Chicago-latrobe 46683 Cobalt Jobber Drill Bit Wire 13

Product Description

The CHICAGO-LATROBE 46683 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, it handles elevated heat without losing edge hardness. The 135-degree split point reduces walking and lowers thrust on entry, making it well-suited for work in titanium, stainless steel, and other tough alloys. At 3.5 inches overall length with a 2-5/16-inch flute, this bit fits standard drill chucks and magnetic drill setups used daily in fabrication and maintenance work. It is a heavy-duty tool for professional tradespeople who drill into difficult materials regularly.

This bit is intended for metal fabrication, aerospace maintenance, mechanical contracting, and industrial service applications where conventional high-speed steel bits fail prematurely. The wire size 13 diameter of 0.185 inches is a common hole size for tapping operations and close-tolerance through-holes. The right-hand spiral flute with regular helix clears chips efficiently in both through-hole and blind-hole drilling. It meets DIN 338 and NAS 907 Type J standards, making it appropriate for applications that call out those specifications. Machinists, millwrights, and sheet metal workers are the primary installers.

Key Features

• M42 cobalt steel construction resists heat buildup when drilling titanium and stainless alloys
• 135-degree split point reduces thrust and prevents bit walking on entry
• Gold oxide coating provides lubricity and additional wear resistance
• Web-thinned, tapered web design reduces cutting resistance through the full flute depth
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets DIN 338 and NAS 907 Type J specifications for controlled applications

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for Series 550 heavy-duty cobalt drill applications requiring a wire size 13 (0.185 inch) diameter hole per DIN 338 and NAS 907 Type J standards.

Installation Notes

This bit is installed by machinists, millwrights, and metal fabricators using standard drill presses, hand drills, or magnetic base drills. Always secure the workpiece before drilling and use appropriate cutting fluid when drilling titanium or stainless steel to extend tool life. Inspect the split point for chipping before each use, especially after drilling hardened materials. Dispose of worn bits per shop safety protocols and replace before edge degradation causes oversize holes.