Cleveland C71078 Jobber Drill Bit Letter H Hss Oxide

Product Description

The CLEVELAND C71078 is a jobber-length drill bit sized to letter H (0.2660 inches), manufactured from high speed steel with an oxide coating for added lubricity and corrosion resistance. It features a 118-degree standard point angle, a two-flute regular spiral configuration, and a straight-cylindrical shank. The web-thinned, tapered web design reduces thrust requirements and improves chip evacuation. With an overall length of 4.125 inches and a flute length of 2.875 inches, this bit is suited for general-purpose drilling in metal, wood, and plastics. It is installed by machinists, maintenance technicians, pipefitters, and sheet metal workers across industrial and trade environments.

The C71078 is a Series 2001G jobber drill conforming to ASME B94.11M and DIN 338 standards, placing it within a globally recognized dimensional and performance envelope. It is appropriate for right-hand drilling in a wide range of base materials in both shop and field settings. The 0.2660-inch diameter falls in the 0.2500 to 0.3000 inch size range, making it a common choice for clearance holes, pilot holes, and through-hole applications on standard drill presses, hand drills, and CNC drilling equipment.

Key Features

• Letter H size — 0.2660 inches diameter with a tolerance of -0.0010 to 0.0000 inches
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction with oxide finish for heat and wear resistance
• Regular spiral, two-flute design promotes efficient chip removal
• Straight-cylindrical shank at 0.2660 inches diameter, 1.250 inches long, fits standard chucks
• Meets ASME B94.11M and DIN 338 standards for consistent dimensional accuracy

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard 3-jaw drill chucks on bench drill presses, hand drills, and CNC machining centers that accept straight-cylindrical shanks in the 0.2660-inch diameter range.

Installation Notes

Secure the shank firmly in the chuck before operation and verify runout is within acceptable limits for the application. Use appropriate cutting fluid or cutting oil when drilling ferrous metals to extend tool life and maintain hole quality. Always wear eye protection and follow applicable shop safety procedures. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.