Osg HP255-5512 Carbide Jobber Drill Bit 14mm 140deg

Product Description

The OSG HP255-5512 is a solid carbide jobber-length drill bit designed for high-performance drilling in ferrous materials. It carries a 14 mm diameter, a 140-degree drill point angle with R-thinned web geometry, and OSG WD1 coating for wear resistance and heat management. The overall length is 124 mm with a 77 mm flute length, a straight-cylindrical shank, and a right-hand spiral flute configuration. Machinists and tool-room professionals use this bit in CNC machining centers and rigid drilling setups where tight diameter tolerances and consistent hole quality are required in production environments.

The HP255-5512 is suited for drilling steel, alloy steel, and cast iron in both blind-hole and through-hole applications. The 5xD flute-to-diameter ratio and regular spiral geometry support chip evacuation in deeper cuts. Coolant-through capability makes this bit well matched for high-speed operations where thermal management is critical. Tool application coverage includes blind holes, cross holes, standard drilling, and self-centering starts. The diameter tolerance of plus 0.007 to plus 0.025 mm supports close-tolerance work common in precision machined components.

Key Features

• 14 mm diameter with plus 0.007 to plus 0.025 mm tolerance for close-tolerance hole quality
• 140-degree R-thinned point for self-centering entry and reduced thrust force
• WD1 coating provides wear resistance in steel and cast iron applications
• Coolant-through design supports high-speed, thermally demanding operations
• 5xD flute ratio with regular spiral geometry for effective chip evacuation
• Straight-cylindrical shank for compatibility with standard collets and chucks

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces as indicated by primary workpiece material codes P and K. Suited for CNC machining centers and rigid drilling setups that support coolant-through tooling and accept 14 mm straight-cylindrical shanks.

Installation Notes

Installation and setup should be performed by a qualified machinist or tooling specialist. Secure the shank fully in a collet, chuck, or tool holder rated for the intended RPM and feed rate before operation. Verify coolant-through lines are properly connected and flowing before running the spindle. Inspect the cutting edges for wear or chipping before each use and replace the bit if edge integrity is compromised.