Chicago-latrobe 52481 Reduced Shank Drill Bit 1-17/64 in

Product Description

The CHICAGO-LATROBE 52481 is a reduced shank twist drill bit designed for portable drilling applications in metal, cast iron, and wood. Built from high speed steel with a coated finish, it features a 1-17/64 inch (1.2656 inch decimal) cutting diameter and a 1/2 inch Weldon shank that reduces to fit standard chucks and portable drill setups. The 118-degree standard point angle is a general-purpose geometry suited to a wide range of workpiece materials. With a 3-flute Weldon shank and right-hand spiral fluting, this bit is engineered for consistent chip evacuation and secure tool holding during high-torque drilling operations.

The 52481 is suited for trade professionals performing portable drilling in the field or on the shop floor. Typical applications include drilling through alloy steel, carbon steel, cast iron, and wood in fabrication, maintenance, and mechanical service environments. The reduced shank design allows a larger cutting diameter to be driven by a standard 1/2 inch chuck without requiring a dedicated large-capacity machine spindle. Series 190F positioning places this bit in a general-purpose category appropriate for everyday production and service drilling tasks.

Key Features

• 1-17/64 inch cutting diameter with a diameter tolerance of +0.0000 to -0.0015 inches for consistent hole sizing
• 1/2 inch Weldon shank with 3 flats for positive engagement and slip resistance in portable drill chucks
• 118-degree standard point angle for general-purpose entry into steel, cast iron, and wood
• High speed steel construction with coated finish for extended service life across multiple workpiece materials
• Right-hand cut with regular spiral fluting for efficient chip removal during through-hole drilling
• Reduced shank design enables large-diameter drilling with standard 1/2 inch tooling

Compatibility

Designed as a general-purpose reduced shank drill bit compatible with 1/2 inch Weldon-style chuck systems used in portable and stationary drilling applications across wood, alloy steel, carbon steel, and cast iron workpieces.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists, maintenance technicians, or trade professionals familiar with portable and bench drilling equipment. Secure the Weldon shank fully in the chuck and verify the set screw engages one of the three flats before applying load. Always power down and de-energize the drill before bit changes. Use appropriate PPE including eye protection and secure workpiece clamping to prevent movement during drilling.