Cleveland C16615 Cobalt Jobber Drill Bit Wire Size 4

Product Description

The CLEVELAND C16615 is a cobalt jobber length drill bit built for heavy-duty drilling applications in hard and abrasive materials. Ground from M42 cobalt high-speed steel and finished with a titanium nitride (TiN) coating, this bit delivers extended tool life in tough ferrous metals, stainless steel, and work-hardened alloys. The split point at 135 degrees reduces walking on entry and lowers feed pressure, while the parabolic flute geometry clears chips efficiently along the 2.5-inch flute length. Overall length is 3.75 inches with a straight-cylindrical shank diameter of 0.2090 inches. Right-hand cut configuration is standard. This bit is sold individually and is a common choice for machinists, fabricators, and maintenance technicians working with demanding base materials.

The C16615 is sized to wire gauge 4, with a decimal diameter of 0.2090 inches, placing it in the 0.2000 to 0.2500 inch size range. It is suited for use in drill presses, CNC machines, and hand-held power drills where precise hole diameter and clean entry are required. The tapered web with web thinning reduces axial load, making it practical for production drilling where operator fatigue and tool wear are concerns. Meets ASME B94.11M and DIN 338 standards.

Key Features

• M42 cobalt steel construction rated for heavy-duty use in hard and abrasive materials
• Titanium nitride (TiN) coating extends surface hardness and reduces friction at the cutting edge
• 135-degree split point reduces drill walking and lowers required feed force
• Parabolic flute design promotes efficient chip evacuation over the 2.5-inch flute length
• Tapered web with web thinning reduces axial load during drilling
• Meets ASME B94.11M and DIN 338 dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for standard 3-jaw chucks and collet systems accepting a 0.2090-inch straight-cylindrical shank, consistent with Series 2075T tooling in the CLEVELAND line.

Installation Notes

This bit is installed and operated by machinists, tool-and-die technicians, and maintenance professionals using drill presses, lathes, or hand-held power tools. Ensure the shank is fully seated and securely clamped in the chuck before operation. Use appropriate cutting fluid for the base material to preserve coating life and edge integrity. Inspect the cutting edges before each use and retire bits showing chipping or excessive wear to maintain hole tolerance.