Osg HP255-5315 Solid Carbide Jobber Drill Bit 13.5 Mm

Product Description

The OSG HP255-5315 is a solid carbide jobber-length drill bit designed for high-performance drilling in ferrous and hard materials. It runs a 13.5 mm diameter with a 140-degree R-thinned point that promotes self-centering and reduces thrust on entry. The WD1 coating improves wear resistance and heat dissipation during aggressive drilling cycles. With a 124 mm overall length and a 77 mm flute length, this bit handles blind holes, cross holes, and through-hole drilling at a 5xD flute-to-diameter ratio. The straight-cylindrical shank measures 14 mm for secure chuck engagement. Machinists and tool-and-die professionals working in production environments are the primary users.

This drill bit is suited for CNC machining centers, drill presses, and production drilling applications where consistent hole quality in steel, alloy steel, and cast iron is required. The regular spiral flute with tapered web and R-thinned geometry evacuates chips efficiently in both blind and through-hole configurations. The coolant-through design supports high-speed, deep-hole drilling strategies where internal coolant delivery is available, reducing heat buildup and extending tool life in demanding ferrous workpiece materials.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard ferrous materials
• WD1 coating for improved heat and abrasion resistance
• 140-degree R-thinned point for self-centering entry and reduced thrust
• Coolant-through design compatible with internal coolant delivery systems
• 5xD flute-to-diameter ratio supports deeper hole applications
• Right-hand cut, regular spiral flute for efficient chip evacuation

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces. Suitable for ISO material groups P and K. Fits any chuck or collet accepting a 14 mm straight-cylindrical shank.

Installation Notes

This tool is installed by machinists in CNC or manual drilling setups. Ensure the machine spindle and chuck are fully stopped before changing tooling. The straight-cylindrical shank requires a correctly sized chuck or collet to prevent slippage under load. When using the coolant-through feature, confirm that coolant pressure and flow rate are appropriate for the machine and material before beginning the drilling cycle.