Chicago-latrobe 44513 Jobber Drill Bit Wire 43 Left Hand Hss

Product Description

The CHICAGO-LATROBE 44513 is a jobber-length drill bit designed for left-hand cutting in general-purpose drilling applications. It is manufactured from high-speed steel with a bright uncoated finish and carries a wire gauge size of 43, corresponding to a decimal diameter of 0.0890 inches. The 118-degree standard point angle and web-thinned, tapered web configuration reduce entry force and improve centering on ferrous workpieces. With an overall length of 2.25 inches and a flute length of 1.25 inches, this bit fits standard drill chucks and reversible drill motors commonly used by machinists, pipefitters, and maintenance technicians.

This bit is suited for drilling into cast iron and steel in situations where left-hand rotation is required, such as removing broken fasteners or drilling with a reversing drill motor. The straight-cylindrical shank with a diameter of 0.0890 inches seats securely in keyless or keyed chucks without slippage. It is a Series 150L general-purpose tool intended for both shop and field use where a small-diameter, left-hand bit is needed in light metalworking or mechanical service tasks.

Key Features

• Left-hand cutting direction for use with reversing drill motors and broken-fastener extraction
• Wire size 43 (0.0890 inches) with a diameter tolerance of -0.0005 to 0.0000 inches for consistent hole sizing
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust and self-centering entry
• High-speed steel construction with bright uncoated finish suitable for cast iron and steel
• Regular spiral flute with 2 flutes for efficient chip evacuation in short-hole drilling
• Straight-cylindrical shank compatible with standard drill chucks

Compatibility

Designed as a general-purpose left-hand jobber-length drill bit for use in standard reversible drill motors and drill presses that accept straight-cylindrical shanks. Primary workpiece materials are cast iron and steel.

Installation Notes

Installation and use of this bit should be performed by a qualified machinist or maintenance technician familiar with metalworking practices. Ensure the drill motor is set to reverse rotation before seating the bit, as left-hand bits require counterclockwise spindle direction to cut. Secure the workpiece firmly before drilling to prevent movement. Do not exceed the recommended feed rate for the bit diameter, and use appropriate cutting fluid when drilling steel to extend tool life.