Chicago-latrobe 44471 Jobber Length Drill Bit Hss

Product Description

The CHICAGO-LATROBE 44471 is a jobber length drill bit designed for left-hand cutting applications in metalworking and general-purpose drilling. Manufactured from high speed steel with a bright uncoated finish, this bit measures 0.2280 inches in diameter (wire size No. 1) and carries a standard 118-degree drill point angle. The overall length is 3.875 inches with a 2.625-inch flute length, making it a compact, versatile bit suited for production and maintenance drilling. A web-thinned, tapered web design reduces thrust at entry. Licensed HVAC, plumbing, and mechanical contractors rely on this type of bit when removing seized fasteners or drilling pilot holes in ferrous components during equipment service.

The 44471 is built for drilling cast iron and steel in residential and commercial maintenance scenarios. The left-hand spiral flute configuration is particularly useful when extracting broken or stripped fasteners, as the cutting action applies counter-clockwise torque that can back out damaged screws during drilling. The straight-cylindrical shank is compatible with standard three-jaw drill chucks. This bit is part of Chicago-Latrobe Series 150L, a general-purpose line engineered for consistent performance across a range of ferrous workpiece materials.

Key Features

• Left-hand cut spiral flute for counter-clockwise drilling and fastener extraction
• 118-degree standard point angle for general-purpose entry on steel and cast iron
• High speed steel construction with bright uncoated finish
• Web-thinned tapered web reduces drilling thrust and improves chip clearance
• Straight-cylindrical shank fits standard three-jaw chucks without adapters
• No. 1 wire size (0.2280 inches) with tight diameter tolerance of -0.0007 to 0.0000 inches

Compatibility

Designed as a general-purpose replacement or service bit compatible with standard three-jaw drill chucks accepting a 0.2280-inch straight-cylindrical shank. Primary workpiece materials are cast iron and steel as specified in Series 150L product data.

Installation Notes

This bit is installed by machinists, millwrights, and trade professionals using standard corded or cordless drill/drivers with a keyed or keyless three-jaw chuck. Always secure the workpiece before drilling and confirm the drill is set to reverse rotation to engage the left-hand cut. Wear appropriate eye protection and ensure cutting speed is appropriate for the workpiece material and bit diameter. Do not force the bit through hardened material grades beyond the general-purpose rating of high speed steel.