Century Drill Tool 74132 Left Hand Cobalt Stub Drill Bit 1/2 in

Product Description

The CENTURY DRILL TOOL CO INC 74132 is a left-hand cobalt stub drill bit designed for demanding extraction and reverse-drilling applications. Built from premium cobalt steel, this bit delivers the heat resistance and edge retention needed when working through hardened fasteners, broken bolts, or difficult alloys. The 135-degree split point reduces walking and cutting pressure at startup. With an overall length of 5 inches and a flute length of 2.875 inches, the stubby mechanics length profile provides added rigidity and strength compared to standard jobber-length bits. This bit carries an industrial polished finish and is sold in a package of 3.

This bit is suited for automotive, heavy equipment, and industrial maintenance work where broken or seized fasteners need to be drilled out. The left-hand rotation pairs with standard extraction tools, often backing the fastener out during the drilling process before a full extraction is needed. Typical installers include automotive technicians, machinists, and maintenance mechanics working in shop or field environments. The stub length is especially practical in confined spaces where a full-length bit would be difficult to control.

Key Features

• Left-hand rotation for reverse-drilling and fastener extraction
• Premium cobalt steel construction for heat resistance and long edge life
• 135-degree split point reduces bit walking and lowers cutting pressure
• Stubby mechanics length adds rigidity and reduces flex during drilling
• Industrial polished finish for smooth chip evacuation
• Sold as a 3-piece package

Compatibility

Designed as an OEM-style replacement and general-use left-hand stub drill bit suitable for standard 1/2-inch drill chucks and compatible chuck configurations on corded or pneumatic reverse-capable drills.

Installation Notes

Installation and use should be performed by qualified technicians familiar with reverse-drill extraction procedures. Ensure the drill is set to reverse rotation before engaging the bit. Secure the workpiece firmly to prevent movement during drilling. Eye protection and appropriate PPE are required when drilling into hardened or unknown materials.