Osg 61627 Screw Machine Drill Bit 0.5 in Hss 120 Deg

Product Description

The OSG 61627 is a screw machine length drill bit designed for high-performance drilling in metalworking applications. Built from high speed steel (HSS) with a coated finish, this bit features a 0.5 inch (12.70 mm) diameter, a 120-degree faceted drill point, and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank measures 12.00 mm in diameter, and the overall length comes in at 108.00 mm (approximately 4.25 inches). Two spiral flutes with a regular spiral type handle chip removal efficiently during operation. Licensed machinists and metalworking professionals install this bit in screw machine and production drilling setups.

The OSG 61627 Series 1100 is suited for production and job-shop environments where shorter drill length improves rigidity and reduces deflection. Primary workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. The screw machine length profile makes it a standard choice for drill presses, CNC machining centers, and turret lathes where stub-length tooling is preferred for accuracy and stability. The 5xD flute-to-diameter ratio supports controlled chip flow across a range of feed rates.

Key Features

• 0.5 inch (12.70 mm) diameter with a diameter tolerance of +0 to -0.027 mm
• 120-degree faceted drill point with web thinning for reduced entry thrust
• High speed steel construction with coated finish for extended tool life
• 2 spiral flutes, regular spiral type, with 51.00 mm flute length
• Straight-cylindrical shank for secure chuck engagement
• Compatible with steel, stainless steel, aluminum, and aluminum alloy workpieces

Compatibility

Designed for use in screw machine length drilling applications on steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Part of the OSG Series 1100 high performance drill bit line.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling professionals. Secure the straight-cylindrical shank firmly in a compatible chuck before operation, and verify that chuck and spindle capacities match the 0.5 inch shank diameter. Always power down and lock out the machine before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection based on workpiece material.