Osg 61515 Screw Machine Drill Bit 0.0591in Hss

Product Description

The OSG 61515 is a screw machine length drill bit designed for high-performance drilling in metalworking and machining applications. Built from high speed steel with a coated finish, it features a 140-degree faceted point angle and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank measures 3.00mm in diameter, and the overall tool length is 41.00mm (approximately 1.61 inches). With two spiral flutes and a 5xD flute-to-diameter ratio, this bit delivers consistent cutting performance in production environments. It is installed and used by machinists and tool-and-die professionals working on precision drilling operations.

The OSG 61515 is suited for drilling into steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Its screw machine length profile makes it a practical choice for CNC machining centers, drill presses, and manual machine tools where stub-length rigidity is preferred over jobber-length reach. The compact flute length of 9.00mm and reduced overall length improve stability at higher feed rates. This bit fits into standard drill chucks and collet holders accepting a 3.00mm straight-cylindrical shank.

Key Features

• 0.0591 inch (1.50mm) diameter with a tolerance of +0 to -0.014mm for precision hole sizing
• 140-degree faceted point angle with web thinning for reduced entry thrust
• High speed steel construction with a protective coating for extended tool life
• Right-hand spiral flute design for efficient chip clearing in through-hole and blind-hole applications
• Screw machine (stub) length provides added rigidity compared to jobber-length bits
• Compatible with steel, stainless steel, aluminum, and aluminum alloy workpiece materials

Compatibility

The OSG 61515 is a Series 1100 screw machine length drill bit suited for use with standard drill chucks and collet systems accepting a straight-cylindrical shank. Primary workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate as noted by the manufacturer.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists following established shop safety procedures. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable tolerance for the application. Power down the machine completely before inserting or removing the bit. Always operate within the spindle speed and feed rate parameters appropriate for the workpiece material and bit diameter.