Cleveland C11408 Cobalt Jobber Drill Bit Wire 8 135 Deg

Product Description

The CLEVELAND C11408 is a cobalt jobber-length drill bit designed for demanding metal-cutting applications in trade and industrial environments. Built to M42 cobalt steel specification, it carries a TiAlN coating that extends tool life under high heat and friction. The split point tip at 135 degrees reduces walking and enables fast penetration without a center punch on most surfaces. At 3.625 inches overall length with a 2.4375-inch flute, it fits standard drill chucks and magnetic drill setups. Machinists, pipefitters, ironworkers, and maintenance mechanics reach for this bit when cutting hard ferrous metals that wear out standard high-speed steel tooling.

The C11408 is sized to wire gauge Number 8, with a decimal diameter of 0.1990 inches, placing it in the 0.1500 to 0.2000 inch range. Primary target materials are stainless steel and cast iron, where cobalt and TiAlN coating deliver the thermal resistance needed for clean, consistent holes. Parabolic flute geometry clears chips efficiently during deep-hole drilling, reducing the need to peck repeatedly. Right-hand cutting direction is standard for conventional drill press, hand drill, and magnetic drill applications.

Key Features

• M42 cobalt steel construction for heat resistance in hard-metal drilling
• TiAlN coating reduces friction and extends edge life in stainless steel and cast iron
• 135-degree split point minimizes walking and lowers feed force required
• Parabolic flute geometry promotes fast chip evacuation in deep holes
• Web-thinned, tapered web configuration reduces cutting resistance at the tip
• Straight cylindrical shank fits standard drill chucks without adapters
• ANSI specification compliance for dimensional consistency

Compatibility

Designed as a heavy-duty jobber drill for use in standard drill presses, hand drills, and magnetic base drills accepting straight-shank bits at 0.1990 inches diameter. Optimized for stainless steel and cast iron workpieces.

Installation Notes

Installation of this drill bit should be performed by a qualified machinist, pipefitter, or maintenance mechanic familiar with metal-cutting operations. Secure the shank fully in the chuck and verify concentricity before beginning a cut. Always use appropriate cutting fluid or coolant when drilling stainless steel to manage heat buildup, even though this bit does not support through-coolant delivery. Wear ANSI-rated eye protection and secure the workpiece before drilling.