Osg 61615 Screw Machine Drill Bit 0.4528 in Hss

Product Description

The OSG 61615 is a screw machine length drill bit designed for high-performance drilling in metalworking applications. It measures 0.4528 inches (11.50 mm) in diameter with a 120-degree faceted point angle and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation at the cutting tip. The bit is manufactured from high speed steel with a coated finish and features a right-hand spiral flute geometry. Its shorter-than-jobber body profile makes it well suited for rigid, close-tolerance drilling where minimizing runout and deflection is a priority. Licensed machinists, toolroom technicians, and production drilling operators are the primary users.

This bit is sized within the 0.4500 to 0.5000 inch decimal inch range and belongs to OSG Series 1100. It is intended for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The straight-cylindrical shank accepts standard drill chucks and collet holders. Its compact screw machine length with a 5xD flute-to-diameter ratio suits CNC machining centers, turret lathes, drill presses, and manual screw machines where stub-length tooling is preferred for stability.

Key Features

• 0.4528 inch (11.50 mm) diameter with tolerance of +0 to -0.027 mm for consistent hole sizing
• 120-degree faceted drill point reduces walking and improves entry accuracy on flat and curved surfaces
• Web-thinned tapered web lowers cutting thrust and extends tool life in tough alloys
• High speed steel construction with coated finish for wear resistance across steel and aluminum materials
• Regular spiral, 2-flute design promotes efficient chip clearance in through-hole and blind-hole drilling
• Screw machine length body provides added rigidity compared to jobber length equivalents

Compatibility

Designed for use with workpiece materials including steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Fits any drill chuck or collet holder accepting a 12.00 mm (approximately 0.4724 inch) straight-cylindrical shank.

Installation Notes

This bit is installed and operated by machinists and toolroom professionals. Before changing tooling, power down and lock out the machine spindle per OSHA lockout/tagout procedures. Secure the shank fully in the chuck or collet to the manufacturer-recommended engagement depth before operation. Inspect the cutting edges and coating condition before each use and replace the bit if chipping or excessive wear is observed.