Cleveland C71085 Jobber Drill Bit Letter O 118 Hss

Product Description

The CLEVELAND C71085 is a jobber-length twist drill bit sized to Letter O (0.3160 inches decimal), designed for general-purpose drilling in metal, wood, and plastics. Built from high speed steel with an oxide coating, it runs cooler and resists corrosion during repeated use. The 118-degree standard point angle and web-thinned tip make starting and penetrating material straightforward without excessive thrust. At 4.5 inches overall length with a 3.1875-inch spiral flute, this bit fits standard drill chucks and magnetic-base setups used by machinists, pipefitters, ironworkers, and general maintenance trades.

The C71085 is suited for production and maintenance drilling in light industrial and commercial environments. Its straight-cylindrical shank seats securely in both hand drills and drill presses. The right-hand, two-flute spiral design provides efficient chip evacuation in through-hole and blind-hole applications. This bit is built to ASME B94.11M and DIN 338 standards, making it appropriate wherever those tolerances are specified. General-purpose grade rating makes it a practical stock item for shops and service vans alike.

Key Features

• Letter O size: 0.3160 inches decimal diameter with a diameter tolerance of -0.0010 to 0.0000 inches
• High speed steel construction with oxide coating for heat and corrosion resistance
• 118-degree standard point with web-thinned, tapered web for reduced entry thrust
• Two-flute regular spiral design promotes efficient chip clearing
• Straight-cylindrical shank (0.3160 inches) fits standard drill chucks without adapters
• Meets ASME B94.11M and DIN 338 standards for jobber-length drill bits

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard three-jaw drill chucks accepting a 0.3160-inch straight-cylindrical shank, suitable for use in hand drills, drill presses, and magnetic-base drills across light industrial and maintenance applications.

Installation Notes

Install and remove drill bits only after the drill or drill press is fully powered down and the chuck has stopped rotating. Secure the shank fully in the chuck and tighten all jaws evenly before drilling. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life and maintain dimensional accuracy. Wear appropriate eye protection and secure the workpiece to prevent movement during drilling.