Chicago-latrobe 53440 Cobalt Reduced Shank Drill Bit 5/8 in

Product Description

The CHICAGO-LATROBE 53440 is a reduced shank cobalt drill bit engineered for portable drilling in ferrous metals and hard materials. It features a 5/8 inch cutting diameter with a 1/2 inch straight-cylindrical shank, allowing it to fit standard 1/2 inch chucks while drilling oversized holes. The 118-degree split point promotes fast penetration and reduces walking on entry. Built from cobalt tool steel with a coated finish, this bit handles heat and wear better than standard high-speed steel, making it a dependable choice for production or job-site drilling where tool life matters.

The 53440 is suited for general-purpose portable drilling in cast iron, carbon steel, alloy steel, and similar ferrous workpiece materials. With a 3-1/8 inch flute length and 6 inch overall length, it provides adequate reach for deeper hole applications without sacrificing rigidity. The right-hand spiral flute geometry evacuates chips efficiently during through-hole and blind-hole operations. Tradespeople and machinists working in fabrication, maintenance, or field service applications will find this bit fits standard portable drill presses and handheld drill motors equipped with a 1/2 inch chuck.

Key Features

• Reduced shank design: 5/8 inch cutting diameter fits into standard 1/2 inch chucks
• Cobalt tool steel construction for elevated heat resistance and extended tool life in hard metals
• 118-degree split point for fast starts and reduced thrust force
• Coated finish increases surface hardness and lubricity
• Right-hand, regular spiral flute with 2-flute configuration for efficient chip evacuation
• Diameter tolerance of +0.0000 to -0.0012 inches for consistent hole sizing

Compatibility

Designed for portable drilling applications in cast iron, steel, alloy steel, and carbon steel workpieces. Compatible with any drill motor or drill press equipped with a 1/2 inch chuck capacity.

Installation Notes

Install this bit into a 1/2 inch drill chuck and tighten securely with a chuck key before operation. Always wear appropriate eye protection and secure the workpiece before drilling. Use cutting fluid or coolant where recommended by the workpiece material to maximize bit life, noting this bit is rated for dry operation. Inspect the cutting edges for wear or chipping before each use and replace if the split point or flute geometry is compromised.