Osg 8597404 Jobber Drill Bit 21 Wire Tin Hss

Product Description

The OSG 8597404 is a jobber-length drill bit designed for high-performance drilling in ferrous and non-ferrous metals. Built from vanadium high speed steel and finished with a titanium nitride (TiN) coating, this bit delivers extended tool life and reduced friction in demanding production environments. It carries a wire gauge size of 21, which corresponds to 0.1591 inches (4.04 mm) in decimal form. The 120-degree split point with S-thinned web promotes self-centering entry and reduces thrust force, making it well suited for work on steel, stainless steel, aluminum, and aluminum alloys. A licensed machinist or tool-and-die technician would typically deploy this bit in CNC or manual drilling operations requiring tight-tolerance hole placement.

This bit fits production machining, fabrication, and maintenance applications where wire-gauge sizing is specified. It is appropriate for blind holes, cross holes, through-hole drilling, and self-centering operations. The Series 1600 designation places it in OSG's high-performance jobber-length line. The straight-cylindrical shank with a 6.00 mm shank diameter seats in standard drill chucks and collet holders used in both benchtop and CNC setups. Workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate, covering a broad range of shop and field machining tasks.

Key Features

• Wire size 21 (0.1591 inch / 4.04 mm) with diameter tolerance of plus 0 to minus 0.018 mm for consistent hole sizing
• Vanadium high speed steel construction rated for high-performance cutting in ferrous and non-ferrous materials
• Titanium nitride (TiN) coating reduces friction and extends tool life compared to uncoated HSS
• 120-degree drill point with S-thinned web for self-centering entry and reduced thrust
• Regular spiral flute geometry with 2 flutes and 43.00 mm flute length promotes chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and collet systems

Compatibility

Designed as a jobber-length drill bit for use in standard drill chucks and collet holders accepting a 6.00 mm straight-cylindrical shank. Suitable for CNC machining centers, drill presses, and hand-held power drills where wire-gauge or decimal-inch sizing in the 0.1500 to 0.2000 inch range is required.

Installation Notes

Installation is performed by machinists or maintenance technicians familiar with rotating cutting tools. Ensure the machine spindle is fully stopped and powered down before inserting or removing the bit from the chuck or collet. Verify chuck or collet bore matches the 6.00 mm shank diameter to prevent runout. Coolant-through is not supported on this bit, so apply cutting fluid externally when drilling stainless steel or other work-hardening materials to manage heat buildup.