Chicago-latrobe 50514 Extra Length Drill Bit 0.3438 in Hss

Product Description

The CHICAGO-LATROBE 50514 is an extra length, high speed steel drill bit engineered for long reach drilling applications where standard-length bits cannot access the work zone. The bit measures 0.3438 inches in diameter with an overall length of 8 inches, giving technicians the extended reach needed to bore through deep or obstructed sections of cast iron and steel workpieces. A 118-degree notched point with web thinning reduces thrust and improves centering accuracy at the start of each hole. The oxide finish provides baseline corrosion resistance and helps retain cutting-edge lubricity during dry or lightly lubricated operations. This bit is appropriate for machinists, tool-and-die workers, pipefitters, and HVAC or mechanical tradespeople performing long-reach metalwork in structural or equipment assemblies.

The CHICAGO-LATROBE 50514 is suited for production and maintenance drilling in cast iron and steel across residential and light commercial mechanical applications. Its straight-cylindrical shank fits standard drill chucks and magnetic base drill setups without adapters, making it a straightforward drop-in for existing tooling. The 5.5-inch spiral flute length clears chips efficiently in deep-hole operations, reducing the need for repeated peck cycles in most setups. Series 120X designates this bit within the CHICAGO-LATROBE extended-length general-purpose lineup.

Key Features

• 0.3438-inch diameter with diameter tolerance of +0.0000 to -0.0010 inches for consistent hole sizing
• 8-inch overall length with 5.5-inch flute length for deep, long-reach bore access
• 118-degree notched point with web thinning reduces entry thrust and improves hole start accuracy
• High speed steel construction handles cast iron and steel at general-purpose cutting speeds
• Oxide finish adds corrosion resistance and light lubricity for extended tool life
• Right-hand spiral flute with tapered web design promotes efficient chip evacuation in deep holes

Compatibility

Designed for long-reach drilling in cast iron and steel workpieces; straight-cylindrical shank is compatible with standard drill chucks accepting 0.3438-inch shank diameters.

Installation Notes

Installation of this bit requires a drill press, handheld power drill, or magnetic base drill with a chuck rated for the 0.3438-inch straight shank diameter. Secure the workpiece firmly before drilling to prevent walking on entry; the notched point aids self-centering but does not eliminate the need for proper workpiece fixturing. Use appropriate cutting fluid or coolant when drilling steel to extend bit life and maintain dimensional accuracy. This product is subject to California Proposition 65 warnings; follow applicable shop safety requirements when machining ferrous metals.