Osg HP255-4055 Solid Carbide Jobber Drill 10.30 Mm

Product Description

The OSG HP255-4055 is a solid carbide jobber-length drill bit engineered for high-performance drilling in ferrous materials. Built on the HP255 series platform, it features a 140-degree point angle with R-thinned web geometry that reduces thrust and promotes self-centering entry. The WD1 coating extends tool life in demanding cutting conditions. At 10.30 mm in diameter with a 12.00 mm straight-cylindrical shank, this drill delivers consistent hole quality in steel, alloy steel, and cast iron. Coolant-through design supports high-speed, deep-hole applications where chip evacuation and heat management are critical.

This drill is suited for production machining environments where blind holes, cross holes, and through-hole drilling in steel and cast iron are routine. The 5xD flute-to-diameter ratio and regular spiral geometry make it a reliable choice for CNC machining centers running coolant-through programs. It is appropriate for use in automotive, die-and-mold, and general metalworking applications where tight diameter tolerances and repeatable performance are required.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard ferrous materials
• 140-degree point angle with R-thinned web for reduced thrust and self-centering entry
• WD1 coating for extended tool life in steel and cast iron
• Coolant-through channels support chip evacuation in blind and deep-hole drilling
• Diameter tolerance of +0.007 to +0.025 mm for consistent, repeatable hole sizing
• Right-hand spiral flute with regular helix for efficient chip flow

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces. Compatible with tool applications including blind hole drilling, cross hole drilling, through drilling, and self-centering entry per OSG HP255 series specifications. Straight-cylindrical shank fits standard drill chucks and collet holders sized for 12.00 mm shanks.

Installation Notes

Installation and use should be performed by a qualified machinist or CNC setup technician. Confirm spindle and tool holder are rated for the shank diameter and intended cutting speeds before mounting. Ensure coolant-through supply is active before engaging the cut when using the through-coolant feature. Inspect the cutting edge and coating condition before each use and replace the tool if chipping or coating breakdown is observed.