Osg HP255-2835 Solid Carbide Jobber Drill 7.20 Mm

Product Description

The OSG HP255-2835 is a solid carbide jobber-length drill bit engineered for high-performance drilling in ferrous materials. It features a 7.20 mm (0.2835 inch) diameter, a 140-degree point angle with R-thinned web geometry, and a WD1 coating designed to extend tool life in demanding applications. The two-flute spiral design runs in a right-hand cutting direction with a regular spiral type, and the tapered web configuration supports chip evacuation in both through and blind hole work. Coolant-through capability makes this bit well suited for high-feed, high-speed programs on CNC machining centers and automated drilling equipment. Machinists and tooling specialists working in production environments are the primary users.

The HP255-2835 is rated for use in steel, alloy steel, and cast iron, covering ISO material codes P and K. Its 5xD flute-to-diameter ratio gives it the reach needed for deeper holes while maintaining rigidity. Typical applications include blind hole drilling, cross-hole operations, standard drilling, and self-centering entry cuts. The straight-cylindrical shank at 8.00 mm fits standard ER collets and drill chucks used on machining centers, CNC lathes, and drill presses. This bit is a direct fit for shops running the OSG HP255 series tooling program.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• WD1 coating extends tool life when drilling steel and cast iron
• 140-degree point angle with R-thinned web reduces entry thrust and improves self-centering
• Coolant-through design supports high-speed, high-feed CNC drilling programs
• 5xD flute length ratio provides depth capability while maintaining stability
• Straight-cylindrical 8.00 mm shank fits standard ER collets and drill chucks

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces (ISO material codes P and K). Fits standard ER collets and drill chucks accepting an 8.00 mm straight-cylindrical shank. Part of the OSG HP255 series for high-performance drilling applications.

Installation Notes

Installation and tool changes should be performed by qualified machinists or tooling technicians with the machine in a locked-out, zero-energy state per applicable machine safety standards. Verify collet or chuck runout before use, as excessive runout accelerates carbide wear and increases breakage risk. Coolant-through setups require confirmed coolant pressure and flow at the spindle before starting the cut. Do not use this bit as a hand-drill tool — it is intended for rigid, machine-held applications only.