Sumitomo 5UHY207 Solid Carbide Jobber Drill Bit 8.5 Mm

Product Description

The SUMITOMO 5UHY207 is a solid carbide jobber-length drill bit designed for precision metal cutting in demanding production and maintenance machining environments. Sized at 8.5 mm (0.3346 inches) in diameter with a 135-degree split-point tip, this bit drives through cast iron and steel with reduced walking and minimal entry burr. The TiAlCr and TiSi dual-coating system extends tool life in high-heat cutting conditions. With an overall length of 98 mm (3.86 inches) and a flute length of 53 mm (2.09 inches), the 5UHY207 belongs to the MDW-GS series and is built for use in CNC machining centers, drill presses, and automated production lines.

This drill bit is engineered for metal cutting applications in both production and repair shop settings. Primary workpiece materials are cast iron and steel, making it suitable for fabrication, maintenance machining, and toolroom work. The straight-cylindrical shank at 9 mm (0.3543 inches) diameter seats cleanly in standard drill chucks and collet holders. The 4xD flute-to-diameter ratio supports chip evacuation in deeper drilling passes. Licensed machinists, toolroom operators, and CNC technicians are the typical end users for this class of solid carbide tooling.

Key Features

• Solid carbide construction for high rigidity and wear resistance in metal cutting
• 135-degree drill point angle reduces thrust force and minimizes workpiece walking on entry
• TiAlCr and TiSi dual coating improves heat resistance and extends cutting edge life
• 4xD flute-to-diameter ratio supports efficient chip evacuation in deeper holes
• Tapered web configuration reduces cutting resistance through the full depth of cut
• h8 diameter tolerance ensures consistent, repeatable hole sizing

Compatibility

Designed for use in cast iron and steel workpiece applications as part of the SUMITOMO MDW-GS series. Fits standard drill chucks and collet holders that accept a 9 mm straight-cylindrical shank.

Installation Notes

This tooling is installed and operated by qualified machinists or CNC technicians. Secure the shank fully in a properly sized collet or drill chuck before operation and verify runout with a dial indicator before production runs. Ensure the machine spindle is fully stopped before tool changes. Solid carbide tooling is brittle and should not be used in hand-held drilling applications or in setups with excessive vibration or side load.