Chicago-latrobe 55258 Taper Length Drill Bit 13/32 in

Product Description

The CHICAGO-LATROBE 55258 is a heavy-duty taper length drill bit engineered for high-performance drilling in metals and non-ferrous materials. Built from high speed steel (HSS) with a coated finish, it measures 0.4062 inches (13/32 inch) in diameter and 7 inches overall length. The 135-degree split point geometry reduces walking and eliminates the need for a center punch on most flat surfaces. A parabolic flute design evacuates chips efficiently, making it well suited for deeper holes and interrupted cuts where chip packing is a concern. This bit is installed by machinists, tool-and-die technicians, and maintenance trades working on production or job-shop drilling operations.

The 55258 is rated for use in alloy steel, carbon steel, aluminum, and non-ferrous metals, covering the broad range of stock materials common in fabrication and maintenance environments. The tanged shank provides positive drive engagement in drill presses and tapping heads. With a flute length of 5.625 inches and a tapered web configuration, the bit maintains rigidity while still allowing deep-reach drilling without extension tooling. The right-hand cut direction is standard for conventional drill press and hand-drill use. Series 120DHT identifies this as part of a heavy-duty HSS taper length line designed for demanding production or repetitive drilling tasks.

Key Features

• 135-degree split point with web thinning for self-centering entry and reduced thrust
• Parabolic flute geometry promotes rapid chip evacuation in deep-hole drilling
• Heavy-duty HSS construction with coated finish for extended tool life in ferrous and non-ferrous stock
• Tapered web configuration maintains core strength across the full flute length
• Tanged shank provides positive drive engagement and prevents slippage under load
• Right-hand cut, suitable for standard drill press and handheld drill use

Compatibility

Designed for use in drill presses, magnetic base drills, and compatible tapping heads that accept a tanged-shank taper length bit with a 0.4062-inch shank diameter. Rated for drilling alloy steel, carbon steel, aluminum, and non-ferrous metals.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tradespeople familiar with metalworking equipment. Ensure the drill press or driving tool is fully stopped and de-energized before securing or removing the bit. Verify the chuck or holder is properly rated and sized for the tanged shank type before operation. Use appropriate cutting fluid for the workpiece material to maximize bit life and maintain dimensional tolerance.