Chicago-latrobe 44741 Jobber Drill Bit Wire 71 Hss 135

Product Description

The CHICAGO-LATROBE 44741 is a jobber length drill bit in wire gauge size 71, delivering a decimal diameter of 0.0260 inches through high speed steel construction with an oxide coating. Built to NAS 907 Type B standards, it is rated as a heavy-duty, high-performance tool suited for precision small-hole drilling in demanding materials. The 135-degree split point reduces walking on contact and requires less thrust than a 118-degree point. The two-flute spiral design with a tapered, web-thinned core clears chips efficiently. Licensed tradespeople, machinists, and maintenance technicians rely on this bit for tight-tolerance work where diameter consistency is critical.

This bit is designed for right-hand cutting in cast iron, stainless steel, and steel. Its straight-cylindrical shank fits standard drill chucks and collet holders without adapters. The 1-1/4 inch overall length and 3/8 inch flute length make it appropriate for shallow precision holes in close-clearance applications such as sheet metal, structural plate, and machined components. The oxide coating provides a surface treatment that reduces friction during cutting. At 0.06 pounds, the bit is light and easy to handle in benchtop drill press or hand-drill applications.

Key Features

• Wire gauge size 71 at 0.0260 inches decimal diameter for precision small-hole work
• 135-degree standard split point minimizes walking and reduces required thrust
• High speed steel construction with oxide coating for reduced friction
• Web-thinned, tapered web configuration improves cutting efficiency
• Straight-cylindrical shank at 0.0260 inches fits standard drill chucks directly
• Meets NAS 907 Type B specification for heavy-duty performance

Compatibility

Rated for use in cast iron, stainless steel, and steel workpieces. Fits any standard drill chuck or collet sized to accept a 0.0260 inch straight-cylindrical shank.

Installation Notes

Installation of this bit is performed by machinists or maintenance technicians using a drill press, CNC machine, or hand drill with a compatible chuck. Secure the shank fully in the chuck before operation and verify concentricity to avoid deflection at this small diameter. Always wear appropriate eye protection and use cutting fluid when drilling stainless steel or cast iron to extend bit life and manage heat buildup. Inspect the cutting edges before each use - small-diameter bits are susceptible to chipping if run at incorrect speeds or feeds.