Chicago-latrobe 44180 Jobber Drill Bit Letter J Hss

Product Description

The CHICAGO-LATROBE 44180 is a jobber-length drill bit sized to Letter J (0.2770 inches decimal equivalent), designed for general-purpose drilling in cast iron and steel. Built from high speed steel (HSS) with an oxide coating, it delivers reliable performance across common metalworking and maintenance applications. The bit features a standard 118-degree drill point angle, a two-flute regular spiral configuration, and a web-thinned, tapered web design that reduces thrust and improves chip evacuation. Overall length is 4.125 inches with a flute length of 2.875 inches. Licensed HVAC technicians, plumbers, pipefitters, and general maintenance tradespeople routinely rely on jobber-length bits like this for clearance holes, pilot holes, and tap-drill operations on ferrous materials.

This drill bit is suited for drilling cast iron and steel in residential and light commercial service environments. Typical applications include drilling hole patterns for equipment mounting, conduit runs, pipe hangers, and structural fasteners. The straight cylindrical shank fits standard drill chucks without modification. The Series 150 designation places this bit in the general-purpose category, appropriate for hand-held drills, drill presses, and light-duty milling setups where a high-tolerance ground bit is not required.

Key Features

• Letter J size — 0.2770 inches decimal equivalent, toleranced at -0.0010 to 0.0000 inches
• High speed steel construction with oxide finish for corrosion resistance and reduced friction
• 118-degree standard point angle with web-thinned, tapered web for reduced entry force
• Two-flute regular spiral geometry promotes efficient chip clearing in ferrous materials
• Straight cylindrical shank — 0.2770 inches diameter, 1.25 inches shank length — fits standard chucks
• Meets DIN 338 standard for jobber-length drill bits

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks accepting straight cylindrical shanks; primary workpiece materials are cast iron and steel.

Installation Notes

Installation of this bit is performed by any qualified tradesperson using a keyed or keyless drill chuck rated for the shank diameter. Secure the shank fully in the chuck before operation and confirm the bit runs true before drilling into the workpiece. Use appropriate cutting fluid or lubricant when drilling steel to extend bit life and maintain hole tolerance. Follow applicable shop safety and PPE requirements when operating rotary cutting tools.