Osg 10242005 Screw Machine Drill Bit 0.242 in Cobalt Hss

Product Description

The OSG 10242005 is a screw machine length drill bit designed for high-performance metal drilling applications. Built from cobalt high speed steel with a coated finish, it delivers strong heat and wear resistance in demanding cutting conditions. The bit features a 130-degree point angle, a 2-flute spiral configuration, and an R-thinned web for improved penetration and reduced thrust. At 0.242 inches (letter size C, 6.15 mm) in diameter with an overall length of 3-3/16 inches, this bit is suited for short-reach, high-precision drilling. Installed and used by machinists, tool-and-die techs, and maintenance professionals working with steel and alloy steel.

This screw machine length drill bit is engineered for use in steel and alloy steel workpieces where a stub-length format is preferred for rigidity and runout control. The straight-cylindrical shank fits standard drill chucks and quick-change tooling systems. Its 1-3/8-inch flute length, 3xD flute-to-diameter ratio, and tapered web configuration make it well suited for production drilling environments and CNC machining centers where tool stiffness and consistent hole quality are priorities. The Series 1000 designation places it in OSG high performance tooling.

Key Features

• Cobalt high speed steel construction for heat resistance and durability in ferrous materials
• 130-degree point angle with R-thinned web reduces thrust and improves centering
• 2-flute regular spiral design promotes efficient chip evacuation
• Screw machine (stub) length format increases rigidity and minimizes deflection
• Straight-cylindrical shank compatible with standard drill chucks and quick-change systems
• Coated finish extends tool life in abrasive cutting conditions

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for applications requiring a 0.242-inch (letter C) screw machine length bit in steel and alloy steel workpieces.

Installation Notes

This bit is installed by machinists and maintenance technicians using standard drill chucks or collet-style toolholders. Ensure the shank is fully seated and the chuck is properly tightened before operation. Use appropriate cutting fluid or coolant for steel applications to manage heat buildup, as this bit does not support through-coolant. Inspect the cutting edges for wear before each use to maintain hole quality and dimensional tolerance.