Cleveland C16789 Taper Length Drill Bit 17/64 in Cobalt

Product Description

The CLEVELAND C16789 is a taper length drill bit built for heavy-duty metal cutting in demanding trade and industrial applications. Manufactured from M42 cobalt high-speed steel, this bit handles elevated heat and hard materials that would wear standard HSS tooling prematurely. The 17/64 inch (0.2656 inch decimal) diameter bit features a 135-degree split point that self-centers on contact, reducing the need for a center punch on most surfaces. Overall length is 6.25 inches with a 3.875-inch parabolic flute that evacuates chips aggressively and reduces heat buildup during deep-hole drilling. Machined to ASME B94.11M and DIN 340 standards, this bit meets recognized dimensional and performance benchmarks for professional tooling.

The C16789 is rated for drilling aluminum, brass, carbon steel, cast iron, nickel alloy, plastic, stainless steel, and tool steel. The taper length body provides additional reach compared to jobber-length bits, making it well suited for structural steel fabrication, HVAC equipment assembly, mechanical contractors, and industrial maintenance work where access depth matters. The straight shank with a 0.2656-inch diameter fits standard 3-jaw drill chucks without adapters. Right-hand cut geometry is compatible with conventional drilling equipment used across most trades.

Key Features

• M42 cobalt steel construction for heat resistance and extended tool life in hard and abrasive materials
• 135-degree split point self-centers and reduces thrust force, minimizing walking on metal surfaces
• Parabolic flute profile promotes fast chip evacuation and reduces heat buildup in deep holes
• Web-thinned, tapered web design lowers cutting resistance and improves penetration rate
• Taper length body (6.25 inches OAL) provides extra reach beyond standard jobber-length bits
• Meets ASME B94.11M and DIN 340 dimensional standards; diameter tolerance held to +0.0000 to -0.0010 inches

Compatibility

Designed for use in standard straight-shank drill chucks; compatible with drilling operations in aluminum, brass, carbon steel, cast iron, nickel alloy, plastic, stainless steel, and tool steel as specified by the manufacturer.

Installation Notes

Installation and use should be performed by qualified machinists, millwrights, or trade professionals familiar with rotary cutting tools and drill press or handheld drilling equipment. Secure the workpiece firmly before drilling and ensure the chuck is fully tightened on the straight shank before operation. Apply appropriate cutting fluid for the material being drilled, particularly when working stainless steel or nickel alloy, to extend bit life and maintain dimensional accuracy. Inspect the cutting edges for wear or chipping before each use and replace the bit if the split point or flute edges show damage.