Chicago-latrobe 48519 Screw Machine Drill Bit 19/64 in Hss

Product Description

The CHICAGO-LATROBE 48519 is a screw machine length drill bit designed for general-purpose drilling in metal fabrication and machining applications. Built from high speed steel with a bright, uncoated finish, this bit measures 19/64 inch (0.2969 inches) in diameter and carries a standard 118-degree split point with web thinning for improved center penetration. At 2-3/4 inches overall length with a 1-9/16 inch flute, the stub-length body provides added rigidity over jobber-length bits, reducing deflection in drill press and screw machine setups. Two spiral flutes with a regular helix evacuate chips efficiently during through-hole and blind-hole operations.

This bit is suited for drilling cast iron, non-ferrous metals, and steel in production and maintenance environments. The screw machine length profile makes it a standard choice for turret lathes, CNC machining centers, and bench drill presses where a shorter, stiffer tool is preferred over a standard-length bit. Machinists, tool-and-die technicians, and maintenance mechanics commonly stock this bit for repetitive drilling tasks requiring consistent hole tolerance. The diameter tolerance of +0.0000 to -0.0010 inches supports applications where hole quality and dimensional control matter. Meets ISO standards.

Key Features

• 19/64 inch (0.2969 inches) diameter with a tight tolerance of +0.0000 to -0.0010 inches for consistent hole sizing
• High speed steel construction provides heat resistance for drilling steel, cast iron, and non-ferrous metals
• 118-degree standard point angle with web thinning reduces entry force and improves centering
• Screw machine (stub) length body at 2-3/4 inches overall increases rigidity and reduces deflection
• Right-hand spiral flute with regular helix promotes efficient chip evacuation
• Bright, uncoated finish suitable for use with or without cutting fluid

Compatibility

Designed as a general-purpose replacement or stock drill bit for screw machine, turret lathe, CNC drilling, and drill press operations requiring a 19/64 inch diameter hole in cast iron, non-ferrous metal, or steel workpieces. Part of the CHICAGO-LATROBE Series 157 line.

Installation Notes

Install in a compatible drill chuck or collet rated for straight-cylindrical shank tooling, ensuring the shank is fully seated and the chuck is tightened securely before operation. Machinists and tool technicians should verify spindle speed and feed rate are appropriate for the workpiece material and bit diameter before drilling. Use a center punch or pilot hole to prevent walking on hard or smooth surfaces. Inspect the cutting edges for wear or chipping before each use and replace when dimensional tolerance can no longer be maintained.