Chicago-latrobe 44131 Wire Size 61 Hss Jobber Drill Bit

Product Description

The CHICAGO-LATROBE 44131 is a jobber-length drill bit in wire gauge size 61, measuring 0.0390 inches in diameter. Built from high-speed steel with an oxide finish, this bit is engineered for general-purpose drilling in cast iron and steel. It features a standard 118-degree split point, a regular spiral flute, and a straight-cylindrical shank for use in standard chucks. The web-thinned, tapered web configuration reduces thrust and improves chip evacuation. Overall length is 1-5/8 inches, with a flute length of 11/16 inches. Licensed HVAC techs, machinists, and trade professionals reaching for small-diameter precision work will find this bit ready for production-level use.

Wire gauge size 61 places this bit at the smaller end of the fractional drill spectrum, making it well-suited for pilot holes, tapping operations, and precision work in ferrous metals including cast iron and steel. The oxide coating reduces friction and helps resist corrosion during storage and use. Its jobber-length geometry offers a balance of reach and rigidity for bench drill presses, hand drills, and drill-press setups in both shop and field environments. This bit ships individually but carries a minimum order quantity of 12 units, making it practical for shop stocking.

Key Features

• Wire gauge size 61 at 0.0390 inches decimal diameter for small-diameter precision work
• High-speed steel construction handles cast iron and steel without rapid edge wear
• 118-degree standard point angle suits general-purpose drilling in ferrous materials
• Oxide coating reduces friction and provides basic corrosion resistance
• Web-thinned tapered web lowers thrust requirements and improves chip clearing
• Right-hand cut, regular spiral flute with straight-cylindrical shank fits standard chucks

Compatibility

Designed as a general-purpose OEM-style replacement or stocking bit compatible with any standard straight-shank drill chuck accepting a 0.0390-inch shank diameter. Conforms to DIN 338 standards.

Installation Notes

A licensed machinist or trade professional should secure the workpiece firmly before drilling to prevent walking on entry when using small-diameter bits. Use appropriate cutting fluid on ferrous metals to extend bit life and maintain dimensional accuracy. Always match spindle speed to the material and bit diameter per standard machining reference charts. Inspect the cutting edges before each use; bits at this diameter are susceptible to breakage if deflected under load.