Osg 15161005 Cobalt Jobber Drill Bit Wire 20

Product Description

The OSG 15161005 is a cobalt jobber-length drill bit in wire size 20 (0.1610 inches, 4.09 mm) with a 130-degree split point and a titanium nitride (TiN) coating. It is built for high-performance drilling in steel and alloy steel, delivering heat resistance and edge retention that standard HSS bits cannot match. The TiN coating reduces friction and extends tool life in production drilling applications. Overall length is 3-9/16 inches with a 2-1/8-inch flute length and a 3/16-inch straight-cylindrical shank. This bit is sold individually and suited for machinists, maintenance technicians, and fabricators working in metal.

This drill bit is designed for use in blind hole drilling, cross hole drilling, through drilling, and self-centering applications on steel and alloy steel workpieces. The regular spiral flute with R-thinned web and tapered web configuration promotes efficient chip evacuation and reduces thrust in tighter setups. It fits applications where consistent hole size tolerance and a clean entry point matter, including production runs and maintenance repair operations in shop or field settings. Coolant-through is not supported on this bit.

Key Features

• Cobalt construction with TiN coating for heat resistance and extended tool life in steel and alloy steel
• 130-degree split point for self-centering entry and reduced walking on hard materials
• R-thinned, tapered web reduces drilling thrust and improves chip flow
• Right-hand cut, regular spiral flute for standard drilling machines and hand drills
• Straight-cylindrical shank fits standard 3-jaw chucks without a collet adapter
• Diameter tolerance of +0 to -0.018 mm for consistent, repeatable hole sizing

Compatibility

Designed as a replacement or production drill bit for use in standard drill presses, CNC machining centers, and hand drills accepting a 3/16-inch straight shank. Suited for applications within the 0.1500 to 0.2000 decimal inch drill size range on steel and alloy steel workpieces per OSG Series 1500.

Installation Notes

Secure the shank fully in a 3-jaw chuck or collet before operation and verify chuck runout is within acceptable limits to protect the cutting edge. Disconnect power to the drilling machine before changing bits. Use cutting fluid or coolant on the workpiece when practical to manage heat buildup, even though coolant-through is not available on this bit. Follow applicable shop safety standards and machine guarding requirements during operation.