Precision Twist Drill 5996015 Cobalt Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996015 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and abrasive workpiece materials. Built to Series M40CO standards, this bit features a 135-degree split point for fast penetration and reduced walking, a web-thinned tapered web for lower thrust requirements, and a right-hand spiral flute for efficient chip evacuation. At 0.2812 inches (9/32 inch) in diameter, it is sized for precision hole work in metals including stainless steel, tool steel, and other hard alloys. Licensed machinists, tool and die workers, and maintenance mechanics commonly use this bit in production and maintenance drilling applications.

This drill bit is suited for use in screw machine operations, CNC drilling, and bench drill press work where a shorter flute length and stubby overall length improve rigidity and reduce deflection. The straight-cylindrical shank seats securely in standard drill chucks and quick-change holders. Its cobalt construction and M40CO material grade make it a reliable choice when high-speed steel bits wear prematurely on hard or work-hardening materials. The 2.5xD flute-to-diameter ratio supports chip clearance in shorter hole depths typical of screw machine work.

Key Features

• Cobalt M40CO construction for drilling hard and abrasive materials
• 135-degree split point reduces bit walking and lowers entry thrust
• Web-thinned tapered web decreases drilling resistance
• Screw machine length provides added rigidity and reduced deflection
• Right-hand spiral flute promotes consistent chip evacuation
• Straight-cylindrical shank fits standard chucks and quick-change tooling
• Meets ANSI specification standards

Compatibility

Designed as an OEM-style replacement and production-use drill bit for applications requiring a 9/32 inch diameter screw machine length bit in the 0.2500 to 0.3000 inch drill bit size range, compatible with standard drill chucks and screw machine tooling setups.

Installation Notes

Install and remove drill bits only after the machine spindle has come to a complete stop and the machine is powered down or locked out per applicable OSHA lockout/tagout procedures. Ensure the straight-cylindrical shank is fully seated and the chuck is tightened securely before operation. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting this bit does not support coolant-through delivery. Inspect the cutting edges and split point for wear or chipping before each use.