Sumitomo U101044 Solid Carbide Screw Machine Drill Bit

Product Description

The SUMITOMO U101044 is a solid carbide screw machine length drill bit designed for high-precision drilling in ferrous materials. Measuring 0.189 inches (4.80 mm) in diameter, it features a 135-degree split-point geometry and a tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank seats securely in standard drill chucks and collets. With an overall length of 2.5591 inches and a flute length of 0.9843 inches, this bit is built for stub-length rigidity and accuracy. It is installed and used by machinists, maintenance technicians, and trade professionals working in production or field environments.

This drill bit is suited for drilling into cast iron and steel in applications where hole location accuracy and tool life are priorities. The screw machine length format provides added stiffness compared to jobber-length bits, making it well suited for CNC machining centers, drill presses, and hand-held operations where deflection must be minimized. The MDW-GS series is engineered for consistent performance in moderate to high-volume drilling tasks on ferrous workpieces.

Key Features

• Solid carbide construction for extended tool life in ferrous materials
• 135-degree drill point angle reduces thrust and improves self-centering
• Tapered web configuration aids chip evacuation and reduces heat buildup
• Screw machine length design provides superior rigidity over standard jobber bits
• Straight-cylindrical shank compatible with standard chucks and collets
• 2xD flute-by-diameter ratio for efficient chip removal at moderate drilling depths

Compatibility

Designed as a replacement-style solid carbide drill bit for use in cast iron and steel applications within the 0.1500 to 0.2000 inch (3.50 to 5.00 mm) diameter range, as specified for the MDW-GS series.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cutting tool handling and machine tool operation. Ensure the machine spindle is fully stopped and powered down before changing or seating the bit. Inspect the shank and chuck or collet for debris before installation to maintain runout tolerances. Solid carbide tooling is brittle and should not be used in conditions with excessive vibration or interrupted cuts beyond the tool's design parameters.