Osg HP255-2677 Solid Carbide Jobber Drill Bit 6.8 Mm

Product Description

The OSG HP255-2677 is a solid carbide jobber-length drill bit designed for high-performance drilling in ferrous and hard materials. It carries a 6.8 mm (0.2677 inch) diameter, a 140-degree point angle with R-thinned web geometry, and a WD1 coating for extended tool life under demanding cutting conditions. The spiral flute configuration promotes efficient chip evacuation, and the coolant-through design supports high-feed applications in production environments. This bit is sold individually and suited for use by machinists, toolroom technicians, and CNC operators working in job shop or manufacturing settings.

The HP255-2677 is built for drilling steel, alloy steel, and cast iron in applications that include blind hole drilling, cross hole drilling, general drilling, and self-centering operations. The 5xD flute-to-diameter ratio supports deeper penetration without sacrificing chip control. The straight-cylindrical shank with an 8.00 mm shank diameter seats securely in standard drill chucks and collet holders. This bit is a strong fit for CNC machining centers and production drilling fixtures where consistent hole quality and tight diameter tolerance are required.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• WD1 coating reduces friction and extends cutting life in steel and cast iron
• 140-degree point angle with R-thinned web for reduced thrust and accurate self-centering
• Coolant-through design compatible with through-spindle coolant systems
• Regular spiral flute with tapered web for consistent chip flow in blind and cross holes
• Diameter tolerance of +0.006 to +0.021 mm for controlled fit applications

Compatibility

Designed as an OEM-style replacement or direct application drill bit for use in standard drill chucks, collet holders, and CNC spindles accepting an 8.00 mm straight-cylindrical shank. Primary workpiece material codes P and K cover steel, alloy steel, and cast iron per ISO material classification.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with cutting tool setup and CNC operation. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit. Confirm the shank is fully seated and the chuck or collet is torqued to the toolholder manufacturer specification before starting a cut. Use through-spindle or external coolant at the recommended flow rate for the workpiece material to prevent premature edge wear.