Cleveland C70108 Cobalt Jobber Drill Bit 6.2mm

Product Description

The CLEVELAND C70108 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 when cutting through tough or abrasive materials. It features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The straight-cylindrical shank measures 0.2441 inches in diameter, and the overall length is 3.98 inches. Machinists, pipefitters, ironworkers, and maintenance trades use this bit with standard drill chucks in portable drills and drill presses.

This bit is sized at 6.2 mm (0.2441 inches) and fits within the 6.00 mm to 7.00 mm diameter range. It is well suited for drilling aluminum, steel, and similar metals in both shop and field environments. The 2-flute spiral design with a regular spiral type efficiently clears chips during drilling. The web-thinned, tapered web configuration reduces thrust and improves cutting performance on harder stock. It conforms to NAS 907 Type J standards, making it appropriate for aerospace and precision fabrication work where dimensional tolerances are critical.

Key Features

• M42 cobalt steel construction for heat resistance and extended tool life in hard materials
• 135-degree split point reduces drill walking and lowers required feed pressure
• Gold oxide coating provides lubricity and additional wear resistance
• Web-thinned tapered web reduces cutting thrust and improves penetration
• Straight-cylindrical shank fits standard 3-jaw drill chucks without adapters
• Meets NAS 907 Type J specification for precision and aerospace-grade applications

Compatibility

Designed as a jobber length replacement drill bit compatible with standard straight-shank drill chucks in portable drills, drill presses, and CNC drilling setups. Primary workpiece material is aluminum; the M42 cobalt grade also supports drilling of steel and other ferrous metals.

Installation Notes

This bit is installed and serviced by machinists, maintenance technicians, and trade professionals using standard drill chucks. Secure the shank fully in the chuck before operation and verify chuck key is removed before powering the drill. Use appropriate cutting fluid or coolant when drilling steel to manage heat buildup, even though this bit does not support coolant-through delivery. Follow applicable shop safety practices and wear eye protection during all drilling operations.