hole drilling
• 5xD flute-to-diameter ratio provides extended reach for cross-hole and stack drilling
• Helical flute geometry with parallel web configuration for consistent chip flow
• Two-flute right-hand cutting design compatible with standard CNC and manual spindles

Compatibility

Designed for use in CNC machining centers and manual drill presses where a cylindrical-shank, extra-length carbide drill bit with a 0.2362 inch shank diameter is required. Rated for steel, stainless steel, superalloys, titanium, aluminum, brass, bronze, copper, cast iron, and hardened steel workpieces per MVS series specifications.

Installation Notes

This drill bit is installed and operated by machinists and qualified tradespeople on CNC or manual drilling equipment. Ensure the spindle and workpiece are fully secured before operation. Verify that the machine tool holder is sized for the 0.2362 inch cylindrical shank and that coolant-through supply is active if using the internal coolant feature. Do not exceed the maximum drilling depth of 1.1024 inches per cycle without retracting to clear chips.