Cleveland C16540 Jobber Drill Bit Size 38 Cobalt

Product Description

The CLEVELAND C16540 is a jobber-length twist drill bit designed for high-demand metal drilling applications. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit delivers superior heat and wear resistance compared to standard HSS tooling. It carries a wire gauge size of 38, equivalent to 0.1015 inch decimal diameter, and features a 135-degree split point for accurate self-centering starts with minimal walking. A parabolic flute geometry accelerates chip evacuation and reduces heat buildup during deep-hole operations. With an overall length of 2.5 inches and a straight-cylindrical shank, it fits standard drill chucks without modification. Licensed HVAC technicians, machinists, and metalworking trades reach for this bit when working through tough ferrous and non-ferrous stock.

The C16540 is suited for drilling cast iron, stainless steel, carbon steel, and non-ferrous metals in both production and maintenance environments. The parabolic flute design and web-thinned tapered web reduce axial thrust, which is particularly useful when drilling stainless steel or other work-hardening alloys where heat management is critical. It is appropriate for use in drill presses, CNC machining centers, and handheld power drills equipped with a chuck capable of holding a 0.1015-inch shank. The gold oxide finish provides additional lubricity and corrosion resistance during storage and use.

Key Features

• M42 cobalt HSS construction for extended tool life in hard and abrasive materials
• 135-degree split point for self-centering entry and reduced thrust requirement
• Parabolic flute profile promotes fast chip evacuation and minimizes heat buildup
• Gold oxide coating adds lubricity and surface protection
• Web-thinned tapered web lowers cutting resistance in tough alloys
• Meets ASME B94.11M and DIN 338 standards for consistent dimensional accuracy

Compatibility

Designed as a heavy-duty OEM-style jobber drill for use with any standard drill chuck or collet sized to accept a 0.1015-inch straight-cylindrical shank. Primary workpiece materials listed by the manufacturer include cast iron, non-ferrous metal, stainless steel, and steel.

Installation Notes

Install into a properly rated drill chuck or collet and verify the shank is fully seated before operation. Machinists and metalworking professionals should apply cutting fluid when drilling stainless steel or other work-hardening alloys to manage heat and extend tool life. Ensure the workpiece is securely fixtured or clamped before starting the cut. Follow applicable shop safety practices and machine manufacturer guidelines for spindle speed and feed rate selection.