Osg 8655400 Jobber Drill Bit 4mm Hss WD1 130 Degree

Product Description

The OSG 8655400 is a jobber-length drill bit designed for high-performance drilling in metalworking and fabrication applications. Built from vanadium high speed steel with a WD1 coating, this bit delivers improved wear resistance and cutting performance across a range of ferrous and non-ferrous materials. The 130-degree S-thinned point promotes self-centering and reduces thrust force at entry, making it well-suited for production drilling where accuracy and consistency matter. With an overall length of 75 mm and a flute length of 43 mm, this is a standard jobber-length tool sized for general-purpose use on manual and CNC drilling equipment.

This drill bit is rated for use on steel, alloy steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The straight-cylindrical shank and 4 mm diameter make it compatible with standard drill chucks and collet holders used in both shop and field settings. Typical applications include blind hole drilling, cross hole drilling, and through-hole operations in light manufacturing, maintenance, and precision machining environments. The regular spiral flute geometry supports consistent chip evacuation without coolant-through capability.

Key Features

• Vanadium high speed steel construction with WD1 coating for extended tool life
• 130-degree drill point angle with S-thinned web for self-centering entry and reduced thrust
• Spiral flute with tapered web configuration promotes efficient chip removal
• Right-hand cut, straight-cylindrical shank fits standard chucks and collet systems
• Rated for blind hole, cross hole, and self-centering drilling applications
• Diameter tolerance of plus 0 to minus 0.018 mm for consistent, repeatable hole sizing

Compatibility

Designed for drilling steel, alloy steel, aluminum, aluminum alloy, and aluminum silicate. Compatible with standard drill chucks and collet holders accepting a 4 mm straight-cylindrical shank. Part of the OSG Series 1650 high-performance drill line.

Installation Notes

Installation and operation of this drill bit should be performed by machinists or qualified trade professionals familiar with rotary cutting tools. Ensure the drill chuck or collet is fully secured and the workpiece is firmly clamped before beginning a cut. Verify spindle speed and feed rate are appropriate for the workpiece material before operation. Inspect the cutting edges for wear or damage before each use and replace the bit when signs of dulling are present.