Precision Twist Drill 5996068 Cobalt Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996068 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and abrasive materials. Sized at 15/64 inch (0.2344 inches) in diameter, it features a 135-degree split point that reduces walking and lowers the thrust required to start a hole. The M40CO series cobalt construction handles elevated heat without losing hardness, making it well-suited for stainless steel, high-nickel alloys, and other tough workpiece materials. The overall length is 2-7/16 inches with a 1-5/16 inch flute length. Straight-cylindrical shank fits standard drill chucks. Meets ANSI standards.

Screw machine length drill bits are shorter than jobber-length bits, providing greater rigidity and reduced deflection in production drilling and tight-clearance applications. This bit is intended for use in drill presses, CNC machining centers, lathes, and hand drills where stub-length tools are preferred. The 2.5xD flute-to-diameter ratio and tapered web configuration support chip evacuation in short, interrupted cuts. Designed for hard material applications including hardened steels and heat-resistant alloys. Ideal for machinists, toolroom technicians, and maintenance professionals working with difficult-to-machine metals.

Key Features

• 15/64 inch (0.2344 inches) diameter cobalt construction for heat and wear resistance in hard materials
• 135-degree split point reduces thrust and minimizes drill walking on entry
• Web-thinned, tapered web design improves chip flow and cutting efficiency
• Screw machine (stub) length at 2-7/16 inches overall provides rigidity and reduced deflection
• Right-hand cut spiral flute with 2.5xD ratio for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and collets
• Meets ANSI specification requirements; M40CO grade cobalt steel

Compatibility

Designed as an OEM-style replacement and standard production drill bit for use in any setup requiring a stub-length cobalt drill in the 0.2000 to 0.2500 inch diameter range with a straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating tool safety practices. Secure the shank fully in the chuck or collet before operation and confirm the workpiece is clamped or fixtured to prevent movement. Power down and de-energize the machine before changing tooling. Do not exceed the spindle speed and feed rate recommended for cobalt tooling in the specific workpiece material being drilled.