Cleveland C16582 Cobalt Jobber Drill Bit 31/64 in

Product Description

The CLEVELAND C16582 is a cobalt jobber length drill bit designed for heavy-duty metal drilling in professional trade and industrial applications. Ground from M42 cobalt high-speed steel, this bit runs at a 135-degree split point angle with a parabolic flute geometry for fast chip evacuation and reduced thrust. The gold oxide coating provides added surface hardness and lubricity. At 31/64 inch (0.4844 inch) in diameter with a 5-7/8 inch overall length, it is sized for demanding work where standard high-speed steel bits wear prematurely. Machinists, maintenance mechanics, and fabricators reach for this bit when drilling through tough materials in production or field service environments.

This bit is built for drilling cast iron, stainless steel, carbon steel, and non-ferrous metals. The parabolic flute profile clears chips efficiently in deep-hole drilling without packing the flutes. The straight-cylindrical shank seats securely in standard three-jaw chucks and most drill press or hand-drill setups. It is a practical choice wherever high-speed steel bits fail prematurely due to heat buildup or abrasive workpiece materials.

Key Features

• M42 cobalt high-speed steel construction for extended tool life in hard and abrasive metals
• 135-degree split point reduces walking and lowers required thrust at the start of the cut
• Parabolic flute design promotes fast, continuous chip evacuation in deep holes
• Gold oxide finish adds surface hardness and reduces friction during cutting
• Web-thinned, tapered web configuration for improved cutting efficiency
• Meets ASME B94.11M and DIN 338 standards for consistent dimensional accuracy

Compatibility

Designed for use in standard three-jaw chucks accepting a 31/64 inch straight-cylindrical shank. Compatible with drill presses, CNC drilling machines, and hand drills configured for this shank diameter. Primary workpiece materials include cast iron, stainless steel, carbon steel, and non-ferrous metals.

Installation Notes

This bit is installed by a machinist, maintenance mechanic, or fabricator using a standard three-jaw chuck. Secure the shank fully and verify chuck tightness before operation. Use appropriate cutting fluid or coolant on stainless steel and cast iron to manage heat, even though this bit does not support through-coolant. Inspect the cutting edges for wear or chipping before each use and replace when the split point geometry is no longer intact.