Cleveland C16781 Taper Length Drill Bit 9/64 in Cobalt

Product Description

The CLEVELAND C16781 is a taper length drill bit built for heavy-duty drilling applications across a wide range of materials. Constructed from M42 cobalt high-speed steel, this bit delivers superior heat and wear resistance compared to standard HSS tooling. It measures 9/64 inch (0.1406 inch) in diameter with a 3-inch flute length and a 5-3/8-inch overall length. The 135-degree split point starts on contact without a center punch, reducing walking and improving hole entry accuracy. The parabolic flute geometry evacuates chips efficiently, making it well-suited for deeper holes and gummy or abrasive materials. Licensed machinists, tool and die professionals, and maintenance technicians rely on this bit for demanding production and repair work.

The C16781 is designed for drilling aluminum, brass, carbon steel, cast iron, nickel alloy, plastic, stainless steel, and tool steel. Its taper length profile provides additional reach compared to jobber-length bits, making it useful in situations where standard-length tooling cannot access the bore location. The straight shank seats in standard drill chucks without requiring specialized toolholders. This bit is appropriate for use in both handheld and machine-mounted drill applications where extended reach and chip clearance are priorities.

Key Features

• M42 cobalt construction for elevated heat resistance and extended tool life in hard or abrasive materials
• 135-degree split point for self-centering entry and reduced thrust force
• Parabolic flute geometry promotes aggressive chip evacuation in deep-hole drilling
• Web-thinned and web-tapered configuration reduces cutting resistance at the tip
• Taper length body (5-3/8 inches OAL) provides extended reach over jobber-length equivalents
• Conforms to ASME B94.11M and DIN 340 standards for dimensional consistency

Compatibility

Designed as an OEM-style replacement or direct upgrade for taper length drill bits in the 9/64-inch diameter class. Compatible with any standard drill chuck accepting a 0.1406-inch straight shank. Suitable for use across the material applications listed in the technical specifications.

Installation Notes

A licensed machinist or qualified maintenance technician should install and operate this bit following applicable shop safety procedures. Secure the straight shank fully in the drill chuck and verify runout before beginning the cut. Power down and de-energize all equipment before changing tooling. Always use appropriate cutting fluid or coolant for the workpiece material to maximize bit life and surface finish quality.