Osg 10185005 Screw Machine Drill Bit 0.185 in Cobalt Hss

Product Description

The OSG 10185005 is a screw machine length drill bit designed for high-performance drilling in steel and alloy steel applications. Built from cobalt high speed steel with a coated finish, it delivers improved heat and wear resistance compared to standard HSS tooling. The bit features a 130-degree split point with R-thinned web for reduced thrust and faster penetration. At 0.185 inches (wire size No. 13) in diameter, it is suited for precision hole-making where dimensional accuracy and tool life are priorities. Machinists, tool-and-die tradespeople, and maintenance mechanics rely on this bit for short-length rigidity in close-tolerance drilling setups.

This drill bit is built for use in screw machine, CNC, and manual drill press operations where a stubby, rigid tool profile reduces deflection. Its primary workpiece materials are steel and alloy steel, making it a staple in fabrication shops, manufacturing facilities, and industrial maintenance environments. The 3xD flute-to-diameter ratio and screw machine length keep the bit stable under moderate to high feed rates. It ships individually and requires no minimum order beyond a single unit.

Key Features

• Cobalt high speed steel construction with coated finish for extended tool life in steel and alloy steel
• 130-degree drill point angle with R-thinned, tapered web for reduced entry thrust
• Screw machine (stub) length provides added rigidity and reduced deflection
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters
• Diameter tolerance of plus 0 to minus 0.018 mm for consistent hole sizing

Compatibility

Designed as an OEM-style replacement or standard tooling selection for screw machine and drill press setups that accept straight-cylindrical shank drill bits in the 0.150 to 0.200 inch diameter range.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance professionals familiar with rotary cutting tools. Secure the straight-cylindrical shank firmly in a keyed or keyless chuck before operation, and verify chuck runout is within acceptable limits to maintain hole accuracy. Always power down and de-energize the machine before changing tooling. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting this bit does not support through-coolant delivery.