Sumitomo U103760 Jobber Drill Bit 5/8 in Solid Carbide

Product Description

The SUMITOMO U103760 is a solid carbide jobber length drill bit designed for high-performance metal cutting in demanding industrial and machining applications. It measures 5/8 inch (0.6250 inch) in diameter with an overall length of 7.6378 inches and a 135-degree split point angle for accurate self-centering entry. The TiAlCr and TiSi dual coating provides thermal resistance and wear protection at elevated cutting speeds. The straight-cylindrical shank and tapered web configuration support rigid tool holding and efficient chip evacuation. This bit is intended for installation and use by machinists, toolroom technicians, and skilled trades professionals working with CNC machining centers or manual drill presses.

The U103760 is engineered for cutting cast iron, stainless steel, carbon steel, and high-temperature alloys, corresponding to ISO workpiece material codes K, M, P, and S. Its 5xD flute-to-diameter ratio and 5.0394-inch flute length make it well suited for drilling deeper holes in production environments where tool life and hole quality are critical. The coolant-through design supports internal coolant delivery, making it effective in high-feed or extended-reach drilling operations on machining centers equipped with through-spindle coolant systems.

Key Features

• Solid carbide construction for rigidity and extended tool life in hard and abrasive workpiece materials
• TiAlCr and TiSi dual coating for high-temperature resistance and reduced flank wear
• 135-degree drill point angle for accurate entry and reduced thrust force
• Coolant-through design compatible with through-spindle coolant delivery systems
• Tapered web configuration promotes chip breaking and evacuation in deep-hole drilling
• Straight-cylindrical shank with h8 diameter tolerance for consistent tool holder fit

Compatibility

The U103760 belongs to the SUMITOMO MDW-HGS series and is suited for use in standard 5/8 inch collet chucks, hydraulic tool holders, or shrink-fit holders compatible with a straight-cylindrical shank. It is rated for cutting cast iron, stainless steel, steel, and high-temperature alloy materials (ISO codes K, M, P, S).

Installation Notes

This drill bit should be installed and operated by qualified machinists or toolroom technicians familiar with carbide cutting tool handling. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before seating the shank. Carbide tooling is brittle — avoid side loading, interrupted cuts without proper programming, or dropping the bit on hard surfaces. Verify that through-spindle coolant pressure and flow rate are within the machine and tooling specifications before engaging the cut.