Osg HP245-1378 Solid Carbide Jobber Drill 3.50 Mm

Product Description

The OSG HP245-1378 is a solid carbide jobber-length drill bit designed for high-performance drilling in steel, alloy steel, and cast iron. It measures 3.50 mm in diameter with an overall length of 66.00 mm and a flute length of 28.00 mm, giving a 5xD flute-to-diameter ratio suited for moderate-depth holes. The 140-degree point angle with R-thinned web geometry reduces thrust and promotes self-centering at entry. A WD1 coating provides wear resistance and thermal protection during aggressive feed rates. The straight-cylindrical shank measures 6.00 mm in diameter for secure chuck retention. This drill is intended for use by machinists, toolroom technicians, and maintenance professionals working on ferrous materials.

The HP245-1378 is built for applications including blind hole drilling, cross hole drilling, general drilling, and self-centering operations on steel and cast iron workpieces. Its regular spiral flute geometry and right-hand cutting direction make it compatible with conventional CNC machining centers, drill presses, and handheld power tools with appropriate chuck capacity. The tapered web configuration and R-thinned point are particularly well suited for precision entry on flat or curved ferrous surfaces without a center punch. This is a single-piece packaged drill from the OSG HP245 series, targeting production and maintenance environments where consistent hole quality in ferrous materials is required.

Key Features

• Solid carbide construction for rigidity and extended tool life in ferrous materials
• WD1 coating for improved wear resistance and heat management
• 140-degree point angle with R-thinned web for reduced thrust and self-centering entry
• 5xD flute-to-diameter ratio supports blind hole and cross hole applications
• Straight-cylindrical 6.00 mm shank fits standard drill chucks and tool holders
• Right-hand, regular spiral flute geometry compatible with conventional spindle rotation

Compatibility

Designed for drilling steel, alloy steel, and cast iron workpieces. Primary workpiece material codes P and K apply. Suitable for use in CNC machining centers, drill presses, and similar equipment accepting a 6.00 mm straight-cylindrical shank. Part of the OSG HP245 series covering the 3.00 mm to 4.00 mm diameter range.

Installation Notes

Solid carbide drill bits should be installed and removed by qualified machinists or toolroom technicians using a properly sized chuck or collet rated for the 6.00 mm shank diameter. Ensure the spindle and workpiece are fully secured before starting the cut. Carbide is brittle — avoid lateral loading, interrupted cuts without appropriate feed rate adjustments, or re-chucking with worn or damaged tool holders. Inspect the cutting edge and coating condition before each use; carbide tooling does not tolerate the same regrind cycles as high-speed steel.