Chicago-latrobe 50540 Extra Length Drill Bit 0.4062 in Hss

Product Description

The CHICAGO-LATROBE 50540 is an extra length high speed steel drill bit designed for long reach drilling applications in industrial and trade environments. It measures 0.4062 inches in diameter with an 8-inch overall length and a 5.5-inch flute length, giving it the reach needed to bore deep holes that standard-length bits cannot access. The 118-degree notched point with web thinning reduces entry force and improves chip clearance. The oxide finish provides a baseline layer of lubricity and corrosion resistance. This bit is part of the Series 120X line and is intended for use by machinists, pipefitters, ironworkers, and general trade professionals working in metal fabrication or mechanical assembly.

This drill bit is engineered for drilling into cast iron and steel in scenarios where extended reach or deep hole geometry is required. The straight-cylindrical shank fits standard drill chucks without adapters. The right-hand spiral flute with regular spiral type promotes consistent chip evacuation during through-hole drilling. Typical applications include structural steel work, heavy equipment maintenance, and fabrication shop operations where standard-length bits fall short of the required depth.

Key Features

• Extra length design at 8 inches OAL enables long reach drilling beyond standard bit capability
• 118-degree notched point with web thinning reduces thrust and improves centering on hard metals
• High speed steel construction maintains hardness at elevated cutting temperatures
• Oxide finish provides lubricity and mild corrosion resistance
• Tapered web configuration with 2-flute spiral design promotes efficient chip removal
• Straight-cylindrical shank fits standard drill chucks with no adapter required

Compatibility

Designed for drilling cast iron and steel. Compatible with standard drill chucks accepting a 0.4062-inch straight-cylindrical shank. Intended for general purpose long reach drilling applications.

Installation Notes

This bit is installed by machinists and trade professionals using standard drill presses, magnetic drills, or hand drills with appropriate chuck capacity. Secure the workpiece firmly before drilling to prevent walking or deflection at depth. Use appropriate cutting fluid when drilling steel to extend bit life and reduce heat buildup. Inspect the cutting edges and web condition before each use; discard or resharpen bits showing excessive wear or chipping.