Cleveland C70109 Cobalt Jobber Drill Bit 6.3mm 135

Product Description

The CLEVELAND C70109 is a cobalt jobber length drill bit designed for precision hole-making in metal and other demanding materials. Built from M42 grade cobalt high-speed steel and finished with a gold oxide coating, it delivers extended tool life in high-heat drilling applications. The bit features a 135-degree split point that reduces walking on entry and allows drilling without a center punch on most surfaces. At 3.98 inches overall length with a 2.48-inch flute, it fits standard jobber-length drill chucks. Right-hand spiral flutes clear chips efficiently during through-hole and blind-hole operations. This bit is suited for machinists, maintenance technicians, pipefitters, and HVAC or plumbing contractors who drill into aluminum, steel, and similar workpiece materials.

The C70109 is sized at 6.3 mm (0.2480 inches) and is a direct fit for use in standard drill presses, hand drills, and magnetic base drills. Its primary rated workpiece material is aluminum, though the M42 cobalt construction handles stainless steel, mild steel, and other hard metals common in mechanical and trade work. The straight-cylindrical shank diameter of 0.2480 inches seats securely in keyed or keyless chucks. It is sold individually and meets NAS 907 Type J standards.

Key Features

• M42 cobalt high-speed steel construction for heat resistance and extended cutting life
• 135-degree split point reduces thrust and eliminates center-punch requirement on most materials
• Gold oxide coating reduces friction and provides light corrosion resistance during storage
• Web-thinned, tapered web design improves chip evacuation and reduces cutting load
• Right-hand spiral flute with regular helix keeps chips moving out of the hole
• Meets NAS 907 Type J specification for dimensional and performance consistency

Compatibility

Designed for use in standard jobber-length drill chucks accepting a 0.2480-inch straight-cylindrical shank. Rated for aluminum as primary workpiece material per Cleveland Series 2213 specifications.

Installation Notes

Install in a properly rated drill press, hand drill, or magnetic base drill and confirm the chuck is tightened securely before operation. Use appropriate cutting fluid or lubricant when drilling steel or stainless to prevent premature edge wear. Secure the workpiece firmly to prevent movement during drilling. Wear appropriate PPE including eye protection whenever operating rotary cutting tools.