Chicago-latrobe 50596 Extra Length Drill Bit 9/16 in Hss

Product Description

The CHICAGO-LATROBE 50596 is a 9/16-inch (0.5625 inches) diameter extra length drill bit designed for deep-hole and long-reach drilling applications. Built from high speed steel with an oxide finish, it features a 12-inch overall length and a 9-inch spiral flute for extended reach into workpieces that standard-length bits cannot access. The 118-degree notched point with web thinning reduces thrust at entry and improves chip evacuation. Two right-hand spiral flutes and a tapered web configuration keep the bit tracking straight through cast iron and steel. Licensed trades and machining professionals rely on this series for structural fabrication, mechanical contracting, and maintenance work where deep clearance is required.

The 50596 belongs to CHICAGO-LATROBE Series 120X, a general-purpose extra length line suited for production and field drilling in ferrous metals. Primary workpiece materials are cast iron and steel. The straight cylindrical shank measures 0.5625 inches in diameter with a 3-inch shank length, making it compatible with standard drill chucks found on portable drills, drill presses, and magnetic base drills. It is well suited to HVAC equipment fabrication, structural steel work, and mechanical equipment installation where access depth exceeds the reach of jobber-length bits.

Key Features

• High speed steel construction for durability in cast iron and steel applications
• Oxide finish reduces friction and provides corrosion resistance during storage and use
• 118-degree notched point with web thinning for reduced entry thrust and improved centering
• 9-inch spiral flute length and 12-inch overall length for long-reach drilling
• Straight cylindrical shank at 0.5625 inches diameter fits standard drill chucks
• Diameter tolerance of +0.0000 to -0.0012 inches for consistent, on-size holes
• Right-hand cutting direction with regular spiral and tapered web for stable chip flow

Compatibility

Designed as a general-purpose extra length drill bit for use in standard drill chucks and drill press spindles accepting straight cylindrical shanks. Rated for drilling cast iron and steel. No specific OEM machine compatibility was stated in the product data.

Installation Notes

Secure the shank fully in a properly tightened drill chuck before operation. Use cutting fluid or coolant when drilling steel to extend bit life and maintain hole tolerance. Reduce feed pressure as the bit breaks through the exit side of the workpiece to prevent grab or deflection. Inspect the cutting edges for wear between uses, particularly on extended-reach applications where bit flex and heat buildup are greater than with jobber-length bits.