Chicago-Latrobe 48923 Screw Machine Drill Bit 23/64 in 118 Degrees

Chicago-Latrobe 48923 Drill Bit

The Chicago-Latrobe 48923 is a screw machine drill bit sized at 23/64 in with a decimal equivalent of 0.3594. It features a 118 degree conventional point angle and is constructed from high speed steel with a bright uncoated finish. This left hand cutting tool is designed for precision drilling tasks in a workshop or maintenance environment. It suits machinists and technicians who require a specific fractional size for screw machine applications.

Sustained Cutting Performance

The high speed steel construction provides consistent hardness for extended drilling cycles without rapid edge degradation. The 118 degree point angle supports steady centring and chip evacuation during continuous operation in suitable materials. As a non-coolant through design, heat management relies on external lubrication or peck drilling cycles to maintain performance over long production runs. The left hand cutting direction is specialised for specific operations such as removing broken fasteners or machining left hand threads.

Interface and Application Limits

The straight shank fits standard drill chucks and screw machine holders compatible with the 23/64 in diameter. The bright finish offers no coating barrier, limiting effectiveness in highly abrasive or high temperature alloys without supplemental coolant. Left hand rotation restricts use to machines capable of reverse spindle direction or dedicated left hand tapping heads. The conventional point geometry is not self centring on curved or hardened surfaces, requiring a centre drill or pilot hole for accurate starts.