Cleveland C16665 Jobber Drill Bit Size 51 Cobalt Tin

Product Description

The CLEVELAND C16665 is a jobber length drill bit in wire gauge size 51, measuring 0.0670 inches in diameter. Built from M42 cobalt high-speed steel with a titanium nitride (TiN) coating, this bit is engineered for heavy-duty drilling in hard and abrasive materials. The 135-degree split point reduces walking on entry and lowers thrust requirements, while the parabolic flute geometry promotes efficient chip evacuation. Overall length is 2 inches, with a 1-inch flute length and a straight-cylindrical shank of 0.0670 inches. Right-hand cut only. Installed by machinists, tool and die tradespeople, and maintenance mechanics in production and repair environments.

The C16665 is suited for drilling ferrous metals, stainless steel, cast iron, and other high-strength materials where standard HSS bits wear prematurely. Its compact 2-inch overall length makes it a practical choice for benchtop drill presses, CNC machining centers, and handheld operations requiring precise small-diameter holes. The Series 2075T designation places it in a recognized heavy-duty product family intended for industrial and maintenance applications where dimensional accuracy and tool life are priorities.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• Titanium nitride (TiN) coating reduces friction and improves wear resistance
• 135-degree split point minimizes walking and reduces entry thrust
• Parabolic flute profile with web thinning promotes fast, clean chip evacuation
• Straight-cylindrical shank at 0.0670 inches fits standard drill chucks without adapters
• Meets ASME B94.11M and DIN 338 standards; diameter tolerance -0.0005 to 0.0000 inches

Compatibility

Designed as an OEM-style replacement or direct-use jobber length drill bit for applications requiring a wire gauge size 51 (0.0670-inch diameter) hole in metalworking, maintenance, and light industrial settings.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance mechanics familiar with drill press or CNC tooling procedures. Secure the shank firmly in a properly sized chuck before operation and verify spindle speed is appropriate for the workpiece material and bit diameter. Do not exceed the rated cutting parameters for cobalt-grade tooling. Inspect the cutting edges and TiN coating before each use and replace the bit if chipping or excessive wear is observed.