Cleveland C70220 Cobalt Jobber Drill Bit 1.9mm

Product Description

The CLEVELAND C70220 is a cobalt jobber length drill bit designed for high-performance drilling in demanding shop and field applications. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit delivers heat and wear resistance beyond standard HSS tooling. It features a 135-degree split point for fast penetration and reduced walking on entry, and a right-hand spiral flute geometry optimized for chip evacuation. At 1.81 inches overall length with a 0.0748-inch straight-cylindrical shank, it fits standard drill chucks without adapters. Machinists, maintenance mechanics, and trade professionals working in metal fabrication and equipment service are the primary users.

This drill bit is sized at 1.9 mm (0.0748 inches decimal equivalent) and is rated for drilling aluminum as the primary workpiece material, though cobalt construction makes it well-suited for other non-ferrous and ferrous metals encountered in HVAC, plumbing, and electrical rough-in work. The regular spiral flute and tapered web configuration support consistent chip flow during through-hole and blind-hole drilling. The bit conforms to NAS 907 Type J standards, making it appropriate for specification-driven work environments.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• 135-degree split point reduces thrust force and eliminates center-punch requirement on most materials
• Gold oxide finish provides lubricity and corrosion resistance
• Right-hand cut with regular spiral flute and web-thinned, tapered web for efficient chip evacuation
• Straight-cylindrical shank fits standard 3-jaw drill chucks
• Meets NAS 907 Type J specification for heavy-duty grade tooling

Compatibility

Designed as a jobber-length replacement or supplemental drill bit for use in standard drill chucks and drill presses accepting a 0.0748-inch straight-cylindrical shank; primary workpiece material rating is aluminum per manufacturer specification.

Installation Notes

Install the shank fully into the chuck and tighten securely before operation. Use appropriate cutting fluid or lubricant when drilling metals to extend bit life and improve hole finish. Inspect the cutting edges before each use and replace if chipping or dulling is observed. Follow applicable shop safety protocols including eye protection and secure workpiece fixturing.