Chicago-latrobe 46746 Cobalt Jobber Drill Bit Wire 76

Product Description

The CHICAGO-LATROBE 46746 is a cobalt jobber-length drill bit in wire gauge size 76, with a decimal diameter of 0.0200 inches and a 135-degree split-point angle. Built to Series 550 standards and conforming to DIN 338 and NAS 907 Type J specifications, this bit is manufactured from M42 cobalt high-speed steel and finished with a gold oxide coating to reduce friction and extend tool life in demanding materials. The straight-cylindrical shank and spiral flute geometry make it compatible with standard drill chucks. It is sized for precision small-diameter work and is classified as a heavy-duty, high-performance cutting tool.

This bit is designed for drilling titanium and similarly hard or abrasive metals where standard high-speed steel tooling fails prematurely. The web-thinned, tapered-web point reduces thrust and improves chip evacuation in tight geometries. Typical applications include aerospace component fabrication, precision machining, and any production environment requiring consistent dimensional accuracy in sub-1/8-inch hole diameters. It is sold individually but requires a minimum order quantity of 12 units per purchase. Machinists, tool-and-die professionals, and aerospace maintenance technicians are the primary users.

Key Features

• M42 cobalt steel construction for hardness and heat resistance in titanium and exotic alloys
• 135-degree point angle reduces walking and entry force on hard materials
• Gold oxide coating lowers friction and extends cutting life
• Web-thinned tapered web improves chip clearance and reduces thrust
• Conforms to DIN 338 and NAS 907 Type J dimensional standards
• Right-hand spiral flute with regular helix for consistent chip evacuation

Compatibility

Designed as a jobber-length replacement or production bit for applications requiring wire gauge size 76 (0.0200 inches) hole diameters, particularly in titanium and other high-strength workpiece materials per NAS 907 Type J specification.

Installation Notes

This bit should be installed in a drill press, CNC machine, or precision hand drill with a chuck capable of gripping a 0.0200-inch straight-cylindrical shank securely. Use appropriate cutting fluid or lubricant when drilling titanium to manage heat buildup. Inspect the cutting edges before each use; at this diameter, the bit is susceptible to breakage if run at incorrect speeds or feeds. Follow the machine manufacturer and tooling supplier recommended speeds and feeds for cobalt tooling in the target workpiece material.