Osg 10159005 Screw Machine Drill Bit 0.159 in Cobalt

Product Description

The OSG 10159005 is a screw machine length drill bit designed for high-performance drilling in steel and alloy steel. Built from cobalt high speed steel with a coated finish, this bit handles demanding applications where standard HSS tooling falls short. It features a 130-degree drill point angle with R-thinned web geometry, which reduces thrust and improves chip flow at entry. The straight-cylindrical shank seats securely in standard drill chucks and machine spindles. At 0.159 inches (wire gauge #21) in diameter, this bit suits precision hole work in metalworking and fabrication environments. Machinists, tool-and-die technicians, and maintenance professionals specify this bit for ferrous metal drilling.

This drill bit fits screw machine, drill press, and CNC drilling applications where a short, rigid tool length is required for close-tolerance work. The screw machine length format minimizes deflection compared to jobber-length bits, making it well-suited for production drilling in steel, alloy steel, and similar ferrous workpiece materials. The 2-flute spiral design provides efficient chip evacuation in through-hole and blind-hole configurations. It is appropriate for both manual machine operation and automated setups requiring consistent hole quality across high-volume runs.

Key Features

• Cobalt high speed steel construction for improved heat and wear resistance in ferrous metals
• 130-degree drill point angle with R-thinned web reduces entry thrust and improves centering
• Screw machine length format provides rigidity and minimizes deflection during drilling
• Straight-cylindrical shank is compatible with standard drill chucks and collet systems
• 2-flute regular spiral design promotes efficient chip evacuation in steel and alloy steel
• Diameter tolerance of +0 to -0.018 mm supports consistent, repeatable hole sizing

Compatibility

Designed as an OEM-style replacement and standard drill bit for use in screw machine, drill press, and CNC drilling setups targeting steel and alloy steel workpieces in the 0.1500 to 0.2000 inch diameter range.

Installation Notes

This bit is installed and serviced by machinists and maintenance technicians. Power down and de-energize the machine before changing tooling. Secure the shank fully in the chuck or collet to the recommended grip depth before operation. Do not exceed the feed and speed parameters appropriate for cobalt HSS tooling in the target material.