Century Drill Tool Co Inc 74112 Lh Cobalt Stub Drill Bit

Product Description

The CENTURY DRILL TOOL CO INC 74112 is a 3/16-inch left hand cobalt stub drill bit designed for industrial drilling applications where reverse-direction cutting is required. Built from cobalt steel, this bit handles hardened materials and high-heat drilling conditions better than standard high-speed steel. The 135-degree split point reduces walking at startup and requires less feed pressure during penetration. At 2-7/8 inches overall length, the stubby mechanics format provides added rigidity and strength in tight or confined work areas. Licensed tradespeople in HVAC, plumbing, electrical, and mechanical service use this style of bit primarily for removing broken fasteners and extracting stripped screws.

This bit is suited for use in residential and commercial service settings where reverse-drill extraction is part of the workflow. The short flute length of 1-1/2 inches and compact overall length make it especially practical in confined spaces such as equipment panels, junction boxes, and mechanical assemblies. The left hand rotation engages broken bolts or screws and can back them out as the bit cuts, reducing the need for separate extractor tools. It is sold in a package of 4 bits, making it practical for field use where spares are needed on the job.

Key Features

• Left hand cutting direction aids in backing out broken or stripped fasteners during drilling
• Cobalt steel construction resists heat and wear when drilling hardened materials
• 135-degree split point reduces bit walking and lowers required feed pressure
• Stubby mechanics length adds rigidity and strength over standard-length bits
• Industrial polished finish on flutes for smoother chip evacuation
• Package of 4 bits included per unit

Compatibility

Designed as an OEM-style replacement or direct-use left hand drill bit for standard 3/8-inch or 1/2-inch chuck reversible drills used in industrial and trade service applications.

Installation Notes

Left hand drill bits require a reversible drill driver set to reverse rotation before use. Secure the workpiece firmly before drilling to prevent movement. Use appropriate cutting fluid when drilling hardened steel to extend bit life and reduce heat buildup. Eye protection and work gloves are recommended when drilling metal in service environments.