Mitsubishi 10544044 Carbide Extra Length Drill Bit 1/4 in

Product Description

The MITSUBISHI 10544044 is a solid carbide extra length drill bit designed for demanding metal-cutting applications where standard-length tooling cannot reach. Built on the MVS Series platform, this bit features a TiAlN coating, a 140-degree drill point angle with X-Thinning geometry, and a helical right-hand flute configuration. The cutting diameter is 0.2500 inches (6.35 mm), the flute length is 5.9530 inches, and the overall length is 8.1560 inches, giving it a flute-to-diameter ratio of 20xD. Maximum drilling depth reaches 5.0470 inches. The cylindrical shank measures 0.315 inches in diameter and 2.0870 inches in length. This tool weighs 0.14 pounds and is sold individually.

This drill bit is suited for deep hole drilling, cross hole drilling, stack drilling, and standard through-hole operations in a wide range of workpiece materials. Its 20xD reach and parallel web configuration make it well matched to production environments where hole depth or stack thickness exceeds the capacity of standard-length drills. Rated for right-hand cutting, it is intended for use in CNC machining centers, drill presses, and similar powered spindle equipment operated by machinist and tooling professionals.

Key Features

• 0.2500 inch (6.35 mm) cutting diameter with 140-degree X-Thinned point for reduced thrust and clean entry
• TiAlN coating improves heat resistance and tool life in steel, stainless, and superalloy cutting
• 20xD flute-to-diameter ratio and 5.0470 inch maximum drilling depth for deep hole and stack drilling
• Coolant-through design supports internal coolant delivery to extend tool life and clear chips at depth
• Helical right-hand flutes with parallel web configuration for consistent chip evacuation
• Cylindrical shank at 0.315 inches diameter for compatibility with standard collets and drill chucks

Compatibility

Designed for use in applications involving steel, stainless steel, superalloys, titanium, structural steel, tempered steel, hardened steel, cast iron, carbon steel, bronze, high strength bronze, brass, copper, aluminum, and aluminum alloy workpiece materials. Conforms to ISO specification designation. Verify spindle speed and feed rate compatibility with machine tool specifications before use.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully powered down and locked out per applicable machine safety procedures. Secure the cylindrical shank in a properly sized collet or drill chuck to the tool holder manufacturer's specified clamping method before operation. When using the coolant-through feature, confirm that coolant pressure and flow rate are within the machine tool and toolholder specifications. Do not exceed the 5.0470 inch maximum drilling depth rating for this tool.