Chicago-latrobe 44147 Jobber Drill Bit Wire 77 Hss

Product Description

The CHICAGO-LATROBE 44147 is a jobber-length drill bit sized at wire gauge 77, equivalent to 0.0180 inches in decimal. Built from high-speed steel with an oxide coating, this bit is designed for general-purpose drilling in cast iron and steel. The standard 118-degree split point and web-thinned tip promote accurate starts and reduce walking on entry. With a straight-cylindrical shank at 0.0180 inches in diameter and an overall length of 0.875 inches, this bit fits standard drill chucks and is well suited for precision work where small-diameter holes are required. It is commonly used by machinists, maintenance technicians, and fabricators working in metal fabrication or repair environments.

This bit is intended for drilling cast iron and steel in general-purpose applications. The 0.875-inch overall length and 0.1875-inch flute length make it appropriate for shallow-depth, small-diameter hole work. The regular spiral flute geometry promotes chip evacuation in metalworking operations. It conforms to DIN 338 standards, making it a recognized format across industrial and trade settings. Technicians and machinists in manufacturing, HVAC fabrication, and general metalwork will find this bit applicable for pilot holes, light-duty drilling, and precision layout tasks.

Key Features

• Wire gauge size 77, decimal equivalent 0.0180 inches for precision small-diameter drilling
• 118-degree standard drill point angle with web-thinned tip reduces entry force and improves accuracy
• High-speed steel construction with oxide coating for wear resistance in ferrous metals
• Right-hand cut with regular spiral flute geometry for efficient chip removal
• Straight-cylindrical shank at 0.0180 inches fits standard drill chucks without adapters
• Meets DIN 338 standards for jobber-length drill bits

Compatibility

Designed as a general-purpose jobber-length drill bit for use in cast iron and steel. Primary workpiece materials listed by the manufacturer are cast iron and steel. No coolant-through capability; intended for dry or externally lubricated drilling operations.

Installation Notes

This bit is installed and used by machinists, maintenance technicians, and metal fabricators using standard drill presses, hand drills, or CNC drilling equipment. Secure the straight-cylindrical shank firmly in the drill chuck before operation and verify concentricity to avoid bit deflection at small diameters. Do not exceed recommended feed rates for high-speed steel in hard ferrous materials, as small-diameter bits are susceptible to breakage under lateral load. Use cutting fluid or lubricant as appropriate for the workpiece material to extend tool life.