Chicago-latrobe 44144 Wire Gauge Drill Bit Size 74 Hss

Product Description

The CHICAGO-LATROBE 44144 is a wire gauge jobber length drill bit sized at number 74 (0.0225 inches decimal) designed for general-purpose drilling in ferrous materials. Built from high speed steel with an oxide coating for added lubricity and surface protection, this bit features a 118-degree standard point angle and a two-flute spiral configuration for efficient chip evacuation. The straight-cylindrical shank measures 0.0225 inches in diameter and fits standard collets and drill chucks without modification. At 1 inch overall length with a quarter-inch flute length, it is well suited for close-tolerance small-diameter work where precision entry matters. Licensed tradespeople and machinists use this bit in production and field settings alike.

The 44144 is intended for drilling cast iron and steel and performs well across general-purpose metal fabrication, HVAC sheet metal, plumbing rough-in, and electrical panel work where small pilot holes or wire clearance holes are required. The web-thinned, tapered-web geometry reduces thrust force at entry, which is particularly useful in thin-gauge material. Series 150 is a standard jobber-length lineup, and this bit ships individually per package while requiring a minimum order of 12 units. It conforms to DIN 338 dimensional standards, ensuring consistent fit across compatible tooling.

Key Features

• Wire gauge size 74 — 0.0225 inches decimal diameter for precise small-hole drilling
• High speed steel construction with oxide coating for lubricity and corrosion resistance
• 118-degree standard point angle with web-thinned, tapered-web geometry to reduce thrust
• Two-flute regular spiral design for efficient chip removal in cast iron and steel
• Straight-cylindrical shank for compatibility with standard drill chucks and collets
• Conforms to DIN 338 dimensional standard for consistent interchangeability

Compatibility

Designed as a general-purpose replacement or stock bit for applications requiring a number 74 wire gauge drill in cast iron and steel. Primary workpiece materials listed are cast iron and steel.

Installation Notes

Installation and use of this bit should be performed by a machinist or qualified trade professional familiar with small-diameter drilling operations. Secure the workpiece firmly before drilling and use appropriate low-speed, high-feed settings to avoid bit deflection or breakage at this diameter. Cutting fluid or light oil is recommended for steel applications to extend tool life, even though coolant-through is not supported on this bit. Inspect the cutting edges before each use, as small-diameter HSS bits are susceptible to tip damage from improper storage or side loading.