Century Drill Tool 74104 5/64 Inch Lh Cobalt Stub Drill Bit

Product Description

The CENTURY DRILL TOOL CO INC 74104 is a left-hand cobalt stub drill bit designed for extracting broken fasteners and drilling in reverse-rotation applications. Built from premium cobalt steel, this stubby mechanics-length bit measures 5/64 inch in diameter with a 1-inch flute length and a 2-inch overall length. The 135-degree split point reduces walking on entry and requires less feed pressure than a standard 118-degree point. The industrial polished finish resists heat buildup during high-torque drilling operations. This bit ships in a package quantity of 4, making it practical for shop stocking or field kits.

Left-hand stub drill bits are a standard tool in automotive, mechanical, and industrial maintenance settings where broken bolts, studs, or screw heads must be removed. The shortened stub length adds rigidity, reducing deflection in tight clearance areas such as engine blocks, flanges, and machinery frames. The cobalt steel construction handles harder materials including stainless steel, cast iron, and hardened alloys where standard high-speed steel bits tend to dull prematurely. Licensed mechanics, machinists, and industrial maintenance technicians are the primary installers of this product type.

Key Features

• Left-hand flute geometry aids broken fastener extraction when used with a reversing drill
• 135-degree split point for self-centering entry and reduced feed force
• Premium cobalt steel construction for drilling hardened and abrasion-resistant materials
• Stub mechanics length increases rigidity and reduces deflection in confined spaces
• Industrial polished finish for reduced friction and improved heat dissipation
• Packaged as 4 units per package for convenient shop or field stocking

Compatibility

Designed as an OEM-style replacement and general-use left-hand cobalt stub drill bit compatible with standard 3-jaw drill chucks accepting 5/64-inch shank sizes.

Installation Notes

Left-hand drill bits are installed in a reversing drill or drill press set to counterclockwise rotation. Secure the workpiece firmly before drilling to prevent movement under torque. Eye protection and appropriate work gloves are recommended when drilling hardened materials. Consult applicable workplace safety codes before use in industrial environments.