Chicago-latrobe 54051 Cobalt Drill Bit 9/64 in 135 Deg

Product Description

The CHICAGO-LATROBE 54051 is a cobalt jobber length drill bit designed for high-performance drilling in tough materials including stainless steel and hardened steels. Measuring 9/64 inches (0.1406 inches decimal) in diameter with a 135-degree split point, this bit cuts aggressively with less feed pressure than a conventional 118-degree point. The titanium nitride (TiN) coating adds surface hardness and heat resistance, extending tool life in demanding production and maintenance drilling applications. At 2-7/8 inches overall length with a 1-3/4 inch flute length, the 54051 fits standard drill chucks without modification. It is suited for machinists, fabricators, maintenance technicians, and HVAC and plumbing professionals who regularly work with corrosion-resistant alloys.

This drill bit is built for use in metal fabrication shops, mechanical rooms, and field service environments where stainless steel and high-alloy steel are common workpiece materials. The Series 2550 design meets DIN 338 and NAS 907 Type J standards, making it appropriate for aerospace-adjacent, industrial, and commercial mechanical applications. It is sold individually and fits into standard jobber-length drill sets and power drill equipment. Professionals drilling through pipe flanges, structural stainless components, or sheet metal assemblies will find this bit well-suited to the work.

Key Features

• M42 cobalt high-speed steel construction resists heat buildup when drilling stainless steel and hard alloys
• 135-degree split point reduces walking and lowers thrust required at bit entry
• Titanium nitride (TiN) coating increases surface hardness and extends cutting life
• Web-thinned, tapered web configuration improves chip evacuation and cutting efficiency
• Right-hand cut with regular spiral flute for standard drilling operations
• Meets DIN 338 and NAS 907 Type J standards for dimensional and performance compliance

Compatibility

Designed as a jobber-length replacement or addition for use with any standard straight-shank drill chuck accepting a 9/64-inch diameter bit. Primary workpiece materials are stainless steel and carbon steel as specified by the manufacturer.

Installation Notes

This drill bit is installed and operated by machinists, maintenance technicians, and trade professionals using handheld power drills or drill press equipment. Secure the straight-cylindrical shank firmly in a keyed or keyless chuck before operation. Use appropriate cutting fluid or lubricant when drilling stainless steel to manage heat and preserve coating life. Inspect the cutting edges before each use and replace the bit if chipping or dullness is observed, as a worn bit increases heat and can damage workpieces.