Cleveland C71286 Jobber Drill Bit 8.10 Mm Hss Black Oxide

Product Description

The CLEVELAND C71286 is a high speed steel jobber-length drill bit designed for general-purpose drilling in metal, wood, and plastic. It features a 118-degree standard point angle with web thinning for easier penetration and reduced thrust. The black oxide coating provides mild corrosion resistance and helps retain cutting fluid at the tip. At 4.606 inches overall length with a 2.953-inch flute, this bit delivers the reach and chip evacuation typical of jobber-length tooling. The straight cylindrical shank measures 0.3189 inches in diameter, compatible with standard drill chucks. Machinists, maintenance technicians, and fabrication professionals will find this bit suited for everyday hole-making operations.

The C71286 is built for general-purpose drilling in production and maintenance environments. The right-hand spiral flute geometry promotes efficient chip removal during through-hole and blind-hole applications in ferrous and non-ferrous materials. Conforming to ASME B94.11M and DIN 338 standards, this bit fits into workflows where dimensional accuracy and consistent tolerances are required. The 4xD flute-to-diameter ratio supports stable drilling across a range of workpiece materials and thicknesses.

Key Features

• High speed steel construction for strength and wear resistance in general-purpose drilling
• Black oxide finish for mild corrosion resistance and reduced friction at the cutting edge
• 118-degree standard point with web thinning for reduced entry thrust and improved centering
• Right-hand regular spiral flute for efficient chip evacuation
• Straight cylindrical shank fits standard 3-jaw drill chucks without adapters
• Meets ASME B94.11M and DIN 338 dimensional standards

Compatibility

Designed as an OEM-style general-purpose jobber drill bit compatible with standard drill chucks and drill presses accepting a 0.3189-inch straight shank, conforming to DIN 338 and ASME B94.11M specifications.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard drill press, hand drill, or CNC drilling machine. Secure the shank fully in the chuck and verify concentricity before drilling to avoid bit deflection. Always wear appropriate eye protection and secure the workpiece before operation. Follow applicable shop safety standards and machine manufacturer guidelines when setting feed rate and spindle speed for the material being drilled.