Cleveland C16810 Taper Length Drill Bit 4mm Cobalt

Product Description

The CLEVELAND C16810 is a taper length cobalt drill bit engineered for heavy-duty metal drilling applications. Built from M42 cobalt high-speed steel, it delivers superior heat and wear resistance compared to standard HSS tooling. The 135-degree split point reduces thrust, minimizes walking on entry, and eliminates the need for a center punch on most surfaces. The parabolic flute geometry accelerates chip evacuation and keeps the cutting zone clear during deep-hole drilling. At 0.1575 inches (4 mm) in diameter with an overall length of 5.748 inches and a flute length of 3.386 inches, this bit covers taper-length reach requirements that standard jobber bits cannot meet. It is sold individually.

The C16810 is suited for production and maintenance drilling in ferrous and non-ferrous materials. Its rated material application list includes aluminum, brass, carbon steel, cast iron, nickel alloy, plastic, stainless steel, and tool steel. The straight shank and 4 mm shank diameter make it compatible with standard drill chucks and collet holders. Web-thinned construction and a tapered web configuration reduce cutting resistance in tough alloys. This bit is a practical choice for machinists, industrial maintenance techs, pipefitters, and fabricators working with tight-tolerance hole requirements.

Key Features

• M42 cobalt construction for extended tool life in hard and abrasive materials
• 135-degree split point reduces entry thrust and eliminates center-punch requirement on most surfaces
• Parabolic flute design accelerates chip evacuation during deep-hole drilling
• Web-thinned, tapered web configuration reduces cutting resistance
• Right-hand cut with straight shank for standard chuck and collet compatibility
• Meets ASME B94.11M, DIN 340, and DIN 338 standards

Compatibility

Designed for use in standard drill chucks and collet holders accepting a 4 mm straight shank. Rated for drilling aluminum, brass, carbon steel, cast iron, nickel alloy, plastic, stainless steel, and tool steel per manufacturer material application data.

Installation Notes

Installation and use of this bit should follow standard machine-shop or hand-drill safety practices. Secure the workpiece before drilling and confirm chuck grip is firm before starting the spindle. Use appropriate cutting fluid when drilling stainless steel, tool steel, or nickel alloy to manage heat buildup. Inspect the cutting edge for wear before each use and replace when the split point shows signs of chisel wear or the flutes show built-up edge.