Chicago-latrobe 48826 Screw Machine Drill Bit Letter Z

Product Description

The CHICAGO-LATROBE 48826 is a screw machine length drill bit designed for high-volume, close-tolerance drilling in metalworking and fabrication environments. Built from high speed steel with a bright/uncoated finish, it features a standard 118-degree point angle and a two-flute regular spiral configuration. The straight cylindrical shank seats firmly in standard drill chucks and screw machine spindles. At 0.413 inches in diameter (Letter Z) with a diameter tolerance of +0.0000 to -0.0010 inches, this bit holds tight tolerances suited for precision hole work. Licensed machinists, tool and die tradespeople, and industrial maintenance technicians are the primary installers and users of this tool.

The 48826 fits Series 157 general purpose applications and is rated for drilling cast iron, non-ferrous metals, and steel. The screw machine length format offers a shorter overall body compared to jobber-length bits, improving rigidity and reducing deflection in production drilling setups, turret lathes, and screw machine operations. The 2-inch flute length provides adequate chip clearance for through-hole and blind-hole work across these materials. Web-thinned construction reduces thrust requirements, which is especially useful when working harder ferrous stock.

Key Features

• Letter Z diameter (0.413 inches) with tight tolerance of +0.0000 to -0.0010 inches
• 118-degree standard point angle for general purpose metal drilling
• High speed steel construction for durability across ferrous and non-ferrous materials
• Screw machine length body improves rigidity and reduces deflection vs. jobber-length bits
• Web-thinned, parallel web configuration reduces cutting thrust
• Right-hand cut, two-flute regular spiral for efficient chip evacuation

Compatibility

Designed as a general purpose screw machine length drill bit for use in standard drill chucks, turret lathes, and screw machine spindles accepting straight cylindrical shanks. Rated for primary workpiece materials including cast iron, non-ferrous metal, and steel.

Installation Notes

This tool is intended for use by machinists and industrial tradespeople operating drill presses, lathes, or screw machines. Secure the shank fully in the chuck before operation and verify chuck key removal prior to startup. Appropriate cutting fluid or coolant applied at the cutting zone extends tool life when drilling steel. Follow machine manufacturer speed and feed recommendations for the workpiece material and hole diameter.