Chicago-latrobe 44477 Jobber Drill Bit 7 Left Hand Hss

Product Description

The CHICAGO-LATROBE 44477 is a jobber-length drill bit in wire size 7 (0.2010 inches decimal), designed for left-hand cutting applications in ferrous materials. Manufactured from high-speed steel with a bright uncoated finish, this bit features a 118-degree standard point angle and a regular spiral flute pattern. The two-flute design with a tapered web and web-thinned point aids chip evacuation and reduces entry thrust. At 3.625 inches overall length with a 2.4375-inch flute length, it fits standard drill chucks and is suited for general-purpose drilling in production and maintenance environments.

This bit is intended for use on cast iron and steel workpieces in residential and light industrial settings. The left-hand cutting direction makes it particularly useful when extracting broken fasteners or working with reverse-rotation equipment. The straight-cylindrical shank with a 0.2010-inch diameter seats securely in conventional three-jaw chucks. It is a general-purpose grade tool appropriate for machine shops, HVAC fabrication work, plumbing rough-in, and field service environments where left-hand bits are a standard part of the toolkit.

Key Features

• Wire size 7 — 0.2010-inch decimal diameter for precise hole sizing
• Left-hand cut for use in reverse-rotation applications and broken-fastener extraction
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust
• High-speed steel construction — handles ferrous materials including cast iron and steel
• Bright uncoated finish — allows visual wear inspection during service
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed for use in standard three-jaw drill chucks accepting a 0.2010-inch straight-cylindrical shank. Primary workpiece materials are cast iron and steel. Part of the Chicago-Latrobe Series 150L jobber-length left-hand drill bit line.

Installation Notes

Install and remove drill bits only when the drill or drill press is fully powered down and the chuck is stationary. Confirm the chuck is rated for the shank diameter before seating the bit. Left-hand bits require a reverse-rotation spindle setting — verify spindle direction before engaging the workpiece. Use appropriate cutting fluid or coolant for steel workpieces to extend tool life and maintain hole tolerance.