Osg 6155511 Screw Machine Drill Bit 5.5 Mm Hss

Product Description

The OSG 6155511 is a screw machine length drill bit engineered for high-performance drilling in metalworking and industrial applications. Built from high speed steel with a coated finish, this bit measures 5.5 mm (0.2165 inches) in diameter with an overall length of 72 mm (2.835 inches) and a flute length of 28 mm. The 120-degree four-facet point geometry promotes accurate entry and reduces walking on hard materials. Web thinning lowers thrust requirements and improves chip evacuation. Licensed machinists, tool-and-die techs, and maintenance professionals will find this bit suited to production drilling environments where precision and tool life matter.

The OSG 6155511 is designed for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Its screw machine length profile — shorter overall length than a jobber bit — provides added rigidity in drill press, CNC, and turret lathe setups where stub-length reach is preferred. The straight-cylindrical shank measures 6 mm (0.2362 inches) in diameter, seating cleanly in standard collets and chucks. Series 1100 construction follows a regular spiral, two-flute, tapered web configuration optimized for a 5xD flute-to-diameter ratio.

Key Features

• High speed steel construction with coated finish for improved wear resistance
• 120-degree four-facet point for accurate self-centering entry
• Web-thinned, tapered web design reduces cutting thrust and aids chip flow
• Screw machine (stub) length adds rigidity over standard jobber bits
• Right-hand cut, regular spiral, two-flute geometry suits a wide range of metal workpieces
• Diameter tolerance held to +0 to -0.018 mm for consistent hole sizing

Compatibility

Compatible with steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Suited for use in drill presses, CNC machining centers, and turret lathes accepting a 6 mm straight-cylindrical shank. Fits the OSG Series 1100 product family in the 5.00 mm to 6.50 mm diameter range.

Installation Notes

This drill bit is installed and used by machinists and maintenance technicians operating drilling equipment. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Always use appropriate cutting fluid or coolant for the workpiece material, and ensure the workpiece is firmly fixtured to prevent movement during drilling. Inspect the cutting edges for wear before each use and replace the bit when point geometry degrades to avoid oversized or off-location holes.