Sumitomo U103700 Taper Length Drill Bit 1/4 in Mdw-hgs

Product Description

The SUMITOMO U103700 is a taper length, solid carbide drill bit in the MDW-HGS series, designed for high-performance drilling in demanding industrial and metalworking applications. It features a 135-degree split point for accurate self-starting entry and reduced thrust force. The DEX coating provides enhanced wear resistance and heat dissipation for extended tool life in difficult-to-machine materials. With a J-Flute geometry and coolant-through capability, this bit is built for high-speed, deep-hole drilling where chip evacuation and thermal management are critical. Installation is handled by machinists and CNC operators in shop environments.

This drill bit is suited for production drilling in ferrous and non-ferrous metals, including steel alloys and cast materials where dimensional accuracy is required. The MDW-HGS series targets applications demanding tight tolerances and consistent hole quality across high-volume operations. The straight cylindrical shank allows direct mounting in standard drill chucks and collet holders without additional adapters. The 8xD flute-to-diameter ratio supports deeper hole applications while maintaining rigidity and chip flow.

Key Features

• 135-degree drill point angle for accurate self-centering entry and reduced walking
• DEX coating for improved wear resistance and extended tool life in hard materials
• J-Flute geometry optimized for efficient chip evacuation in deep-hole drilling
• Coolant-through design delivers cutting fluid directly to the tip for thermal control
• Straight cylindrical shank compatible with standard collets and drill chucks
• Diameter tolerance of +0.00000 to -0.00087 inches for tight, consistent hole sizing

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide drill bit for standard straight-shank toolholders and collet systems accepting a 0.2812-inch shank diameter.

Installation Notes

This bit is installed and operated by machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and the tool is properly seated and torqued in the collet or chuck before operation. Verify coolant-through lines are connected and flow is confirmed before engaging the cut. Follow shop-specific feeds and speeds for the work material and consult the toolholder manufacturer specifications for runout tolerances.