Cleveland C70029 Cobalt Drill Bit 15/32 in 135 Deg

Product Description

The CLEVELAND C70029 is a cobalt jobber length drill bit designed for heavy-duty metal drilling applications. Built to M42 cobalt steel material grade, it delivers superior heat resistance and cutting edge retention compared to standard high-speed steel bits. The 135-degree split point reduces walking on entry and cuts through workpieces with less feed pressure. A gold oxide coating provides additional lubricity and wear resistance. This bit is sized at 15/32 inches in diameter with a 5-3/4 inch overall length, making it a standard jobber-length tool suited for drill press and hand drill use in professional shop and field environments.

The C70029 is intended for use on aluminum as its primary workpiece material, though the M42 cobalt construction handles a broad range of metals encountered in HVAC, mechanical, and industrial fabrication work. The straight-cylindrical shank at 15/32 inches fits standard three-jaw chucks without adapters. The spiral flute geometry with a regular spiral type promotes efficient chip evacuation during through-hole drilling. This bit conforms to NAS 907 Type J specifications, making it appropriate for aerospace and precision fabrication environments where dimensional tolerances matter.

Key Features

• M42 cobalt steel construction for extended tool life in heat-intensive drilling
• 135-degree split point reduces bit walking and lowers required feed force
• Gold oxide coating improves lubricity and surface wear resistance
• Web-thinned tapered web design reduces cutting resistance at center
• Right-hand cut spiral flute with 2 flutes for efficient chip removal
• Meets NAS 907 Type J specification for dimensional and performance standards

Compatibility

Designed as a jobber-length replacement or production drill bit for use in standard three-jaw drill chucks accepting a 15/32 inch straight-cylindrical shank, consistent with CLEVELAND Series 2213 tooling.

Installation Notes

Installation is performed by machinists, tool and die workers, and trade professionals using a drill press or hand drill with a compatible three-jaw chuck. Ensure the chuck is fully tightened and the workpiece is securely clamped before beginning a cut. Use appropriate cutting fluid for the workpiece material to maximize bit life. Inspect the cutting edges for wear before each use and replace the bit when point geometry shows degradation.