Osg HP253-2047 Screw Machine Drill Bit 0.2047in Carbide

Product Description

The OSG HP253-2047 is a solid carbide screw machine length drill bit designed for high-performance drilling in steel, alloy steel, and cast iron. With a 0.2047-inch (5.20 mm) diameter and a 140-degree split point, this bit delivers fast penetration and accurate hole placement in demanding production environments. The coolant-through design channels cutting fluid directly to the tip, reducing heat buildup and extending tool life during high-speed or deep-hole operations. The R-thinned web reduces thrust requirements at entry, making it well suited for CNC machining centers and screw machine applications where cycle time and tool longevity matter.

This drill bit is built for professional machinists and toolroom technicians working in production machining, job shops, and maintenance environments. The screw machine length format — shorter overall length compared to jobber drills — provides added rigidity and reduced deflection, making it ideal for close-tolerance work on lathes, machining centers, and multi-spindle screw machines. Primary workpiece materials include steel, alloy steel, and cast iron. The straight-cylindrical shank is sized at 6.00 mm for direct chuck or collet mounting.

Key Features

• Solid carbide construction for superior hardness and wear resistance in ferrous materials
• 140-degree drill point angle for self-centering entry and reduced thrust
• Coolant-through capability to manage heat in high-speed or interrupted cuts
• R-thinned web reduces axial cutting force at the drill tip
• Regular spiral flute with 3xD flute-to-diameter ratio for effective chip evacuation
• Straight-cylindrical shank compatible with standard chucks and collets

Compatibility

Designed for use on steel, alloy steel, and cast iron workpieces. Part of the OSG HP253 series, covering the 0.2000 to 0.2500 inch (5.00 to 6.50 mm) diameter range. Intended for use in CNC machining centers, screw machines, lathes, and similar production drilling equipment equipped with coolant-through toolholding.

Installation Notes

Installation and tool changes should be performed by qualified machinists with the spindle fully stopped and machine power locked out per facility safety procedures. Verify chuck or collet bore matches the 6.00 mm shank diameter before seating the bit. When using the coolant-through feature, confirm that the machine tool's coolant supply pressure is compatible with the toolholder setup. Inspect the cutting edges for chipping or wear before each use, as carbide tools can fail suddenly if run with existing edge damage.