Osg HP253-2205 Screw Machine Drill Bit 0.2205 in Carbide

Product Description

The OSG HP253-2205 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. With a 0.2205-inch (5.60 mm) diameter and a 140-degree split point, this bit delivers fast, accurate entry without center-punching. The R-thinned web reduces thrust load and helps maintain hole location. Coolant-through construction channels fluid directly to the cutting edge, extending tool life in production environments. Two spiral flutes evacuate chips efficiently, making this bit well-suited for CNC machining centers and automated drilling operations where tool reliability and repeatability matter.

This drill bit is built for machining steel, alloy steel, and cast iron in industrial and production shop applications. The screw machine length profile — shorter than jobber length — provides added rigidity, reducing deflection and chatter in tight-tolerance drilling. The straight-cylindrical shank measures 6.00 mm, compatible with standard collet chucks and drill chucks used on CNC mills, machining centers, and drill presses. It fits the HP253 series product family and is sized in the 0.2000- to 0.2500-inch decimal inch range, covering common close-tolerance hole requirements in metal fabrication and precision machining work.

Key Features

• Solid carbide construction for high rigidity and wear resistance in ferrous materials
• 140-degree drill point angle for fast, self-centering entry on steel and cast iron
• R-thinned web reduces axial thrust and improves chip evacuation at the cutting tip
• Coolant-through design delivers fluid directly to the cutting zone for longer tool life
• Screw machine length (3xD flute ratio) provides extra rigidity versus jobber-length bits
• Coated finish improves surface hardness and heat resistance during extended drilling cycles

Compatibility

Designed for drilling steel, alloy steel, and cast iron. The 6.00 mm straight-cylindrical shank fits standard collet chucks and drill chucks on CNC machining centers, milling machines, and drill presses. Part of the OSG HP253 series, sized within the 0.2000- to 0.2500-inch decimal inch range.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or tooling technician with the machine powered down and the spindle fully stopped. Secure the shank fully within the collet or chuck to the recommended grip depth before torquing the clamping mechanism. Coolant-through tooling requires a machine spindle with internal coolant delivery to utilize the through-coolant feature. Inspect the cutting edges for chipping or wear before each use and replace the bit if damage is observed.