Chicago-latrobe 52457 Reduced Shank Drill Bit 57/64 in

Product Description

The CHICAGO-LATROBE 52457 is a reduced shank twist drill bit designed for portable drilling applications in metal, wood, and cast iron. The bit features a 57/64 inch (0.8906 inch decimal) cutting diameter paired with a 1/2 inch Weldon shank, allowing it to run in standard 1/2 inch chuck equipment while maintaining a larger cutting diameter. Built from high speed steel with a coated finish, the 52457 carries a 118-degree split point that starts on contact without walking. Overall length is 6 inches with a 3-1/8 inch flute length, and the right-hand spiral flutes clear chips efficiently during through-hole work.

This bit is sized for general-purpose portable drilling where a full-size shank would exceed the chuck capacity of the tool on hand. Typical applications include field drilling in alloy steel, carbon steel, cast iron, and wood. The Weldon shank with three flats prevents rotation under torque load, making it a reliable choice for heavy-feed drilling in fabrication, maintenance, and mechanical service environments where hand-held or portable mag-drill setups are common.

Key Features

• 57/64 inch cutting diameter (0.8906 inch decimal) with a reduced 1/2 inch Weldon shank for use in standard 1/2 inch chuck equipment
• 118-degree split point starts on contact and reduces thrust requirement compared to conventional points
• High speed steel construction handles alloy steel, carbon steel, cast iron, and wood
• Three-flat Weldon shank resists slippage under high torque loads
• Coated finish extends tool life and reduces friction during cutting
• Right-hand, regular spiral flutes with 3-1/8 inch flute length for effective chip evacuation

Compatibility

Designed as an OEM-style general-purpose reduced shank drill bit suitable for portable drilling equipment with a 1/2 inch Weldon-style chuck or collet. Rated for use in wood, alloy steel, carbon steel, and cast iron workpiece materials per Series 190F specifications.

Installation Notes

Installation and use of this bit should be performed by qualified machinists, mechanics, or trade professionals familiar with portable drilling equipment. Secure the Weldon shank fully in the chuck or collet, ensuring all three flats are properly engaged before applying load. Always wear appropriate eye protection and secure the workpiece before drilling. Disconnect or de-energize the drill before changing bits or adjusting the chuck.