Chicago-latrobe 44422 Jobber Drill Bit 11/32 in Left Hand Hss

Product Description

The CHICAGO-LATROBE 44422 is a left-hand cut, jobber-length drill bit designed for general-purpose drilling in ferrous materials. Manufactured from high-speed steel (HSS) with a bright, uncoated finish, it measures 11/32 inch (0.3438 inch) in diameter with a 4-3/4 inch overall length and a 3-7/16 inch flute length. The 118-degree standard point angle and regular spiral flute geometry suit common metal-removal applications. The web-thinned, tapered web reduces thrust and improves chip evacuation. This bit is part of the Series 150L line and is used by machinists, pipefitters, and maintenance technicians who require left-hand cutting direction for broken fastener extraction or reverse-rotation drilling setups.

Left-hand drill bits are most commonly used to extract broken bolts, studs, and screws in metal workpieces. As the bit contacts the fastener under reverse rotation, the cutting force often backs out the broken piece before a full hole is drilled. This makes the 44422 a standard tool in industrial maintenance shops, commercial HVAC service, and plumbing rough-in work where broken fasteners in cast iron or steel must be removed without damaging the surrounding material. The straight-cylindrical shank is compatible with standard drill chucks.

Key Features

• Left-hand cutting direction for broken fastener extraction under reverse rotation
• High-speed steel construction for drilling cast iron and steel
• Bright, uncoated finish suitable for general-purpose applications
• Web-thinned, tapered web reduces drilling thrust and improves chip flow
• 118-degree standard point angle for broad material compatibility
• Straight-cylindrical shank fits standard 3-jaw drill chucks

Compatibility

Designed for general-purpose drilling in cast iron and steel workpieces. Compatible with any standard drill chuck accepting an 11/32 inch straight-cylindrical shank. Intended for use in reverse-rotation drilling applications or standard left-hand cutting setups.

Installation Notes

Left-hand drill bits require a reversible drill or drill press set to reverse (counterclockwise) rotation to cut properly. Power down and de-energize any equipment before drilling into it for fastener extraction. Secure the workpiece firmly before drilling to prevent movement. Follow applicable shop safety standards and wear appropriate eye protection when operating rotary cutting tools.