Chicago-latrobe 50580 Extra Length Drill Bit 0.5156 in Hss

Product Description

The CHICAGO-LATROBE 50580 is an extra length high speed steel drill bit designed for long-reach drilling applications in metal fabrication, maintenance, and industrial service work. Built to Series 120X specifications, it features a 0.5156-inch diameter, a 10-inch overall length, and a 118-degree notched point angle. The oxide finish provides a basic level of surface protection during use. With a web-thinned, tapered web configuration and spiral flute design, the bit reduces thrust at entry and promotes chip evacuation in deeper holes. This bit is suited for machinists, maintenance technicians, and tradespeople who need extended reach beyond what standard-length bits can provide.

This bit is built for long-reach drilling in cast iron and steel workpieces. The 7.5-inch flute length and 10-inch overall length allow access to recessed hole locations or deep-stack applications where standard jobber bits fall short. The straight-cylindrical shank seats in standard drill chucks without requiring a specialized holder. Right-hand cutting direction is compatible with conventional drilling setups. General-purpose grade makes it appropriate for production and maintenance drilling across a range of ferrous materials.

Key Features

• 0.5156-inch diameter with a diameter tolerance of +0.0000 to -0.0012 inches for consistent hole sizing
• 10-inch overall length with 7.5-inch flute length for extended reach in deep or recessed drilling
• 118-degree notched point with web thinning reduces entry thrust and improves self-centering
• High speed steel construction handles cast iron and steel without coolant-through requirements
• Oxide finish on all flute and shank surfaces
• Straight-cylindrical shank with 0.5156-inch shank diameter fits standard drill chucks

Compatibility

Designed as a general-purpose extra length drill bit for use in standard drill chucks accepting a 0.5156-inch straight-cylindrical shank. Primary workpiece materials are cast iron and steel.

Installation Notes

Secure the straight-cylindrical shank firmly in a keyed or keyless drill chuck before operation. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Use cutting fluid or coolant on the workpiece surface when drilling steel to extend tool life, particularly at the full 10-inch depth of reach. Inspect the cutting edges and web-thinned point before each use and replace the bit if chipping or excessive wear is observed.