Osg 61556 Screw Machine Drill Bit 0.2205 in Hss

Product Description

The OSG 61556 is a screw machine length drill bit designed for high-performance metal drilling in professional machining and fabrication environments. Built from high speed steel with a coated finish, it measures 0.2205 inches (5.60 mm) in diameter with an overall length of 72.00 mm (approximately 2.83 inches). The 120-degree faceted drill point and web-thinned, tapered web configuration reduce entry force and improve centering accuracy. Two spiral flutes with a regular helix evacuate chips efficiently. This bit is suited for machinists, tool-and-die trades, and precision fabrication shops running short-length drilling operations on a range of metal workpieces.

The OSG 61556 is rated for use on steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The screw machine length body — shorter than a jobber bit — provides added rigidity and reduced deflection, making it well suited for drill press, CNC, and turret lathe applications where hole location accuracy and tool life are priorities. The straight-cylindrical shank seats directly into standard drill chucks and collet holders without adapters.

Key Features

• 0.2205 inch (5.60 mm) diameter with a tight tolerance of +0 to -0.018 mm
• 120-degree faceted point for accurate self-starting on flat and curved surfaces
• Web-thinned tapered web reduces thrust load at drill entry
• High speed steel construction with coated finish for extended tool life
• Screw machine length body (flute length 28.00 mm) provides rigidity and reduces deflection
• Right-hand cut, two-flute spiral configuration for efficient chip evacuation
• Series 1100 high performance grade rated for steel, stainless steel, and aluminum families

Compatibility

Designed for use on steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The 6.00 mm straight-cylindrical shank fits standard drill chucks and collet systems accepting that shank diameter.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or fabrication trades familiar with proper cutting speeds and feeds for the workpiece material. Secure the shank fully in the chuck or collet and confirm runout before operation. Always wear appropriate eye protection and ensure the workpiece is firmly fixtured before drilling. Do not exceed the rated capacity of the machine spindle for the selected material.