Cleveland C14618 Screw Machine Drill Bit 8 Cobalt

Product Description

The CLEVELAND C14618 is a wire size 8 screw machine length drill bit designed for fast, accurate drilling in demanding shop and field applications. Built from M42 cobalt high-speed steel, it handles heat and wear better than standard HSS bits, making it the right choice for alloy steels, aluminum, and other tough materials. The 135-degree split point starts on contact without a center punch and reduces walking on smooth or curved surfaces. At 2.25 inches overall length, the stub-length body provides greater rigidity and reduced deflection compared to jobber-length equivalents. This bit is sold and used by machinists, tool-and-die techs, and maintenance professionals who need reliable performance in screw machine and drill press setups.

The C14618 is a screw machine length bit suited for production drilling, CNC work, manual drill press operations, and hand-held drilling in tight clearance situations. Its short overall length minimizes runout and chatter. Primary workpiece materials listed by the manufacturer include alloy steel and aluminum. The regular spiral with parallel web and web-thinned geometry optimizes chip evacuation and reduces thrust load, which is particularly useful in high-cycle production environments.

Key Features

• M42 cobalt construction for extended tool life in hard and abrasive materials
• 135-degree split point for self-centering starts and reduced thrust
• Web-thinned, parallel web geometry improves chip flow and reduces heat buildup
• Screw machine length body provides rigidity and minimizes deflection
• Right-hand cut with straight-cylindrical shank fits standard drill chucks
• Meets ASME B94.11M and DIN 1897 dimensional standards

Compatibility

Designed as a heavy-duty screw machine length bit for use in drill presses, screw machines, CNC machining centers, and standard drill chucks accepting a 0.1990-inch straight-cylindrical shank. Rated for primary workpiece materials including alloy steel and aluminum per manufacturer specifications.

Installation Notes

This bit is installed and changed by machinists or maintenance technicians using a standard drill chuck or collet system. Ensure the machine is fully powered down and the chuck is secured before seating or removing the bit. Coolant-through is not supported on this bit, so external cutting fluid or mist coolant should be applied when drilling hard alloys to preserve edge life. Follow shop-specific speeds and feeds for cobalt tooling at the 0.1990-inch diameter range.