Sumitomo U101137 Mechanics Drill Bit 23/64 in Carbide

Product Description

The SUMITOMO U101137 is a solid carbide mechanics-length drill bit engineered for high-performance drilling in demanding metalworking applications. It features a 135-degree split-point geometry that reduces walking and cutting force at entry, paired with a dual-layer TiAlCr/TiSi coating that improves heat resistance and extends tool life at elevated cutting speeds. The bit measures 23/64 inch (0.3594 inch decimal) in diameter with an overall length of 3.8583 inches and a flute length of 2.1654 inches. Machinists and toolroom professionals use this bit where precision, rigidity, and coating performance are required in production drilling environments.

This drill bit is rated for use in a broad range of primary workpiece materials, including cast iron, non-ferrous metals, stainless steel, and general steel. Its mechanics-length flute geometry provides added rigidity over jobber-length bits, making it well suited for CNC machining centers, drill presses, and manual machines where bore accuracy and reduced deflection are priorities. The tapered web configuration supports chip evacuation across the supported material groups.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• TiAlCr/TiSi dual-layer coating enhances heat resistance and extends tool life
• 135-degree point angle reduces thrust force and minimizes bit walking on entry
• Tapered web configuration promotes efficient chip evacuation
• Mechanics-length design provides greater rigidity compared to jobber-length drills
• Compatible with cast iron, non-ferrous metals, stainless steel, and carbon steel workpieces

Compatibility

Designed for use in cast iron, non-ferrous metal, stainless steel, and steel workpieces. Applicable to MDW-GS4 series tooling setups in CNC and manual drilling applications.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or toolroom technicians familiar with carbide tooling requirements. Secure the shank firmly in a compatible chuck or collet rated for the 0.3594-inch shank diameter before operation. Solid carbide tooling is brittle and should not be subjected to side loads or interrupted cuts beyond its rated capacity. Always follow machine manufacturer guidelines for spindle speed and feed rate when running carbide drills in production environments.