Osg 15578105 Cobalt Jobber Drill Bit 37/64 Inch Tin

Product Description

The OSG 15578105 is a cobalt jobber-length drill bit with a titanium nitride (TiN) coating, designed for high-performance drilling in steel and alloy steel. It carries a 130-degree point angle with R-thinned web geometry for improved self-centering and reduced thrust in tough materials. The overall length is 7.1875 inches with a flute length of 4.8125 inches. The straight-cylindrical shank measures 5/8 inch in diameter. This bit belongs to OSG Series 1500 and is intended for use by machinists, tool-and-die tradespeople, and maintenance professionals working with ferrous metals.

This bit is suited for blind hole, cross hole, and standard through-hole drilling operations in steel and alloy steel workpieces. The regular spiral flute and right-hand cut make it a direct fit for conventional drill presses, CNC machining centers, and handheld power tools with compatible chucks. The 37/64-inch diameter (0.5781 decimal inch, 14.68 mm) targets applications requiring precision fractional sizing within the 0.5000 to 0.6500 decimal inch range.

Key Features

• Cobalt construction for heat resistance and extended tool life in ferrous materials
• TiN coating reduces friction and increases surface hardness for longer cutting edge life
• 130-degree point angle with R-thinned web improves self-centering and reduces walking on entry
• Right-hand spiral flute promotes efficient chip evacuation in steel and alloy steel
• Straight-cylindrical 5/8-inch shank for secure seating in standard drill chucks and collets
• Tapered web configuration adds rigidity along the full flute length

Compatibility

Designed as a high-performance jobber-length drill bit for use in steel and alloy steel applications. Compatible with standard drill chucks and collets accepting a 5/8-inch straight shank. Primary workpiece material code P per ISO classification.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tradespeople familiar with metal cutting operations. Secure the shank fully in the chuck or collet before operation and verify runout within acceptable limits for the application. Always power down and lock out the machine before changing tooling. Coolant through is not supported on this bit; apply cutting fluid externally when drilling deep holes in hard alloys to manage heat buildup.