Chicago-latrobe 46499 Cobalt Jobber Drill Bit 13mm

Product Description

The CHICAGO-LATROBE 46499 is a cobalt jobber-length drill bit designed for high-performance drilling in steel, stainless steel, and other hard ferrous materials. Built to Series 550 standards, it features a 135-degree split point that reduces walking on entry and lowers the thrust required to start the cut. The gold straw coating signals the cobalt composition and provides a degree of lubricity and heat resistance. At 13.00 mm (0.5118 inches) in diameter with an overall length of 151.00 mm (5.945 inches), it fits the standard jobber length profile used across industrial and trade drilling applications. The two-flute regular spiral geometry clears chips efficiently and maintains consistent feed rates through tough workpiece materials.

This drill bit is suited for production drilling, maintenance, and fabrication work in metal-working environments. It excels in applications where work-hardening alloys like stainless steel demand a more durable bit than standard high-speed steel can provide. Typical users include machinists, pipefitters, ironworkers, and maintenance technicians drilling through structural steel, pipe, plate, and fittings. The straight cylindrical shank fits standard 3-jaw drill chucks on corded drills, drill presses, and CNC equipment. Web thinning reduces cutting resistance at the center of the bit, which is especially beneficial when drilling without pilot holes in heavier stock.

Key Features

• Cobalt construction with straw coating for improved heat resistance and extended tool life in hard metals
• 135-degree split point reduces drill walk and lowers entry thrust on steel and stainless steel
• Web-thinned tapered web reduces cutting resistance at the chisel edge
• Regular spiral flute geometry promotes efficient chip evacuation in ferrous materials
• Right-hand cutting direction, compatible with standard drill chucks and machines
• Meets DIN 338 and NAS 907 Type J standards for dimensional and performance consistency

Compatibility

Designed as an OEM-style replacement and direct-fit jobber drill for applications requiring a 13.00 mm straight-shank cobalt drill bit. Compatible with any standard drill press, handheld corded drill, or CNC machine accepting a straight cylindrical shank of 13 mm (0.2344 inches nominal decimal). Primary workpiece materials are steel and stainless steel per manufacturer specification.

Installation Notes

Install in a properly sized 3-jaw chuck or collet and confirm the shank is fully seated and tightened before operation. Power down or disconnect the drill press or machine before changing bits. Use appropriate cutting fluid or coolant when drilling stainless steel or hardened alloys to manage heat buildup, as this bit does not support through-coolant delivery. Follow applicable OSHA and shop safety standards for rotating cutting tools, including eye protection and workpiece clamping.