Cleveland C03152 Jobber Drill Bit 27/64 Inch Hss

Product Description

The CLEVELAND C03152 is a jobber-length drill bit designed for general-purpose drilling in metal, aluminum, and similar materials. Ground from high speed steel (HSS) with a bright, uncoated finish, this bit delivers reliable performance in standard shop and field drilling applications. The 27/64-inch diameter corresponds to a decimal size of 0.4200 inches. A 118-degree standard point angle suits a wide range of common materials. Web thinning at the tip reduces thrust requirements and improves center-starting accuracy. The overall length is 5-3/8 inches with a flute length of 3-15/16 inches, placing it squarely in the jobber-length class used by machinists, HVAC technicians, plumbers, and general contractors for through-hole and clearance-hole work.

This bit is suited for drilling aluminum, mild steel, and other common workpiece materials in both shop and field settings. The fast spiral flute promotes efficient chip evacuation when drilling soft to medium-hardness materials. The straight cylindrical shank measures 27/64 inch in diameter and seats directly into standard three-jaw drill chucks without requiring a reducer or adapter. Typical applications include fastener clearance holes, conduit knockout prep, sheet metal fabrication, and general structural drilling tasks encountered in mechanical and electrical trade work.

Key Features

• High speed steel construction for durability across general-purpose drilling tasks
• 118-degree standard point angle for broad material compatibility
• Web-thinned tip with tapered web configuration reduces entry thrust and improves starting accuracy
• Fast spiral flute promotes chip evacuation when drilling aluminum and soft metals
• Bright, uncoated finish suitable for dry or lightly lubricated drilling
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets ASME B94.11M dimensional standard

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw drill chuck or drill press capable of accepting a straight cylindrical shank in the 27/64-inch size range.

Installation Notes

Install this bit into a properly sized three-jaw chuck and tighten with a chuck key before drilling. Ensure the workpiece is securely clamped before starting the drill to prevent walking or grab, particularly on metal surfaces. Apply cutting fluid or light oil when drilling ferrous materials to extend bit life and reduce heat buildup. Inspect the cutting edges for wear regularly and replace the bit when point geometry degrades to avoid oversized or out-of-round holes.