Osg 61569 Screw Machine Drill Bit 0.2717 in Hss

Product Description

The OSG 61569 is a screw machine length drill bit designed for high-performance drilling in ferrous and non-ferrous materials. Built from high speed steel with a coated finish, this bit features a 120-degree faceted drill point, web-thinned geometry, and a spiral flute configuration that promotes efficient chip evacuation. At 0.2717 inches (Letter size I, 6.91 mm) in diameter, it fits the standard screw machine length profile, making it well suited for applications where stub-length rigidity and accuracy are required. It is installed and used by machinists, tool and die professionals, and maintenance technicians working on production or repair operations.

This bit is engineered for drilling in steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The screw machine length format offers a shorter, stiffer profile compared to jobber-length bits, reducing deflection in production drilling environments. The straight-cylindrical shank accommodates standard drill chucks and collet-style toolholders. The Series 1100 designation places it in OSG high-performance tooling, and the right-hand spiral flute design is compatible with conventional CNC and manual drill press setups.

Key Features

• High speed steel construction with coated finish for improved wear resistance
• 120-degree faceted drill point for accurate self-centering entry
• Web-thinned, tapered web configuration reduces thrust force at entry
• 2-flute regular spiral design promotes consistent chip clearance
• Screw machine length profile provides added rigidity over jobber-length bits
• Right-hand cut for use with standard clockwise-rotating spindles

Compatibility

Designed for use in steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Fits standard drill chucks and collet holders accepting an 8 mm (straight-cylindrical) shank. Suited for drill press, CNC machining center, and hand-drill applications within the 0.2500 to 0.3000 decimal inch diameter range.

Installation Notes

This bit is installed by machinists and maintenance technicians using standard drill press or CNC spindle equipment. Secure the straight-cylindrical shank firmly in a properly sized chuck or collet before operation. Ensure the drilling machine is fully de-energized and the spindle is at rest before changing tooling. Verify spindle speed and feed rate are appropriate for the workpiece material before beginning a cut.