Precision Twist Drill 5996169 Cobalt Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996169 is a cobalt screw machine length drill bit engineered for drilling into hard and abrasive materials where standard high-speed steel bits fall short. Built to ANSI standards as part of the M41CO series, it features a 135-degree split point with web thinning for reduced thrust and faster penetration on entry. The straight-cylindrical shank seats securely in standard drill chucks and quick-change holders. At 0.040 inches in diameter (Wire Size 60), this bit is designed for precision small-diameter work in metalworking, maintenance, and fabrication environments. Licensed machinists, tool and die workers, and maintenance technicians are the primary users.

This bit is suited for drilling hard metals including stainless steel, high-nickel alloys, titanium, and hardened steels where high-performance tooling is required. The screw machine length format — shorter than a jobber-length bit — provides increased rigidity and reduced deflection, making it a strong choice for drill press, CNC, and manual machine applications where hole location accuracy matters. The 2.5xD flute-to-diameter ratio and tapered web configuration support chip evacuation in short, interrupted cuts.

Key Features

• Cobalt (M41 grade) construction for heat resistance and durability in hard material applications
• 135-degree split point with web thinning reduces walking and lowers required thrust force
• Screw machine length body increases rigidity and minimizes deflection versus jobber-length bits
• Right-hand spiral flute with regular spiral promotes efficient chip removal
• Straight-cylindrical shank compatible with standard chucks and quick-change systems
• Built to ANSI specification for dimensional consistency across replacement purchases

Compatibility

Designed as a high-performance OEM-style replacement for screw machine length cobalt drill bits in Wire Size 60 (0.040 inches) applications across metalworking, maintenance, and fabrication setups requiring M41-grade cobalt tooling.

Installation Notes

Installation is performed by machinists and maintenance technicians using standard drill chucks or quick-change tool holders rated for the shank diameter. Ensure the shank is fully seated and the chuck is tightened securely before operation. Use appropriate cutting fluid for the workpiece material to extend tool life and manage heat buildup. Inspect the cutting edge before use and replace the bit if chipping or dullness is observed.