Chicago-latrobe 48909 9/64 in Hss Left Hand Drill Bit

Product Description

The CHICAGO-LATROBE 48909 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in a range of soft to medium materials. Built from high-speed steel (HSS) with a bright uncoated finish, this bit runs a 118-degree standard point angle and features a left-hand cutting direction — making it particularly useful for removing broken fasteners or performing drilling operations on reverse-rotating setups. The screw machine length body keeps the bit short and rigid for improved accuracy in production and bench-drill applications. Overall length is 1-15/16 inches with a straight shank diameter of 0.1406 inches.

This bit is suited for use on aluminum, copper, magnesium, slate, thermoplastic, and wood. Its compact screw machine length is commonly used in drill press work, turret lathe operations, CNC production environments, and manual bench drilling where stub-length rigidity reduces deflection and runout. The left-hand spiral also aids chip ejection in certain setups and can back out loosened or broken fasteners during the drilling process. General-purpose grade performance fits both production and maintenance-repair applications.

Key Features

• Left-hand cutting direction for reverse-rotation drilling and broken fastener extraction
• 118-degree standard point angle with web-thinned tip for reduced thrust and easier starting
• HSS construction with bright uncoated finish for general-purpose use across multiple materials
• Screw machine (stub) length body for increased rigidity and reduced deflection
• Regular spiral flute with parallel web configuration for consistent chip evacuation
• Straight shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill press, CNC, turret lathe, and hand-drill setups that accept a 0.1406-inch straight shank. Suitable for drilling aluminum, copper, magnesium, slate, thermoplastic, and wood workpieces.

Installation Notes

Install and remove this bit with the drill or machine powered off and fully stopped. Secure the straight shank firmly in the chuck before beginning any operation. Left-hand bits require a reverse-rotating spindle to cut; confirm machine direction before use. Follow standard shop safety practices including eye protection and appropriate workholding when drilling.