Century Drill Tool 74130 Lh Cobalt Stub Drill Bit 15/32 in 3pk

Product Description

The CENTURY DRILL TOOL CO INC 74130 is a 15/32-inch left hand cobalt stub drill bit designed for professionals who need to extract broken fasteners, remove damaged bolts, or drill in reverse rotation applications. Built from cobalt steel with an industrial polished finish, this stubby mechanics-length bit offers greater rigidity than standard-length bits, reducing deflection and improving accuracy in tight spaces. The 135-degree split point geometry enables self-centering starts without a center punch, and the reduced flute length of 2.75 inches over an overall length of 4.75 inches adds column strength under aggressive feed rates. This package includes 3 bits per unit.

Left hand drill bits are a standard tool in automotive, manufacturing, and mechanical repair environments where broken studs, snapped bolts, and stripped fasteners require reverse-rotation drilling. The stub length format is preferred in low-clearance situations such as engine bays, machine frames, and structural assemblies where a full-length bit would contact surrounding components or flex under load. Licensed mechanics, machinists, and maintenance technicians are the primary installers of this type of tooling.

Key Features

• Left hand (reverse) rotation for broken fastener extraction and reverse-drilling applications
• Cobalt steel construction for heat and wear resistance in hard or abrasive materials
• 135-degree split point for self-centering starts without a center punch
• Stubby mechanics length — 4.75 inches overall — adds rigidity and reduces deflection
• Flute length of 2.75 inches provides adequate chip clearance while maintaining bit strength
• Industrial polished finish for smooth chip evacuation
• Sold in a 3-piece package for job-site availability

Compatibility

Designed for use in standard left hand or reversible drill chucks accepting 15/32-inch round shank bits. Suitable for drilling mild steel, stainless steel, cast iron, and other hard metals commonly encountered in mechanical and industrial repair work.

Installation Notes

Left hand drill bits must be used in a drill driver set to reverse rotation. Ensure the drill chuck is rated for the shank diameter before installation. When used for fastener extraction, secure the workpiece firmly to prevent rotation and wear appropriate eye protection and hand protection. Follow applicable shop safety practices and OSHA guidelines for rotating tool use.