Chicago-latrobe 48748 Screw Machine Drill Bit Wire 48

Product Description

The CHICAGO-LATROBE 48748 is a screw machine length drill bit designed for high-speed steel cutting in demanding shop and field applications. Built to Series 157 specifications, it features a standard 118-degree point angle, a bright/uncoated finish, and a straight-cylindrical shank. The shortened screw machine length body increases rigidity compared to jobber-length bits, reducing deflection during close-tolerance drilling. At 0.076 inches in diameter (Wire Size 48), this bit is suited for small-diameter pilot holes, through-holes, and precision work in metalworking applications. The parallel web configuration and web-thinned point reduce cutting resistance and improve chip evacuation. Two spiral flutes in a regular helix provide efficient material removal.

This drill bit is rated for use in cast iron, non-ferrous metals, and steel. The screw machine length format is a common choice in production environments, machining centers, drill presses, and handheld applications requiring a stiffer, more controlled cut. Its general-purpose performance rating makes it a practical option for maintenance, fabrication, and toolroom use where small-diameter precision drilling is required. The right-hand cutting direction is standard for conventional rotating spindles.

Key Features

• Wire Size 48 (0.0760 inches) with a tight diameter tolerance of +0.0000 to -0.0005 inches
• 118-degree standard point angle with web-thinned tip for reduced entry force
• High speed steel construction for durability across cast iron, steel, and non-ferrous metals
• Screw machine length body increases rigidity and minimizes deflection in tight setups
• Bright/uncoated finish suitable for general-purpose drilling without specialized coatings
• ISO standards compliance for dimensional consistency

Compatibility

Designed as an OEM-style general-purpose screw machine drill bit suitable for use in standard drill chucks, drill presses, CNC machining centers, and handheld power tools accepting straight-cylindrical shanks.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with small-diameter drill bit handling. Secure the shank fully in a compatible chuck before operation and verify spindle runout is within acceptable limits to avoid bit breakage at this diameter. Always wear appropriate eye protection and follow applicable shop safety standards when drilling metal. Do not apply excessive feed pressure on small-diameter bits, as deflection or breakage risk increases significantly.