Cleveland C16511 Cobalt Jobber Drill Bit Wire 9 135 Deg

Product Description

The CLEVELAND C16511 is a cobalt jobber-length drill bit designed for demanding metal-cutting applications in production and maintenance environments. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance needed when drilling hard or abrasive materials. The bit runs a 135-degree split point that reduces walking and allows cutting to start without a center punch in many setups. A gold oxide finish adds a layer of surface protection. At 3.625 inches overall length with a 2.4375-inch flute, this is a standard jobber-length format suitable for most drill press and hand-drill chucks. Diameter is 0.1960 inches (wire gauge number 9). Installation is handled by machinists, maintenance technicians, and fabricators.

This bit is rated for use in cast iron, non-ferrous metals, stainless steel, and general steel stock. The parabolic flute geometry promotes efficient chip evacuation, which is especially important when drilling deep holes in gummy or stringy materials like stainless steel. The two-flute, right-hand-cut configuration is standard for most rotary drilling operations. The straight-cylindrical shank at 0.1960 inches diameter fits standard drill chucks without adapters. This is a heavy-duty grade bit intended for repetitive or high-feed applications where standard HSS bits fail prematurely.

Key Features

• M42 cobalt HSS construction for extended tool life in hard and abrasive materials
• 135-degree split point reduces thrust force and minimizes bit walking on startup
• Parabolic flute geometry improves chip flow and reduces heat buildup in deep holes
• Gold oxide coating provides added surface protection and lubricity
• Web-thinned, tapered web design lowers cutting resistance
• Right-hand cut with straight-cylindrical shank for universal chuck compatibility

Compatibility

Designed as a jobber-length drill bit in wire gauge size 9 (0.1960 inches) suitable for use in standard drill presses, CNC machining centers, and hand-held drills with compatible chuck capacity. Rated for cast iron, non-ferrous metal, stainless steel, and steel workpieces. Conforms to ASME B94.11M and DIN 338 standards.

Installation Notes

This bit is installed and operated by machinists, fabricators, or maintenance technicians. Ensure the drill chuck is properly tightened before operation and that the workpiece is secured to prevent movement during cutting. Use appropriate cutting fluid or coolant when drilling stainless steel or hard alloys to extend tool life, noting this bit does not support coolant-through delivery. Inspect the cutting edge before each use and replace the bit if chipping or excessive wear is observed.