Cleveland C70010 Cobalt Drill Bit 11/64 Inch 135 Deg

Product Description

The CLEVELAND C70010 is a cobalt jobber-length drill bit designed for demanding metal drilling applications in industrial and trade environments. Built from M42 cobalt high-speed steel, this bit carries a gold oxide coating that improves heat resistance and extends tool life during high-speed drilling. The 135-degree split point reduces walking on entry, allowing accurate starting without a center punch on most surfaces. At 3-1/4 inches overall length with a 2-1/8 inch flute length, the C70010 fits standard drill chucks and is a go-to choice for machinists, pipefitters, and maintenance technicians working in production or field settings.

The C70010 is engineered to a NAS 907 Type J specification and is rated for drilling aluminum as its primary workpiece material, though the M42 cobalt construction handles a broad range of metals encountered in HVAC, plumbing, and general fabrication work. The straight-cylindrical shank at 11/64 inches diameter seats securely in keyless or keyed chucks. Regular spiral flutes evacuate chips efficiently during through-hole drilling. This bit is sold individually and suits applications where a single precision bit is needed for a specific hole size in a production or repair workflow.

Key Features

• M42 cobalt high-speed steel construction for heavy-duty drilling performance
• 135-degree split point reduces thrust and eliminates walking on entry
• Gold oxide coating improves lubricity and heat dissipation
• Web-thinned, tapered web design reduces cutting resistance
• Right-hand cut with regular spiral flutes for efficient chip evacuation
• Meets NAS 907 Type J specification for consistent dimensional tolerances

Compatibility

Designed as a jobber-length replacement or production drill bit for use in standard drill chucks accepting an 11/64 inch straight-cylindrical shank, compatible with hand drills, drill presses, and CNC equipment used in metal fabrication and maintenance trades.

Installation Notes

Installation of this drill bit is performed by a machinist or qualified tradesperson using a keyed or keyless chuck rated for the shank diameter. Secure the shank fully in the chuck before operation and confirm the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life, noting that this bit is not coolant-through. Inspect the cutting edges for wear or chipping before each use and replace if tip geometry is compromised.