Cleveland C14239 Cobalt Drill Bit 43/64 Inch 135 Point

Product Description

The CLEVELAND C14239 is a cobalt screw machine length drill bit designed for high-performance drilling in tough materials. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention that standard HSS bits cannot match. The 135-degree split point reduces walking and allows immediate cutting engagement without a center punch. At 4.625 inches overall length with a 2.875-inch parabolic flute, this stub-length geometry provides rigidity and reduced deflection in drill press and CNC applications. The straight cylindrical shank measures 0.6719 inches in diameter, matching the bit diameter for secure chuck retention. Machinists and fabricators reach for this bit when drilling alloy steel, aluminum, and other demanding workpiece materials.

The C14239 is suited for production machining, fabrication shops, and metalworking operations where shorter bit length means better stability and tighter hole tolerances. Its screw machine length profile fits standard drill presses, CNC machining centers, and production fixtures without extension. The parabolic flute geometry improves chip evacuation, which is especially useful when drilling deeper holes in aluminum or gummy alloys. Right-hand cutting direction is standard for all conventional drilling setups.

Key Features

• M42 cobalt construction for heat resistance and extended tool life in alloy and abrasive materials
• 135-degree split point for reduced thrust and self-centering entry without a center punch
• Parabolic flute geometry promotes fast chip evacuation and reduces heat buildup
• Web-thinned, parallel web configuration lowers cutting forces on harder stock
• Screw machine length (stub) design maximizes rigidity and minimizes deflection
• Meets ASME B94.11M dimensional standards for consistent sizing and interchangeability

Compatibility

Designed as a direct-fit replacement or production bit for any drill press, CNC machining center, or handheld drill with a chuck capacity accepting a 0.6719-inch straight cylindrical shank. Primary workpiece compatibility includes alloy steel and aluminum per manufacturer specification.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling professional familiar with metal-cutting operations. Secure the shank fully in the chuck and confirm runout before starting a cut. Power down and de-energize the machine before changing bits or adjusting workpiece fixtures. Do not exceed the recommended feed and speed parameters for the workpiece material to avoid premature edge failure or bit breakage.