Cleveland C03142 Jobber Length Drill Bit Letter W Hss

Product Description

The CLEVELAND C03142 is a jobber length drill bit sized to Letter W (0.3860 inches), designed for general-purpose drilling in a wide range of materials including aluminum. Built from high speed steel with a bright, uncoated finish, this bit features a 118-degree standard point angle and a fast spiral flute configuration. The web-thinned, tapered web design reduces thrust at the point for cleaner entry. With an overall length of 5.125 inches and a flute length of 3.75 inches, it fits the standard jobber length profile used by machinists, maintenance techs, and metalworking professionals every day.

This drill bit is suited for production and maintenance drilling applications in metals, plastics, and composites. The Letter W size (0.3860 inches) places it in the 0.3500 to 0.4000 inch size range, making it a common choice when a close-tolerance hole is needed before reaming or tapping. The straight-cylindrical shank seats directly in standard 3-jaw drill chucks and most keyed and keyless chuck systems. The Series 2012 designation places it within a well-established Cleveland general-purpose line built to ASME B94.11M standards.

Key Features

• Letter W size: 0.3860 inches diameter for precise hole sizing
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Fast spiral, 2-flute design promotes chip evacuation
• High speed steel construction handles a broad range of workpiece materials
• Bright uncoated finish for easy wear inspection during use
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets ASME B94.11M and ANSI specification requirements

Compatibility

Designed as a general-purpose jobber length drill bit compatible with any standard drill chuck accepting a 0.3860-inch straight-cylindrical shank, including benchtop drill presses, CNC drilling centers, and hand-held power drills.

Installation Notes

Installation and use of this drill bit is performed by machinists, maintenance mechanics, and metalworking technicians. Secure the shank fully in the chuck and verify runout before drilling. Always power down and de-energize the machine before changing bits. When drilling metals, use appropriate cutting fluid where the workpiece material and setup allow to extend tool life and maintain hole quality.