Cleveland C70189 Cobalt Drill Bit No 56 0.0465 in

Product Description

The CLEVELAND C70189 is a cobalt jobber length drill bit in wire gauge size No. 56, measuring 0.0465 inches in diameter. Built from M42 cobalt high-speed steel and finished with a gold oxide coating, this bit is engineered for heavy-duty drilling in tough and abrasive materials. The 135-degree split point reduces walking on entry and lowers thrust requirements compared to a conventional 118-degree point. The web-thinned, tapered web design further reduces cutting resistance. Licensed HVAC technicians, machinists, plumbers, and electricians routinely reach for cobalt bits when drilling through hardened or work-hardening metals where standard HSS bits wear prematurely.

This drill bit is suited for precision drilling in aluminum and similar non-ferrous and ferrous workpiece materials where tight tolerances and clean hole finishes are required. With a straight-cylindrical shank at 0.0465 inches in diameter and a 1.0000-inch shank length, it seats securely in standard drill chucks. The regular spiral flute and right-hand cutting direction make it compatible with conventional drill press and hand-drill setups. It meets NAS 907 Type J standards, which is relevant for aerospace-adjacent and precision trade applications. Sold individually, with a minimum order quantity of 12 units.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• Gold oxide coating reduces friction and aids chip evacuation
• 135-degree split point minimizes bit walking and reduces feed pressure
• Web-thinned tapered web lowers cutting resistance for cleaner entry
• Right-hand spiral flute with straight-cylindrical shank fits standard drill chucks
• Meets NAS 907 Type J specification for precision and aerospace-grade applications

Compatibility

Designed for use in standard drill presses and hand drills accepting a 0.0465-inch straight-cylindrical shank. Primary workpiece material listed is aluminum; the M42 cobalt grade is also appropriate for stainless steel, hardened alloys, and other work-hardening metals. Series 2213.

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before operation. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life, noting that this bit does not support through-coolant delivery. Allow the bit to clear chips regularly during deep drilling to prevent flute packing and overheating. Wear appropriate eye protection and follow applicable OSHA and shop-safety guidelines during all drilling operations.