Cleveland C70151 Cobalt Jobber Drill Bit Wire 18

Product Description

The CLEVELAND C70151 is a cobalt jobber-length drill bit designed for professionals who need consistent performance in tough or abrasive materials. Built from M42 cobalt high-speed steel and finished with a gold oxide coating, this bit delivers extended tool life compared to standard HSS options. It carries a 135-degree split point that reduces walking on entry and requires less feed pressure at start-up. The straight-cylindrical shank measures 0.1695 inches in diameter, matching the wire size 18 designation at a decimal diameter of 0.1695 inches. Overall length is 3.25 inches with a flute length of 2.125 inches. Machinists, tool-and-die techs, and sheet metal fabricators will find this bit well-suited to production and repair work.

The C70151 is rated for aluminum as its primary workpiece material, making it a practical choice for aerospace, HVAC fabrication, electrical enclosure work, and general light-metal drilling. The 2-flute right-hand spiral configuration evacuates chips efficiently during through-hole drilling in aluminum plate, sheet, and cast stock. Conforming to NAS 907 Type J standards, this bit is appropriate for shops and field operations that require documented specification compliance. It is sold individually, so technicians can replace a single bit without purchasing a full set.

Key Features

• M42 cobalt steel construction for increased heat and wear resistance over standard HSS
• 135-degree split point reduces drill walking and lowers entry feed pressure
• Gold oxide coating provides lubricity and corrosion resistance
• Web-thinned, tapered web for improved chip flow and reduced thrust
• Right-hand, regular spiral flute optimized for aluminum chip evacuation
• Meets NAS 907 Type J specification for documented-compliance applications

Compatibility

Fits any drill press, hand drill, or CNC spindle accepting a straight-cylindrical shank at 0.1695 inches diameter; rated for use in aluminum per the manufacturer specification for this series.

Installation Notes

This bit is installed by machinists, fabricators, and tool-and-die technicians using standard drill chucks or collet holders. Secure the shank fully in the chuck before operation and verify runout is within acceptable limits before beginning a cut. Use appropriate cutting fluid or coolant when drilling aluminum at sustained feed rates to maintain bit temperature and finish quality. Inspect the cutting edges for wear or chipping before each use and replace the bit if the split point shows rollover or the flutes show clogging damage.