Chicago-latrobe 48545 Screw Machine Drill Bit 45/64 in

Product Description

The CHICAGO-LATROBE 48545 is a screw machine length drill bit designed for general-purpose drilling in metal fabrication, machining, and maintenance applications. It features a 45/64 inch (0.7031 inch) diameter with a 118-degree standard point angle and a two-flute spiral configuration. The bit is manufactured from high speed steel with a coated finish for improved wear resistance. Web thinning reduces thrust load at the point, making it easier to start the cut and maintain accuracy. This bit is appropriate for machinists, tool-and-die technicians, and maintenance professionals working on production or repair tasks.

The 48545 is suited for drilling cast iron, non-ferrous metals, and steel in shop and field environments. Its screw machine length profile — shorter than a jobber-length bit — provides added rigidity and reduced deflection, which is valuable when working in drill presses, CNC machines, or turret lathes where stub-length tooling is preferred. The straight-cylindrical shank accepts standard drill chucks without adapters. The parallel web configuration maintains consistent cutting geometry through the full flute length.

Key Features

• 45/64 inch (0.7031 inch) diameter with a diameter tolerance of +0.0000 to -0.0012 inches
• 118-degree standard point angle with web thinning to reduce entry thrust
• Two-flute regular spiral design for efficient chip evacuation
• High speed steel construction with coated finish for extended tool life
• Screw machine (stub) length for greater rigidity compared to jobber-length bits
• Right-hand cut with straight-cylindrical shank for universal chuck compatibility

Compatibility

Designed for use with standard drill chucks on drill presses, lathes, CNC machining centers, and handheld drilling equipment that accept straight-cylindrical shank tooling in the 45/64 inch diameter range. Rated for drilling cast iron, non-ferrous metal, and steel workpieces.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Ensure the drill chuck is fully tightened and the workpiece is securely fixtured before operation. Always wear appropriate eye protection and follow applicable shop safety procedures. Do not exceed the recommended speed and feed rates for the workpiece material and bit diameter.