Chicago-latrobe 55450 Reduced Shank Drill Bit 25/32 in

Product Description

The CHICAGO-LATROBE 55450 is a reduced shank twist drill bit designed for portable drilling applications in wood, alloy steel, carbon steel, and cast iron. The bit features a 25/32-inch cutting diameter with a 1/2-inch straight-cylindrical shank, allowing it to be chucked in standard 1/2-inch capacity drill chucks despite the larger cutting diameter. Constructed from high speed steel with a coated finish, it carries a 118-degree standard point angle suited for general-purpose drilling. With a 6-inch overall length and a 3-1/8-inch flute length, this right-hand cut bit handles a wide range of production and field drilling tasks.

The 55450 is used in residential and light commercial applications where a larger bore diameter is required but only a 1/2-inch chuck is available. Typical install scenarios include rough carpentry, pipe penetration prep, structural steel work, and general fabrication. The two-flute spiral design with regular helix provides adequate chip evacuation in both ferrous metals and wood. This bit is cataloged under Chicago-Latrobe Series 190 and is sized for general-purpose portable drilling without coolant.

Key Features

• Reduced shank design: 25/32-inch cutting diameter with 1/2-inch shank fits standard 1/2-inch chucks
• High speed steel construction for durability across ferrous and non-ferrous materials
• 118-degree standard point angle for general-purpose entry in wood, carbon steel, alloy steel, and cast iron
• Coated finish for improved wear resistance and surface protection
• Right-hand cut, two-flute spiral design promotes consistent chip clearing
• No coolant required — suitable for portable and handheld drilling operations

Compatibility

Designed as a general-purpose reduced shank drill bit compatible with portable drills and drill presses equipped with a 1/2-inch capacity chuck. Suitable for use in wood, alloy steel, carbon steel, and cast iron workpieces per Series 190 application guidelines.

Installation Notes

Insert the 1/2-inch straight shank fully into the chuck and tighten securely before drilling. Confirm the drill press or handheld drill is powered off and unplugged before changing bits. Apply steady, consistent feed pressure and allow the flutes to clear chips naturally — forcing the bit increases heat buildup and shortens tool life. No coolant is required for typical applications, but reducing feed rate when drilling harder alloy steels will extend bit life.