Cleveland C16593 Cobalt Jobber Drill Bit 5.5 Mm

Product Description

The CLEVELAND C16593 is a cobalt jobber-length drill bit designed for demanding metal-drilling applications. Built from M42 cobalt high-speed steel with a gold oxide coating, it resists heat and wear when cutting through hard or abrasive materials. The bit measures 5.5 mm (0.2165 inches) in diameter with an overall length of 3.661 inches and a 135-degree split point that self-centers on contact, reducing the need for a center punch. Machinists, pipefitters, ironworkers, and maintenance technicians use this bit in hand drills, drill presses, and CNC equipment where standard HSS tooling falls short.

This drill bit is built for production and maintenance drilling in cast iron, stainless steel, carbon steel, and non-ferrous metals. The parabolic flute geometry clears chips aggressively, making it well suited for deep-hole drilling where chip packing is a concern. The straight-cylindrical shank seats securely in standard three-jaw chucks. It conforms to ASME B94.11M and DIN 338 standards, making it a direct fit wherever those specifications are called out in shop or field environments.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• Gold oxide coating reduces friction and heat buildup during cutting
• 135-degree split point self-centers and reduces feed pressure
• Parabolic flute design promotes fast chip evacuation in deep holes
• Web-thinned, tapered web configuration for improved cutting efficiency
• Meets ASME B94.11M and DIN 338 standards

Compatibility

Designed for use in standard three-jaw drill chucks accepting a 0.2165-inch straight-cylindrical shank. Suitable for drilling cast iron, stainless steel, carbon steel, and non-ferrous metals. Conforms to DIN 338 and ASME B94.11M specifications.

Installation Notes

Install in a properly sized drill chuck and tighten securely before operation. Ensure the workpiece is clamped or fixtured to prevent rotation during drilling. Use cutting fluid or coolant appropriate for the workpiece material to extend bit life, noting this bit does not support coolant-through delivery. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.