Cleveland C70210 Cobalt Jobber Drill Bit Wire 77

Product Description

The CLEVELAND C70210 is a cobalt jobber-length drill bit in wire gauge size 77, designed for precision drilling in demanding trade and industrial applications. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit delivers extended tool life and heat resistance compared to standard HSS tooling. The 135-degree split point promotes accurate positioning and reduces the thrust required to start a hole, minimizing walking on smooth or curved surfaces. At 0.0180 inches in diameter with a 7/8-inch overall length, the C70210 is sized for fine-hole work where tight tolerances are required. It is sold individually and intended for use by machinists, maintenance technicians, and fabricators.

This drill bit is rated for primary use in aluminum and is well suited for light-metal drilling tasks in production and maintenance environments. The straight-cylindrical shank fits standard keyless and keyed drill chucks. The regular spiral flute design promotes chip evacuation during through-hole and blind-hole drilling operations. Web-thinned geometry and a tapered web configuration reduce cutting resistance and improve penetration on short-run and repetitive drilling jobs. Applications include sheet metal fabrication, mechanical assembly, and precision maintenance work where wire-gauge hole sizes are specified.

Key Features

• M42 cobalt high-speed steel construction for elevated heat and wear resistance
• Gold oxide coating extends cutting edge life and reduces friction
• 135-degree split point reduces walking and lowers required feed force
• Web-thinned, tapered web geometry improves penetration efficiency
• Two-flute regular spiral design promotes chip clearance in aluminum and light metals
• Meets NAS 907 Type J specification for heavy-duty drill bit grade

Compatibility

Designed as an OEM-style replacement or direct-use jobber-length drill bit for applications requiring wire gauge size 77 at 0.0180 inches diameter, compatible with any standard drill chuck accepting a straight-cylindrical shank of 0.0180 inches.

Installation Notes

This bit is installed by machinists and maintenance technicians using standard bench-top or hand-held drill equipment. Secure the straight-cylindrical shank firmly in the chuck before operating. Use appropriate cutting fluid or coolant when drilling ferrous or harder non-ferrous materials to preserve the cutting edge, noting that this bit does not support coolant-through delivery. Inspect the cutting edge before each use and replace if chipping or excessive wear is visible to maintain hole-size tolerances.