Osg HP253-2031 Screw Machine Drill Bit 0.2031 in Carbide

Product Description

The OSG HP253-2031 is a solid carbide screw machine length drill bit designed for high-performance drilling in steel, alloy steel, and cast iron. It measures 0.2031 inches (13/64 inch, 5.16 mm) in diameter and features a 140-degree split point angle for accurate starts and reduced thrust. The straight-cylindrical shank measures 6.00 mm in diameter and fits standard drill chucks and tool holders. With coolant-through capability and a right-hand spiral flute design, this bit is built for production environments where chip evacuation and tool life matter. Licensed machinists, toolroom technicians, and CNC operators are the primary installers of this tooling.

The HP253-2031 is suited for screw machine operations, CNC machining centers, and drill press applications where short, rigid tooling is preferred over jobber-length drills. Its 3xD flute-to-diameter ratio and tapered web with R-thinning make it effective in tight setups and high-feed conditions. Primary workpiece materials include steel, alloy steel, and cast iron, making it a solid choice for general metalworking and production drilling in job shops and manufacturing facilities.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard metals
• 140-degree drill point angle reduces walking and lowers entry thrust
• Coolant-through design supports high-feed, deep-hole drilling with active chip flushing
• R-thinned tapered web improves cutting efficiency and reduces torque at entry
• Screw machine (stub) length provides extra rigidity in short-reach setups
• Right-hand spiral flute with regular helix promotes consistent chip evacuation

Compatibility

Designed for drilling steel, alloy steel, and cast iron workpieces. Fits standard straight-cylindrical shank tool holders and drill chucks accepting a 6.00 mm shank. Part of the OSG HP253 series for high-performance metal cutting applications.

Installation Notes

Install in a compatible straight-shank chuck or collet holder and verify runout before engaging the cut. Ensure coolant lines are connected and flow is confirmed before drilling if using the through-coolant feature. Inspect the cutting edge for chipping or wear before each use, as solid carbide is brittle and sensitive to side loading. Follow machine shop safety protocols and consult applicable OSHA machining standards when setting feeds and speeds.