Sumitomo U101065 Screw Machine Drill Bit 15/64 Solid Carbide

Product Description

The SUMITOMO U101065 is a screw machine length drill bit engineered for high-performance drilling in demanding metalworking applications. Built from solid carbide with a coated finish, this bit measures 15/64 inch (0.2344 inches) in diameter and features a 135-degree split point for accurate, self-centering entry without a center punch. The overall length is 3.2283 inches with a flute length of 1.1811 inches and a straight-cylindrical shank. Coolant-through design supports through-spindle coolant delivery, keeping cutting edges cool during high-speed production runs. Intended for installation and use by machinists and CNC operators working in job shop and production environments.

This drill bit is suited for screw machine applications in both manual and CNC setups where short overall length and rigidity are required. Primary workpiece materials include cast iron, stainless steel, and steel. The MDW-HGS series designation identifies this as part of a coordinated line of solid carbide drills sized for screw machine length requirements. It is well matched to production environments where tool consistency and bore accuracy across high cycle counts are priorities.

Key Features

• Solid carbide construction with coated finish for extended tool life in ferrous materials
• 135-degree drill point angle for self-centering entry and reduced thrust force
• Coolant-through design compatible with through-spindle coolant systems
• Straight-cylindrical shank with h8 diameter tolerance for precise chuck or collet fit
• Tapered web configuration with 2 flutes and 2 margins for chip evacuation and bore quality
• 3xD flute-to-diameter ratio; maximum drilling depth of 0.8300 inches

Compatibility

Designed as a screw machine length solid carbide drill for use in cast iron, stainless steel, and steel workpieces; fits standard straight-shank drill chucks and collet systems accepting a 0.2344-inch diameter shank.

Installation Notes

This drill bit is installed by machinists or CNC setup technicians into a compatible drill chuck or precision collet. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify that the machine tool is configured for through-spindle coolant if that feature is to be used. Handle solid carbide tooling carefully to avoid chipping the cutting edges during setup and storage.