Chicago-latrobe 55433 Reduced Shank Drill Bit 33/64 in

Product Description

The CHICAGO-LATROBE 55433 is a reduced shank twist drill bit designed for general-purpose portable drilling in metal, wood, and cast iron. The bit has a 33/64 inch (0.5156 inch decimal) cutting diameter with a 1/2 inch straight-cylindrical shank, allowing it to chuck into standard 1/2 inch drill chucks without requiring a larger chuck capacity. The 118-degree standard point angle suits common shop and field drilling tasks. Made from high speed steel with a coated finish, the 55433 handles the heat and abrasion typical of production and maintenance drilling applications. The tool is part of the Chicago-Latrobe Series 190 line.

This bit is suited for portable drilling in residential and light commercial maintenance, fabrication, and construction settings. Typical applications include drilling through alloy steel, carbon steel, cast iron, and wood. The reduced shank design is specifically useful when a drill press or portable drill is equipped with a 1/2 inch chuck but the required hole size exceeds 1/2 inch. Trades including HVAC, plumbing, electrical, and general fabrication crews use reduced shank bits for this reason.

Key Features

• 33/64 inch cutting diameter with 1/2 inch reduced shank for standard chuck compatibility
• 118-degree standard point angle for general-purpose entry on metal and wood
• High speed steel construction for heat and wear resistance during continuous use
• Coated finish for added surface protection and reduced friction
• Right-hand spiral flute with 3-1/8 inch flute length clears chips efficiently
• Diameter tolerance of plus 0.0000 to minus 0.0012 inches for consistent hole sizing

Compatibility

Designed as a general-purpose reduced shank drill bit compatible with 1/2 inch drill chucks on portable drills and drill presses. Suitable for use in alloy steel, carbon steel, cast iron, and wood workpieces.

Installation Notes

Insert the 1/2 inch shank fully into the chuck and tighten securely with a chuck key before operating. Wear appropriate eye protection when drilling metal or cast iron. Power down and de-energize any equipment being drilled into before starting work. Use appropriate cutting fluid or lubrication when drilling ferrous metals to extend bit life and maintain hole quality.