Osg HP255-3386 Solid Carbide Jobber Drill 8.60 Mm

Product Description

The OSG HP255-3386 is a solid carbide jobber-length drill bit designed for high-performance drilling in ferrous materials. It features an 8.60 mm diameter, a 140-degree R-thinned point, and a WD1 coating for extended tool life under demanding cutting conditions. The two-flute, right-hand spiral configuration promotes efficient chip evacuation, while the tapered web and R-thinning reduce entry force and improve self-centering accuracy. With an overall length of 103.00 mm and a straight-cylindrical shank at 10.00 mm diameter, this bit fits standard drill chucks and toolholders used in CNC machining and manual drilling operations. Coolant-through capability supports high-speed applications where heat management is critical.

The HP255-3386 is suited for drilling blind holes, cross holes, and through holes in steel, alloy steel, and cast iron. Its 5xD flute-to-diameter ratio gives it reach for moderate-depth holes without sacrificing rigidity. The regular spiral type and two-flute geometry make it a practical choice for production environments where consistent hole quality and cycle time matter. Machinists and tool-and-die professionals working with P and K material groups will find this drill appropriate for a wide range of ferrous workpiece applications.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• WD1 coating extends tool life and reduces friction in steel and cast iron
• 140-degree R-thinned point improves self-centering and reduces thrust force
• Coolant-through design supports high-speed and deep-hole drilling
• 5xD flute length ratio provides reach for moderate-depth blind and cross holes
• Straight-cylindrical shank at 10.00 mm fits standard ER collets and drill chucks

Compatibility

Designed for use in CNC machining centers and drill presses accepting a 10.00 mm straight-cylindrical shank. Rated for primary workpiece materials in ISO material groups P (steel, alloy steel) and K (cast iron).

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine locked out. Ensure the shank is fully seated and properly clamped in the toolholder before operation. Verify coolant-through supply pressure and flow rate match the machine tool specifications before running at elevated feeds and speeds. Inspect the cutting edges for chipping or wear before each use, as carbide tooling can fail suddenly if run beyond service life.