Precision Twist Drill 5996142 Cobalt Drill Bit No. 53

Product Description

The PRECISION TWIST DRILL 5996142 is a screw machine length cobalt drill bit designed for heavy-duty drilling in hard and tough materials. Built to Series M41CO standards, this bit uses a high-cobalt M41 tool steel construction that maintains hardness and edge retention at elevated cutting temperatures. The 135-degree split point with web thinning reduces thrust and enables self-centering entry without a pilot hole. At 1-5/8 inches overall length, the shortened flute-to-shank ratio is optimized for rigid setups in drill presses, CNC machines, and screw machine applications where stub-length stability matters.

This bit is sized to wire gauge No. 53, measuring 0.0595 inches in decimal equivalent. It is intended for drilling hard ferrous metals, stainless steel, titanium, and other high-strength alloys where standard high-speed steel bits lose cutting efficiency. Typical installation environments include machine shops, production lines, and field service work requiring precise small-diameter holes in hard material. Right-hand cut spiral flutes evacuate chips efficiently during through-hole and blind-hole drilling operations.

Key Features

• M41 cobalt tool steel construction for high-heat, hard-material cutting performance
• 135-degree split point with web thinning for self-centering entry and reduced feed pressure
• Screw machine (stub) length body for maximum rigidity and reduced deflection in small-diameter drilling
• Regular spiral flutes with 2.5xD flute-to-diameter ratio for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Tapered web configuration adds core strength along the flute length
• Meets ANSI standards for dimensional accuracy and geometry

Compatibility

Designed as a screw machine length replacement drill bit for production and machining applications requiring a No. 53 wire gauge, 0.0595-inch diameter cobalt bit with a straight-cylindrical shank.

Installation Notes

Installation and use of this drill bit should be performed by machinists or qualified trade professionals familiar with drill press, lathe, or CNC machine operation. Secure the straight-cylindrical shank firmly in a properly sized chuck or collet before operation and verify concentricity to minimize runout. Always wear appropriate eye protection and follow applicable shop safety protocols when operating rotary cutting tools. Do not exceed the recommended speed and feed ranges for the workpiece material being drilled.