Cleveland C71306 Jobber Drill 10.20mm Hss Black Oxide

Product Description

The CLEVELAND C71306 is a jobber-length twist drill bit designed for general-purpose hole-making in steel and cast iron. Built from high speed steel with a black oxide coating, it resists heat buildup and wear during extended drilling operations. The 118-degree standard point angle suits a broad range of metalworking applications without requiring a specialized point grinder. The bit measures 10.20 mm (0.4016 inches) in diameter with an overall length of 5.2360 inches and a flute length of 3.4250 inches. A web-thinned, tapered web construction reduces thrust and improves chip clearance at the cutting edge.

This drill bit is suited for use on ferrous metals including mild steel and cast iron in production and maintenance environments. The straight cylindrical shank fits standard drill chucks on handheld drills, drill presses, and CNC machining centers without adapters. The regular spiral flute geometry provides efficient chip evacuation at conventional cutting speeds. It is appropriate for machinists, tool-and-die shops, maintenance technicians, and fabricators working in general metalworking settings.

Key Features

• 10.20 mm (0.4016 inch) diameter with a diameter tolerance of -0.0010 to 0.0000 inches for accurate hole sizing
• 118-degree standard point angle for general-purpose drilling in steel and cast iron
• High speed steel construction provides toughness and heat resistance during drilling
• Black oxide proprietary coating reduces friction and provides corrosion resistance in storage
• Web-thinned tapered web reduces drilling thrust and improves chip flow
• Conforms to ASME B94.11M and DIN 338 standards for consistent dimensional accuracy

Compatibility

Designed as a general-purpose jobber drill bit for use in steel and cast iron workpieces. The straight cylindrical shank is compatible with standard drill chucks across handheld, bench, and machine tool platforms.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Secure the workpiece and ensure the chuck is tightened fully before operation. Use appropriate cutting fluid or coolant when drilling steel to extend tool life, as this bit does not have through-coolant capability. Follow machine manufacturer speed and feed recommendations for the material being drilled.