Sumitomo U101011 Screw Machine Drill Bit 7/64 in Carbide

Product Description

The SUMITOMO U101011 is a screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built from solid carbide with a multi-layer DEX coating, this bit delivers superior wear resistance and heat management in production environments. The 135-degree web-thinned point reduces thrust force and promotes accurate self-centering on entry. At 2.6772 inches overall length with a 0.6890-inch flute length, it is sized for stub-length rigidity in drill press, CNC machining center, and automated screw machine setups. Coolant-through capability supports chip evacuation and tool life in deep-hole applications. Installed by machinists and tool-and-die professionals in shop and production environments.

This drill bit is engineered for drilling steel, stainless steel, cast iron, and high-temperature alloys. The 3xD flute-to-diameter ratio and regular spiral flute geometry are suited for through-hole and blind-hole operations where dimensional accuracy and surface finish matter. The straight cylindrical shank with a 0.1250-inch shank diameter fits standard drill chucks and collet systems. It is commonly used in CNC machining cells, manual drill presses, and screw machine setups processing ferrous and heat-resistant workpiece materials.

Key Features

• Solid carbide construction for hardness and thermal stability in ferrous and high-temp alloy drilling
• Multi-layer DEX proprietary coating reduces friction and extends tool life
• 135-degree web-thinned point geometry for reduced entry thrust and self-centering accuracy
• Coolant-through design supports chip flushing and heat removal in deep-hole operations
• Tapered web configuration with 2 regular spiral flutes for consistent chip evacuation
• h8 diameter tolerance ensures close-fit hole quality in precision machining applications

Compatibility

Part of the SUMITOMO MDW-HGS series. Designed for use with standard straight-shank drill chucks and collet holders accepting a 0.1250-inch shank. Suitable for drilling steel, stainless steel, cast iron, and high-temperature alloys in CNC and manual machine tool setups.

Installation Notes

Installation and tool changes should be performed with the machine powered down and all spindle rotation fully stopped. Secure the straight cylindrical shank fully within the chuck or collet to the recommended grip depth before operation. Coolant-through setups require compatible toolholders with internal coolant supply passages. Follow applicable shop safety procedures and machine tool manufacturer guidelines when setting spindle speed and feed rate for carbide tooling.