Sumitomo U101305 Extra Length Solid Carbide Drill Bit

Product Description

The SUMITOMO U101305 is a solid carbide extra length drill bit engineered for deep hole drilling applications in demanding industrial environments. The bit measures 0.375 inches in diameter with a 7.677-inch overall length and a 5.433-inch flute length, providing the reach required for deep-bore work. A DEX coating and tapered web configuration improve chip evacuation and cutting stability. The 140-degree drill point angle suits entry into hard and ductile materials with minimal walking. Coolant-through capability supports high-speed drilling cycles where heat and chip buildup are primary concerns. Machinists and tooling specialists working on CNC or manual drill presses will find this bit suited to precision production runs.

This bit is designed for deep hole drilling in ductile iron and hardened steel. The MDW-XHV series targets applications where a standard-length bit cannot reach the required depth and where tight diameter tolerances are critical. The straight-cylindrical shank fits standard collets and drill chucks sized for 0.394-inch shank diameters. A flute-to-diameter ratio of 12xD confirms its classification as an extra-length tool. Typical use cases include mold and die work, heavy equipment component machining, and precision part manufacturing where hole depth and positional accuracy are non-negotiable.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• DEX coating reduces friction and extends tool life in ferrous materials
• Coolant-through design channels fluid directly to the cutting edge for heat management and chip flushing
• 140-degree drill point angle for stable entry in ductile iron and hardened steel
• Tapered web configuration improves chip flow through the 5.433-inch flute length
• 12xD flute-to-diameter ratio supports drilling depths up to 5.551 inches

Compatibility

Designed as an OEM-style tooling solution in the SUMITOMO MDW-XHV series for deep hole drilling in ductile iron and hardened steel workpieces using machine tool setups with coolant-through spindle capability.

Installation Notes

Installation and use should be performed by qualified machinists familiar with carbide tooling protocols. Confirm spindle coolant-through pressure and flow rate are within the machine tool specifications before running. Secure the straight-cylindrical shank firmly in a precision collet or drill chuck to minimize runout, as carbide is brittle and sensitive to lateral loading. Inspect the cutting edges and coating for chips or wear before each use; do not run a damaged carbide bit at production feed and speed rates.