Cleveland C70036 Cobalt Jobber Drill Bit 6.53mm 135

Product Description

The CLEVELAND C70036 is a cobalt jobber-length drill bit designed for precision hole-making in metalworking and fabrication applications. Built from M42 cobalt high-speed steel and finished with a gold oxide coating, this bit delivers extended tool life under high-heat cutting conditions. It features a 135-degree split point that reduces walking on entry and lowers the thrust required to start a hole. The 2-flute spiral design with a web-thinned, tapered web configuration promotes efficient chip evacuation. With an overall length of 4.125 inches and a flute length of 2.875 inches, the C70036 meets NAS 907 Type J standards and is rated heavy duty for demanding production use.

This drill bit is suited for drilling aluminum and other non-ferrous and ferrous metals in shop, field, and production environments. The straight cylindrical shank seats securely in standard drill chucks and collet-style holders. Machinists, maintenance mechanics, and fabricators working on aerospace, industrial, and general metalworking tasks will find this bit a reliable choice for consistent, repeatable hole diameter output within a -0.0010 to 0.0000 inch tolerance. It is sold individually and ships as a single unit.

Key Features

• M42 cobalt steel construction for heat resistance and extended tool life in hard materials
• 135-degree split point reduces entry walking and lowers drilling thrust
• Gold oxide coating provides added lubricity and corrosion resistance
• Web-thinned tapered web improves chip flow and reduces cutting torque
• Right-hand cut, regular spiral flute geometry for standard drilling operations
• Meets NAS 907 Type J specification for aerospace and industrial quality requirements

Compatibility

Designed as a jobber-length drill bit for use in standard drill chucks, drill presses, and CNC machining centers accepting a 0.2570-inch straight cylindrical shank. Primary workpiece material rating is aluminum, with general applicability across non-ferrous metals and softer ferrous stock.

Installation Notes

Install in a properly sized drill chuck or collet, ensuring the shank is fully seated and the chuck is tightened to manufacturer specification before use. Secure the workpiece firmly before drilling to prevent movement and ensure hole accuracy. Apply cutting fluid or coolant as appropriate for the workpiece material, noting that this bit does not support coolant-through delivery. Inspect the cutting edges for wear or chipping before each use and replace when diameter tolerance or point geometry is compromised.