Chicago-latrobe 52445 Reduced Shank Drill Bit 45/64 in

Product Description

The CHICAGO-LATROBE 52445 is a reduced shank drill bit designed for portable drilling applications in wood, alloy steel, carbon steel, and cast iron. The bit measures 45/64 inch (0.7031 inch decimal) in cutting diameter with a 1/2 inch Weldon shank, making it compatible with standard 1/2 inch chuck equipment. Constructed from high speed steel with a coated finish, it features a 118-degree split point that improves bite on entry and reduces walking on smooth surfaces. The Series 190F designation places it in a general-purpose line suited for trade and industrial use. Overall length is 6 inches with a 3-1/8 inch flute length and a right-hand spiral cut.

This bit is built for portable drilling scenarios where a reduced shank allows a larger cutting diameter to be run through a 1/2 inch chuck. The Weldon shank with three flats resists rotational slippage under load, which matters on harder workpiece materials such as alloy steel and cast iron. Typical users include electricians, pipefitters, ironworkers, and general contractors who need an oversized hole in structural or mechanical assemblies without switching to a larger drill. The regular spiral flute geometry clears chips efficiently across all listed workpiece materials.

Key Features

• 45/64 inch cutting diameter (0.7031 inch decimal) with diameter tolerance of +0.0000 to -0.0012 inches
• 1/2 inch Weldon shank with three flats prevents slippage in chuck during high-torque drilling
• 118-degree split point improves self-centering and reduces thrust required at entry
• High speed steel construction with coated finish for general-purpose durability
• Right-hand cut, two-flute regular spiral geometry for efficient chip evacuation
• Suitable for wood, alloy steel, carbon steel, and cast iron workpieces

Compatibility

Designed for use in portable drills and drill presses equipped with a 1/2 inch chuck. Compatible workpiece materials listed by the manufacturer include wood, alloy steel, carbon steel, and cast iron. The Weldon shank format requires a chuck or holder machined to accept flat-drive shanks.

Installation Notes

Installation and use should be performed by qualified trade personnel familiar with drilling equipment and workpiece material requirements. Secure the Weldon shank fully in the chuck or Weldon-style holder so all three flats are engaged before applying power. Wear appropriate eye protection and secure the workpiece before drilling. Follow applicable OSHA and tool-manufacturer guidelines for portable drilling operations, including proper RPM selection for the workpiece material and bit diameter.