Osg HP255-3976 Solid Carbide Jobber Drill 10.10 Mm

Product Description

The OSG HP255-3976 is a solid carbide jobber-length drill bit engineered for high-performance drilling in ferrous materials. It features a 10.10 mm diameter, a 140-degree R-thinned point for improved self-centering and reduced thrust, and a WD1 coating that extends tool life in demanding production environments. The straight-cylindrical shank seats securely in standard drill chucks and collets. At 118.00 mm overall length with a 71.00 mm flute length, this drill is sized for through and blind-hole work in CNC machining centers and manual drill presses. Coolant-through capability supports chip evacuation and heat control in deep-hole applications. This is a tool for machinists and tooling professionals running precision metal-removal operations.

The HP255-3976 is built for drilling steel, alloy steel, and cast iron in industrial and job-shop settings. Its 5xD flute-to-diameter ratio and regular spiral geometry suit a wide range of drilling operations including blind holes, cross holes, and self-centering entry cuts. The R-thinned web reduces chisel-edge contact and improves penetration without requiring a separate spotting operation in many setups. Applications include production drilling on machining centers where coolant-through tooling is standard and consistent hole-to-hole repeatability is required.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• WD1 coating extends tool life and reduces built-up edge in steel and cast iron
• 140-degree R-thinned point promotes self-centering and reduces entry thrust
• Coolant-through design supports chip evacuation in blind and deep-hole drilling
• 5xD flute ratio suited to blind hole, cross hole, and through-hole applications
• Straight-cylindrical shank compatible with standard ER collets and drill chucks

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces, classified under primary workpiece material codes P and K. Fits standard straight-shank toolholders and ER collet chucks accepting a 12.00 mm shank diameter. Suited for CNC machining centers and manual machines with coolant-through spindle capability.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists familiar with carbide tooling and CNC or manual drilling operations. Ensure the machine spindle and coolant system are fully powered down and depressurized before changing tooling. Seat the straight-cylindrical shank fully and evenly in the collet or chuck to the recommended grip length before tightening. Carbide tooling is brittle and should not be used in setups with excessive runout or in interrupted cuts outside the tool's rated application range.