Cleveland C72078 Jobber Length Drill Bit Letter H Hss

Product Description

The CLEVELAND C72078 is a jobber-length drill bit sized to Letter H (0.2660 inches) and manufactured from high speed steel with a bright, uncoated finish. It features a standard 118-degree split point with web thinning and a tapered web configuration, which reduces walking and lowers thrust on entry. The two-flute spiral design with regular helix promotes efficient chip evacuation during through-hole drilling. At 4.125 inches overall length with a 2.875-inch flute, this bit falls within the classic jobber-length envelope suited for hand-held and machine drilling alike. It is installed and used by machinists, maintenance technicians, HVAC fabricators, and general trade professionals working in metal, wood, and plastics.

This drill bit is designed for general-purpose drilling in a wide range of materials including mild steel, aluminum, cast iron, thermoplastics, and wood composites. The straight-cylindrical shank at 0.2660 inches diameter fits standard three-jaw drill chucks on portable drills, drill presses, and CNC turret machines. The Series 2002G classification places it within a family of general-purpose jobber bits intended for production and maintenance environments where repeatable hole quality at a consistent diameter tolerance of -0.0010 to 0.0000 inches is required.

Key Features

• Letter H size at 0.2660 inches decimal equivalent for consistent, measurable fitment
• 118-degree standard point angle with web thinning reduces entry thrust and minimizes walking
• High speed steel construction handles interrupted cuts and moderate heat buildup
• Bright uncoated finish allows visual inspection of wear and edge condition
• Two-flute regular spiral geometry promotes clean chip evacuation in through-hole applications
• Meets ASME B94.11M and DIN 338 standards for jobber-length drill geometry

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw chuck accepting a 0.2660-inch straight-cylindrical shank, including portable drills, bench drill presses, and turret drilling machines.

Installation Notes

Secure the shank fully in the chuck and verify runout before drilling. Power down the drill press or disconnect the tool from power before changing bits. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend edge life, even though this bit does not feature through-coolant capability. Follow shop safety protocols and applicable OSHA standards for rotating tool operation.