Cleveland C15070 Screw Machine Drill Bit 3/8 in Cobalt

Product Description

The CLEVELAND C15070 is a screw machine length cobalt drill bit designed for demanding metal drilling applications in production and maintenance environments. Built to the 2175A series specification, it features a 3/8 inch diameter, a 135-degree split point for self-centering starts, and a parabolic flute geometry that promotes efficient chip evacuation. The overall length measures 3-1/8 inches with a 1-13/16 inch flute length, making it well suited for close-clearance and drill-press work. Machinists, tool-and-die technicians, and maintenance mechanics rely on this bit when drilling alloy steels and aluminum alloys that demand more heat resistance than standard high-speed steel provides.

This bit is intended for screw machine, drill press, and CNC drilling operations in both shop and field environments. Its stub-length profile reduces deflection in shallow-hole applications and in situations where minimal tool stick-out is required. Primary workpiece materials include alloy steels and aluminum. The right-hand cut, straight-cylindrical shank fits standard three-jaw chucks and collets sized for 3/8 inch tooling without adapters.

Key Features

• M42 cobalt material grade provides elevated heat and wear resistance for hard-metal drilling
• 135-degree split point reduces thrust force and eliminates the need for a center punch on most metals
• Parabolic flute geometry improves chip flow and reduces clogging in deep cuts
• Web-thinned, parallel-web construction maintains core strength while lowering cutting resistance
• Screw machine (stub) length minimizes deflection and improves hole-location accuracy
• Meets ASME B94.11M standards with a diameter tolerance of +0.0000 to -0.0010 inches

Compatibility

Designed as a direct-fit screw machine length drill bit for use with standard 3/8 inch straight-cylindrical chuck and collet tooling on drill presses, lathes, and CNC machining centers. Primary workpiece compatibility stated by the manufacturer includes alloy steel and aluminum.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance mechanics familiar with rotating cutting tools. Secure the shank fully in a properly rated chuck or collet before operation and confirm the spindle is at a complete stop before changing bits. Always use appropriate cutting fluid or coolant for the workpiece material, even though this bit does not include through-coolant capability. Follow applicable shop safety standards and machine guarding requirements when operating drilling equipment.