Chicago-latrobe 50546 Extra Length Drill Bit 0.42 in Hss

Product Description

The CHICAGO-LATROBE 50546 is a high speed steel extra length drill bit designed for long reach drilling applications where standard-length bits fall short. Built to Series 120X specifications, it features a 0.42 inch diameter, a 10 inch overall length, and a web-thinned notched point at 118 degrees for easier penetration and reduced feed force. The oxide finish provides mild lubricity and corrosion resistance during operation. A right-hand spiral flute with a 7.5 inch flute length clears chips efficiently even at extended depths. This bit is suited for installation by machinists, maintenance technicians, and fabricators working in production and field environments.

The 50546 is intended for long reach drilling into cast iron and steel workpieces where a standard jobber-length bit cannot reach the required depth. The straight-cylindrical shank seats reliably in standard drill chucks and machine spindles without adapter sleeves. A tapered web configuration with web thinning reduces thrust requirements and makes it practical for both drill press and hand-held power tool use in demanding fabrication and maintenance scenarios.

Key Features

• Extra length design with 10 inch overall length for deep and long reach drilling
• High speed steel construction rated for cast iron and steel workpieces
• 118 degree notched point with web thinning reduces entry force and improves centering
• 7.5 inch spiral flute length provides extended chip evacuation over full drilling depth
• Oxide finish adds surface lubricity and mild corrosion resistance
• Straight-cylindrical shank with 0.4219 inch diameter fits standard drill chucks without adapters

Compatibility

Designed as an OEM-style general purpose extra length drill bit for use in standard drill chucks and machine spindles accepting a straight-cylindrical shank; primary workpiece materials are cast iron and steel per Series 120X specifications.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with drill press, CNC, or hand-held power tool operation. Secure the straight-cylindrical shank fully in the chuck before applying feed pressure to prevent runout. Reduce spindle speed relative to standard-length bits of the same diameter to compensate for increased deflection potential at extended lengths. Follow applicable shop safety protocols and California Proposition 65 handling guidelines as noted by the manufacturer.