Chicago-latrobe 46715 Cobalt Jobber Drill Bit No. 45

Product Description

The CHICAGO-LATROBE 46715 is a cobalt jobber-length drill bit designed for high-performance drilling in hard and abrasive materials. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit delivers heat and wear resistance well beyond standard HSS tooling. It features a 135-degree split point for fast penetration and reduced walking on entry, a two-flute regular spiral configuration, and a web-thinned, tapered web construction. Overall length is 2.125 inches with a 1.125-inch flute length. The straight cylindrical shank measures 0.0820 inches in diameter, matching the wire gauge No. 45 drill size of 0.0820 inches decimal. Licensed trades and metalworking professionals rely on this bit for production and maintenance drilling alike.

The 46715 is rated for primary use on titanium and similarly tough workpiece materials where standard carbon or bright-finish HSS bits fall short. The Series 550 designation places it in Chicago-Latrobe's heavy-duty line, built to NAS 907 Type J and DIN 338 standards. Typical applications include aerospace maintenance, precision machining, and fabrication work where tight diameter tolerance of -0.0005 to 0.0000 inches is required. It is sold individually per package with a minimum order quantity of 12 units, making it well suited for shop stocking in wire-gauge sizes.

Key Features

• M42 cobalt HSS construction for superior heat resistance in hard-metal drilling
• Gold oxide coating reduces friction and extends tool life
• 135-degree split point starts on contact, reducing thrust and bit walking
• Web-thinned, tapered web lowers cutting resistance through the full flute length
• Meets NAS 907 Type J and DIN 338 standards for heavy-duty industrial use
• Diameter tolerance held to -0.0005 to 0.0000 inches for precision fitment

Compatibility

Designed as an OEM-style replacement or stock drill bit for use in standard drill chucks and CNC spindles accepting a straight cylindrical shank at 0.0820 inches diameter, suitable for wire gauge No. 45 hole requirements per NAS 907 Type J specification.

Installation Notes

Install in a compatible drill chuck or CNC holder rated for the 0.0820-inch straight shank diameter. Ensure the workpiece is securely clamped before beginning the cut. Use appropriate cutting fluid or coolant when drilling titanium or other hard alloys to preserve coating integrity and bit life. Inspect the split point for chipping or wear before each use and replace if the cutting edges are compromised.