Cleveland C16691 Cobalt Drill Bit 7/16 Inch 135 Deg

Product Description

The CLEVELAND C16691 is a cobalt jobber-length drill bit designed for heavy-duty metal drilling in demanding shop and field applications. Built from M42 cobalt high-speed steel and finished with a Titanium Nitride (TiN) coating, this bit delivers extended tool life when cutting through stainless steel, cast iron, hard alloys, and other abrasive materials. The 135-degree split point reduces thrust and starts on contact without center-punching. Overall length is 5.5 inches with a 4-1/16-inch flute length, making it compatible with standard jobber-length drill setups on both benchtop and handheld equipment.

This bit is suited for metalworking trades including HVAC fabrication, plumbing rough-in through metal framing, electrical conduit work, and general industrial machining. The straight cylindrical shank at 7/16 inch diameter fits standard three-jaw chucks on drill presses, magnetic drills, and hand drills without adapters. Right-hand cut with a parabolic flute geometry promotes fast chip evacuation in deep-hole drilling, reducing heat buildup and bit deflection in production or repetitive drilling tasks.

Key Features

• M42 cobalt steel construction for heavy-duty performance in hard and abrasive materials
• TiN coating extends wear resistance and reduces friction at the cutting edge
• 135-degree split point starts on contact, no center punch required
• Parabolic flute geometry accelerates chip evacuation in deep holes
• Web-thinned tapered web reduces cutting resistance and heat generation
• Straight cylindrical shank fits standard three-jaw chucks without adapters

Compatibility

Designed as an OEM-style jobber-length drill bit in the CLEVELAND 2075T series, conforming to ASME B94.11M and DIN 338 standards for straight-shank twist drills in the 0.4000 to 0.5000 inch diameter range.

Installation Notes

A licensed machinist or qualified trade professional should secure the shank firmly in a properly sized chuck before operation. Power down and lock out the drill or press before changing bits. Operate at appropriate surface footage for the workpiece material to avoid overheating the cutting edge. Do not use cutting fluid systems that are incompatible with TiN coatings; consult the coating manufacturer guidelines for coolant compatibility.