Precision Twist Drill 5996518 Cobalt Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5996518 is a cobalt screw machine length drill bit designed for high-performance drilling in hard and abrasive materials. Built to ANSI standards, it features a 135-degree split point for fast penetration and reduced walking on entry. The straight-cylindrical shank seats securely in standard drill chucks and CNC screw machine spindles. At 0.332 inches in diameter with an overall length of 3 inches and a flute length of 1-11/16 inches, this M42 cobalt bit handles demanding production and maintenance drilling where standard high-speed steel bits fall short. The web-thinned, tapered web configuration reduces thrust and improves chip evacuation in tight cutting conditions.

This bit is suited for use in screw machines, drill presses, and CNC machining centers where short, rigid tooling is required. The screw machine length format provides extra rigidity compared to jobber-length bits, making it a practical choice for production drilling in steel, stainless, cast iron, titanium, and other hard workpiece materials. It is used by machinists, toolroom technicians, and maintenance professionals working in industrial and manufacturing environments.

Key Features

• M42 cobalt construction for heat resistance and extended tool life in hard materials
• 135-degree split point reduces thrust and eliminates center-punch requirements on most metals
• Web-thinned tapered web improves chip flow and reduces cutting resistance
• Screw machine length body provides increased rigidity over jobber-length alternatives
• Right-hand cut with regular spiral flutes compatible with standard clockwise-rotation spindles
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as an OEM-style replacement or direct tooling option for screw machines, drill presses, and CNC machining centers requiring a straight-shank drill bit in the 0.3000 to 0.3500 inch diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or tool-and-die technicians familiar with rotating cutting tools. Ensure the spindle is fully stopped and power is locked out before changing or seating the bit in the chuck. Inspect the shank and chuck jaws for wear or debris before tightening. Do not exceed the rated speed range for the workpiece material and bit diameter as specified in standard machining data references.