Chicago-latrobe 48540 Screw Machine Drill Bit 0.625 in

Product Description

The CHICAGO-LATROBE 48540 is a screw machine length drill bit designed for general-purpose drilling in metal and metalworking applications. Built from high speed steel (HSS) with a coated finish, this bit measures 0.625 inches in diameter with an overall length of 4.25 inches and a flute length of 2.75 inches. The 118-degree standard point angle and web-thinned tip reduce thrust and improve penetration on entry. The right-hand, regular spiral flute configuration handles chip evacuation efficiently across a range of workpiece materials. The shorter screw machine length body increases rigidity compared to a jobber-length bit, making it well suited for work in drill presses, CNC machines, and turret lathes.

This bit is intended for drilling cast iron, non-ferrous metals, and steel in production and maintenance environments. The straight-cylindrical shank fits standard drill chucks without adapters. It is a single-piece, general-purpose tool appropriate for machine shop, fabrication, and heavy trade work where a rigid, short-bodied bit reduces deflection and improves hole accuracy. Machinists, tool-and-die technicians, and industrial maintenance trades are the primary users of this bit style and size.

Key Features

• High speed steel construction with coated finish for extended wear resistance
• 118-degree standard point angle with web-thinned tip reduces entry thrust
• Screw machine (stub) length body at 4.25 inches overall increases rigidity over jobber-length bits
• Right-hand, regular spiral flute with parallel web for consistent chip flow
• Straight-cylindrical shank fits standard drill chucks without adapters
• Diameter tolerance of +0.0000 to -0.0012 inches meets ISO standards

Compatibility

Rated for use in cast iron, non-ferrous metal, and steel workpieces. Fits any drill chuck accepting a straight-cylindrical shank at 0.625 inches diameter. Conforms to ISO standards as noted in Series 157 specifications.

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before operation. Always use appropriate cutting fluid or coolant for the workpiece material to extend bit life, noting that this bit does not support coolant-through delivery. Wear appropriate PPE including eye protection when operating. Inspect the cutting edges for wear or chipping before each use and replace if the point geometry is degraded.