Century Drill Tool Co Inc 74108 Lh Cobalt Stub Drill Bit 1/8 in

Product Description

The CENTURY DRILL TOOL CO INC 74108 is a left-hand cobalt stub drill bit designed for professional drilling applications where standard right-hand bits fall short. Built from cobalt steel, this stubby mechanics-length bit delivers added rigidity and resistance to heat and wear compared to standard high-speed steel. The 135-degree split point reduces walking on entry and requires less feed pressure, making it a reliable choice for drilling in hardened or difficult materials. The industrial polished finish supports smooth chip evacuation. With a 1/8-inch diameter and compact overall length, this bit is well-suited for tight-access drilling in metal fabrication, automotive, and mechanical service work.

Left-hand drill bits are commonly used by licensed mechanics, machinists, and maintenance technicians who need to extract broken bolts, studs, or fasteners. When used with a reversing drill, the left-hand flute direction often backs out a broken fastener during the drilling process, eliminating the need for a separate extraction tool. The 74108 is packaged in a quantity of 4, making it practical for shop stock or field kit use. Its stub length is ideal for applications where clearance is limited and bit deflection must be minimized.

Key Features

• Left-hand flute direction for broken fastener extraction during drilling
• Cobalt steel construction for improved heat and wear resistance
• 135-degree split point reduces bit walking and lowers feed pressure requirements
• Stubby mechanics length provides additional rigidity and strength
• Industrial polished finish aids chip evacuation
• Packaged in a quantity of 4 per unit

Compatibility

Designed as an OEM-style replacement and shop-stock cobalt stub drill bit for use in standard 3/8-inch or larger reversing drill chucks in mechanical, automotive, and metal fabrication applications.

Installation Notes

Installation of left-hand drill bits should be performed by qualified mechanics or machinists familiar with broken fastener extraction procedures. Always secure the workpiece before drilling and use appropriate cutting fluid when drilling hardened metals to extend bit life. Ensure the drill is set to reverse rotation before use; running a left-hand bit in forward rotation negates its extraction benefit and accelerates wear. Eye protection and appropriate PPE should be worn at all times during operation.