Osg 8651200 Screw Machine Drill Bit 12mm Hss

Product Description

The OSG 8651200 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, this bit measures 12.00 mm (0.4724 inches) in diameter with an overall length of 108.00 mm (4.25 inches) and a flute length of 51.00 mm (2.01 inches). The 120-degree faceted drill point and web-thinned, tapered web configuration reduce entry force and improve chip evacuation. A right-hand spiral flute and straight-cylindrical shank round out the design for reliable performance in standard drill chucks and CNC toolholders.

This drill bit is suited for use in machine shops, production environments, and maintenance operations where short, rigid tooling is required. The screw machine length format provides added stability in drill presses, machining centers, and turret lathes. Primary workpiece materials include steel, alloy steel, aluminum, aluminum alloy, and aluminum silicate. The 3xD flute-to-diameter ratio and high performance grade make this bit appropriate for production drilling where consistency and tool life are priorities. It is typically applied by machinists and tool-and-die professionals working in both job shop and production settings.

Key Features

• 12.00 mm (0.4724 inches) drill diameter with a tolerance of +0 to -0.027 mm
• 120-degree faceted drill point for accurate self-centering entry
• Web-thinned tapered web reduces thrust and improves chip clearing
• High speed steel construction with coated finish for extended tool life
• Screw machine length (3xD) for rigid, stable drilling in short-reach setups
• Right-hand cut with regular spiral flute for compatibility with standard machine setups

Compatibility

Designed as an OEM-style replacement and standard-fit screw machine length drill bit for use in drill presses, CNC machining centers, and turret lathes accepting a 12.00 mm straight-cylindrical shank. Suitable for drilling steel, alloy steel, aluminum, aluminum alloy, and aluminum silicate workpieces.

Installation Notes

Installation and use should be performed by qualified machinists familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit. Secure the straight-cylindrical shank firmly in the chuck or collet to the tool manufacturer recommended engagement depth before starting the cut. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection based on workpiece material.