Chicago-latrobe 48541 Drill Bit 41/64 Inch Hss Screw Machine

Product Description

The CHICAGO-LATROBE 48541 is a screw machine length drill bit designed for general-purpose metal drilling in professional shop and field environments. Built from high speed steel with a coated finish, this bit runs at standard cutting speeds across a range of workpiece materials. The drill diameter is 41/64 inch (0.6406 inches) with a tight tolerance of +0.0000 to -0.0012 inches, ensuring consistent hole sizing. The 118-degree standard point angle and 2-flute spiral design provide efficient chip evacuation and stable entry without walking. Machinists, fabricators, and maintenance techs working with steel, cast iron, and non-ferrous metals are the primary users of this bit.

The 48541 is suited for drilling operations where a shorter flute length and reduced overall length improve rigidity and reduce deflection — characteristics that define screw machine length geometry. The overall length is 4-1/2 inches with a flute length of 2-7/8 inches. It fits standard drill chucks via its straight-cylindrical shank. This bit is appropriate for manual drill presses, CNC drilling operations, and handheld power drills where short-length bits are called for. Primary workpiece materials include steel, cast iron, and non-ferrous metals such as aluminum and brass.

Key Features

• 41/64 inch (0.6406 inches) diameter with tolerance of +0.0000 to -0.0012 inches for accurate hole sizing
• High speed steel construction with coated finish for improved surface hardness and wear resistance
• 118-degree standard point angle with web-thinned, parallel web configuration for reduced thrust and cleaner starts
• 2-flute regular spiral design promotes chip clearing in ferrous and non-ferrous materials
• Screw machine length geometry — shorter than jobber length — increases rigidity and reduces deflection
• Straight-cylindrical shank compatible with standard three-jaw drill chucks

Compatibility

Designed for general-purpose drilling in cast iron, non-ferrous metals, and steel workpieces as specified by Series 157 screw machine length drill bit standards. Suitable for use with any drill press or power drill equipped with a chuck sized for a straight-cylindrical shank of this diameter.

Installation Notes

Install this bit in a properly sized drill chuck and confirm the shank is fully seated and securely tightened before operation. De-energize and lock out any machine before bit changes. Use appropriate cutting fluid when drilling steel to extend tool life and maintain hole tolerance. Wear appropriate eye protection and follow applicable OSHA and shop safety protocols during all drilling operations.