Chicago-latrobe 44725 Wire Size 55 Hss Jobber Drill Bit

Product Description

The CHICAGO-LATROBE 44725 is a jobber length drill bit in wire gauge size 55, equivalent to 0.0520 inches in diameter. Built from high-speed steel with an oxide finish coating, this bit is engineered for heavy-duty production drilling in demanding materials. The 135-degree split point reduces walking at entry and minimizes the need for a center punch. A web-thinned, tapered web construction lowers thrust requirements and improves chip evacuation. At 1-7/8 inches overall length with a 7/8-inch flute length, this bit fits standard drill chucks and is suited for precision small-diameter work in metal fabrication, maintenance, and toolroom environments.

This drill bit is designed for use in cast iron, stainless steel, and carbon steel applications where consistent hole quality and tool life are required. The Series 150ASP designation indicates a high-performance ground geometry intended for professional trade use. It is appropriate for machine tool setups as well as hand-held drilling operations where a straight-cylindrical shank and standard jobber length are called for. Licensed trades including machinists, tool and die makers, pipefitters, and HVAC technicians performing sheet metal or equipment drilling work will find this bit suited to small precision holes in ferrous materials.

Key Features

• Wire gauge size 55 (0.0520 inches) for small-diameter precision drilling
• 135-degree split point reduces bit walking and lowers entry thrust
• Web-thinned tapered web improves chip flow and reduces heat buildup
• High-speed steel construction with oxide coating for wear resistance
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Meets NAS 907 Type B specification for heavy-duty drill bit standards

Compatibility

Designed for use in cast iron, stainless steel, and steel workpieces. Fits any standard drill chuck accepting a 0.0520-inch straight-cylindrical shank. Compatible with bench drill presses, CNC drilling equipment, and hand-held drills configured for small wire-gauge bits.

Installation Notes

This bit is installed and removed by a licensed machinist, HVAC technician, or qualified tradesperson using a standard keyed or keyless drill chuck. Secure the straight shank fully into the chuck before operation to prevent slipping and bit breakage. At small wire-gauge diameters, reduced feed pressure is critical to avoid bit deflection or snapping. Ensure the workpiece is firmly clamped or fixtured before drilling.