Chicago-latrobe 48930 Screw Machine Drill Bit 15/32in Hss

Product Description

The CHICAGO-LATROBE 48930 is a screw machine length drill bit designed for left-hand cutting in general-purpose drilling applications. Built from high-speed steel (HSS) with a bright, uncoated finish, it measures 15/32 inches (0.4688 inches) in diameter and 3-5/8 inches overall length. The 118-degree standard point angle and web-thinned geometry reduce entry resistance and improve chip evacuation. With a regular spiral flute and straight shank, this bit mounts in standard drill chucks and screw machine setups. Machinists, tool and die techs, and maintenance professionals typically reach for this bit when left-hand extraction of broken fasteners or reverse-drilling operations are required.

The 48930 is suited for drilling aluminum, copper, magnesium, slate, thermoplastic, and wood. Its screw machine length body keeps the drill compact for use in tight setups and production environments where rigidity and short stick-out matter. The left-hand cutting direction also makes it a practical choice when used alongside left-hand taps or for backing out damaged screws without additional extraction tooling. Shank diameter matches the drill diameter at 0.4688 inches, providing consistent chuck engagement.

Key Features

• Left-hand cutting direction for reverse drilling and broken fastener removal
• HSS construction with bright, uncoated finish for general-purpose performance
• 118-degree standard point angle with web-thinned tip for reduced thrust
• Regular spiral flute, 2-1/8 inches flute length, promotes smooth chip flow
• Screw machine length body at 3-5/8 inches OAL for compact, rigid setups
• Straight shank at 0.4688 inches diameter fits standard drill chucks

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard straight-shank drill chucks and screw machine drill presses. Primary workpiece materials include aluminum, copper, magnesium, slate, thermoplastic, and wood per manufacturer specifications.

Installation Notes

Install and remove this bit only with the machine fully powered down and the chuck key removed from the chuck. Secure the straight shank firmly in the drill chuck before operation to prevent slipping under cutting load. Left-hand bits require the spindle to run in reverse; confirm spindle direction before engaging the workpiece. Eye protection and appropriate work-holding are required per standard shop safety practice.