Chicago-latrobe 55251 Taper Length Drill Bit 19/64 in

Product Description

The CHICAGO-LATROBE 55251 is a taper length high speed steel drill bit designed for heavy-duty metal drilling in industrial and trade applications. Built on the Series 120DHT platform, it features a 135-degree split point that eliminates walking and enables self-centering without a center punch. The parabolic flute geometry clears chips aggressively, reducing heat buildup and allowing faster feed rates compared to standard flute designs. At 0.2969 inches (19/64 inch) in diameter with a web-thinned, tapered web configuration, this bit is suited for drilling alloy steel, carbon steel, aluminum, and other non-ferrous metals where precision and tool life matter.

This drill bit is intended for use in machine shop environments, maintenance and repair operations, and fabrication work requiring consistent hole quality in metallic materials. The tanged shank provides positive drive engagement in drill chucks and compatible taper-shank holders. The coated finish extends cutting life when working through harder alloy steels or abrasive carbon steel stock. At 6.375 inches overall length with a 5.125-inch flute length, it provides reach beyond what a jobber-length bit offers, making it useful for drilling through thicker workpieces or recessed areas.

Key Features

• 135-degree split point for self-centering entry with no center punch required
• Parabolic flute design for aggressive chip evacuation and reduced heat at the cutting edge
• Web-thinned tapered web configuration lowers thrust and improves penetration in hard materials
• High speed steel construction handles alloy steel, carbon steel, aluminum, and non-ferrous metals
• Coated finish extends tool life in demanding cutting applications
• Tanged shank ensures positive drive and secure chuck engagement

Compatibility

Designed as a heavy-duty OEM-style taper length drill bit compatible with standard drill chucks and tanged-shank taper holders accepting a 0.2969-inch shank diameter. Rated for material applications including alloy steel, aluminum, carbon steel, and non-ferrous metals per manufacturer specification.

Installation Notes

Installation and use should be performed by machinists, tool and die technicians, or qualified tradespeople familiar with metal drilling operations. Secure the workpiece firmly before drilling and verify chuck or holder engagement before running the spindle. Follow machine manufacturer speed and feed recommendations for the material being drilled. Inspect the cutting edge and coating for wear before each use and replace the bit if chipping or excessive wear is observed.