Cleveland C15093 Screw Machine Drill Bit Size 3 Cobalt

Product Description

The CLEVELAND C15093 is a screw machine length drill bit designed for high-production drilling in demanding materials. Built from M42 cobalt high-speed steel, it carries a 135-degree split point that reduces walking and lowers the thrust needed to start a hole without a center punch. The parabolic flute geometry improves chip evacuation, which matters in deep or interrupted cuts. Overall length is 2.375 inches with a flute length of 1.25 inches, keeping the bit rigid and reducing deflection in short-reach applications. The straight-cylindrical shank measures 0.2130 inches in diameter, fitting standard drill chucks. This bit is used by machinists, tool-and-die technicians, and maintenance trades who need a short, stiff drill for tight-clearance or fixture work.

The C15093 is sized to wire gauge number 3, equal to 0.2130 inches decimal. It is suited for drilling alloy steel and aluminum in screw machine setups, CNC drilling operations, drill press work, and hand-held power tool applications where a stub-length bit is required for rigidity. The 135-degree split point and web-thinned, parallel web configuration make it particularly effective when entering harder alloy steel without pilot drilling. No coolant-through capability is present, so external coolant or cutting fluid should be applied at the point of contact when drilling ferrous materials.

Key Features

• M42 cobalt HSS construction resists heat buildup when drilling alloy steel and aluminum
• 135-degree split point with web thinning reduces thrust and eliminates bit walking on entry
• Parabolic flute profile promotes fast chip clearance in both through and blind holes
• Screw machine (stub) length of 2.375 inches overall provides maximum rigidity and minimal deflection
• Right-hand cut, straight-cylindrical shank compatible with standard drill chucks and collets
• Meets ASME B94.11M and ANSI specification designation for dimensional consistency

Compatibility

Designed as a direct-fit screw machine length drill bit for any standard drill chuck or collet accepting a 0.2130-inch straight-cylindrical shank. Primary workpiece materials listed by the manufacturer are alloy steel and aluminum. Series 2175A.

Installation Notes

Secure the shank fully into the chuck and verify runout before drilling. When working ferrous materials, apply cutting fluid to the point to extend tool life and improve hole finish. Ensure the workpiece is firmly fixtured before operation to prevent movement under cutting load. Follow applicable shop safety standards and wear appropriate eye protection during all drilling operations.