Precision Twist Drill 5995962 Cobalt Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5995962 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and difficult-to-machine materials. Built to ANSI standards, this bit features a 135-degree split point for fast starts without center punching and a web-thinned, tapered web configuration that reduces thrust during entry. The straight-cylindrical shank seats securely in standard drill chucks. At 3/8 inch diameter with a 3-1/8 inch overall length and a 1-13/16 inch flute length, the short stub body provides rigidity and reduces deflection in production and maintenance drilling applications. Right-hand spiral flutes evacuate chips efficiently during operation.

This bit is suited for metalworking trades including machinists, maintenance technicians, pipefitters, and millwrights working in production environments or field maintenance. The M40CO series cobalt construction handles stainless steel, high-nickel alloys, cast iron, and other hard workpiece materials that would quickly dull standard high-speed steel bits. The 2.5xD flute-to-diameter ratio and heavy-duty grade make it appropriate for use in drill presses, CNC machines, and handheld right-angle drills where a shorter cutting length improves control and reduces chatter.

Key Features

• Cobalt construction (M40CO series) for drilling hard and abrasion-resistant materials
• 135-degree split point reduces walking and lowers required feed force
• Web-thinned, tapered web configuration reduces axial thrust at entry
• Screw machine (stub) length provides added rigidity over jobber-length bits
• Right-hand spiral flutes promote chip evacuation in blind and through holes
• Straight-cylindrical shank fits standard 3-jaw and keyless drill chucks

Compatibility

Designed as an OEM-style replacement or direct fitment for 3/8 inch straight-shank drill applications requiring cobalt-grade tooling rated for hard workpiece materials per ANSI specifications.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with metal-cutting operations. Secure the shank fully in the chuck and verify concentricity before applying feed pressure. Use appropriate cutting fluid for the workpiece material to extend tool life and improve hole finish. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.