Cleveland C16530 Cobalt Jobber Drill Bit Size 28

Product Description

The CLEVELAND C16530 is a cobalt jobber length drill bit designed for demanding metal drilling applications in industrial and trade settings. Built from M42 cobalt high-speed steel, this bit carries a gold oxide coating that helps resist heat and wear during extended use. It features a 135-degree split point for fast penetration and reduced walking on entry, a parabolic flute design for efficient chip evacuation, and a web-thinned, tapered web configuration. The overall length is 2-7/8 inches with a 1-3/4 inch flute length, and the straight-cylindrical shank measures 0.1405 inches in diameter, matching the wire gauge 28 drill diameter. Machinists, pipefitters, and fabricators working in production or field environments will find this bit suited for heavy-duty drilling cycles.

The C16530 is rated for right-hand cutting and is intended for use on cast iron, non-ferrous metals, stainless steel, and carbon steel. It is well suited to applications where heat generation is high and tool life is critical, such as drilling through stainless steel plate, structural steel, or cast iron components. The parabolic flute geometry moves chips out of the hole quickly, reducing re-cutting and heat buildup in deep-hole scenarios. This bit conforms to ASME B94.11M and DIN 338 standards, making it appropriate for use where dimensional compliance is required.

Key Features

• M42 cobalt high-speed steel construction for heavy-duty, heat-resistant performance
• 135-degree split point reduces thrust and eliminates the need for a center punch on most metals
• Parabolic flute design promotes fast, efficient chip evacuation in deep holes
• Gold oxide coating adds surface hardness and heat resistance
• Web-thinned, tapered web reduces cutting resistance and improves penetration
• Conforms to ASME B94.11M and DIN 338 dimensional standards

Compatibility

Designed for use in standard drill presses, CNC machining centers, and hand-held electric drills with a straight-shank chuck. Rated for cast iron, non-ferrous metals, stainless steel, and steel workpieces per the Series 2075 specification.

Installation Notes

This bit is installed by a machinist or qualified tradesperson into a properly sized chuck rated for straight-shank tooling. Secure the shank fully in the chuck before operation and verify chuck key removal before starting the spindle. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting that this bit does not support through-spindle coolant delivery. Follow shop safety protocols and applicable ANSI machine guarding requirements when operating drilling equipment.