Cleveland C16728 Taper Length Drill Bit No. 5 Cobalt

Product Description

The CLEVELAND C16728 is a taper length cobalt drill bit designed for heavy-duty metal drilling in industrial and trade applications. Built to Series 2575 standards and conforming to DIN 338, this bit features a 135-degree split point that reduces walking and cutting pressure at startup. The M42 cobalt steel construction with an oxide gold coating resists heat buildup during high-speed drilling in tough materials. At 0.2055 inches in diameter (No. 5 wire size) with a 3.625-inch parabolic flute and a 6-inch overall length, it is sized for taper-length reach in applications where standard-length bits fall short. Machinists, maintenance technicians, and fabricators use this bit for production and repair drilling.

The C16728 is suited for drilling a wide range of materials including aluminum, brass, carbon steel, cast iron, nickel alloy, plastic, stainless steel, and tool steel. The parabolic flute geometry improves chip evacuation in deeper holes, reducing the need to peck-drill as frequently. The straight shank accepts standard drill chucks on bench drill presses, hand drills, and CNC machining centers. Right-hand cut direction is standard for conventional clockwise-rotating spindles. This bit is a practical choice for shops and field technicians who need reliable performance across mixed-material workflows.

Key Features

• M42 cobalt steel construction for heat resistance in hard and abrasive materials
• 135-degree split point reduces thrust force and eliminates center-punching on most metals
• Parabolic flute geometry accelerates chip removal in deeper cuts
• Oxide gold coating improves surface hardness and extends tool life
• Web-thinned and tapered web configuration reduces cutting resistance
• DIN 338 specification compliance ensures dimensional consistency

Compatibility

Compatible with materials including aluminum, brass, carbon steel, cast iron, nickel alloy, plastic, stainless steel, and tool steel. Fits any standard drill chuck accepting a straight shank at 0.2055 inches diameter.

Installation Notes

This bit is installed and operated by machinists, maintenance technicians, and metal fabricators using drill presses, hand drills, or CNC equipment. Always secure the workpiece firmly before drilling and use appropriate cutting fluid when drilling stainless steel, nickel alloy, or tool steel to manage heat. Inspect the cutting edge before use and do not run a dull or damaged bit at speed. Follow applicable shop safety and OSHA machine-guarding requirements when operating rotating cutting tools.