Osg 61586 Screw Machine Drill Bit 0.3386 in Tin Hss

Product Description

The OSG 61586 is a screw machine length drill bit designed for high-performance metal removal in industrial and trade applications. Built from vanadium high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced heat buildup during drilling. The bit measures 0.3386 inches (8.60 mm) in diameter with a 3.5433-inch overall length and a 120-degree, 4-facet point that improves centering accuracy and reduces walking on entry. The web-thinned, parallel web configuration lowers thrust requirements. This bit is suited for machinists, tool and die professionals, and maintenance technicians working with tight-tolerance bore applications.

The OSG 61586 is rated for use on aluminum, carbon steel, high nickel alloy, stainless steel, and titanium workpieces. Its screw machine length — shorter than jobber length — improves rigidity and reduces deflection in drill press, CNC, and turret lathe setups. The straight cylindrical shank seats in standard drill chucks and collet holders with a 0.3937-inch shank diameter. It is well suited for production environments where tool consistency and hole quality are critical across multiple workpiece materials.

Key Features

• TiN coating reduces friction and extends cutting life compared to uncoated HSS
• Vanadium high speed steel substrate handles interrupted cuts and hard alloys
• 120-degree, 4-facet point geometry improves self-centering and reduces thrust
• Web-thinned parallel web lowers axial cutting forces
• Screw machine length body increases rigidity over jobber-length alternatives
• Right-hand, regular spiral flute promotes efficient chip evacuation

Compatibility

Rated for drilling aluminum, carbon steel, high nickel alloy, stainless steel, and titanium. Fits standard drill chucks and collet holders accepting a 0.3937-inch straight cylindrical shank. Part of the OSG Series 1100 high-performance drill line.

Installation Notes

Install in a drill press, CNC machining center, or turret lathe with an appropriately sized chuck or collet. Ensure the machine spindle is fully stopped and locked out before changing tooling. Apply cutting fluid or coolant appropriate to the workpiece material to manage heat, as this bit does not support through-coolant delivery. Confirm shank seating depth and runout before beginning production cuts.