Cleveland C15101 Screw Machine Drill Bit Wire 11 Cobalt

Product Description

The CLEVELAND C15101 is a screw machine length drill bit designed for high-performance drilling in demanding materials. Built from M42 cobalt high-speed steel, it carries a 135-degree split point that reduces walking on entry and requires no center punch in most applications. The parabolic flute geometry promotes efficient chip evacuation, reducing heat buildup during aggressive drilling cycles. At 2.25 inches overall length, the screw machine format keeps the bit compact and rigid, making it well-suited for drill press and CNC machining operations where stick-out must be minimized. This bit is intended for installation and use by machinist trade professionals and tool-and-die technicians.

The C15101 is sized to wire gauge number 11, with a decimal diameter of 0.1910 inches, and is rated for primary workpiece materials including alloy steel and aluminum. The straight cylindrical shank with a diameter of 0.1910 inches fits standard drill chucks without a reducer. The screw machine length format is a common choice in production and maintenance environments where rigidity and precision hole location are priorities. Flute length is 1.1875 inches and shank length is 1.0625 inches. This bit is manufactured to ASME B94.11M standards with an ANSI specification designation.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• 135-degree split point with web thinning reduces entry force and improves hole location accuracy
• Parabolic flute design with parallel web configuration promotes fast chip removal
• Screw machine length format provides added rigidity versus jobber-length bits
• Right-hand cut with straight cylindrical shank for universal chuck compatibility
• Diameter tolerance held to +0.0000 to -0.0007 inches per ASME B94.11M

Compatibility

Designed as a direct-fit replacement or standard addition to tooling sets requiring a wire gauge number 11 screw machine length drill bit in the 0.1500 to 0.2000 inch decimal size range. Fits any standard drill chuck or collet accepting a 0.1910-inch straight cylindrical shank.

Installation Notes

Install and remove this bit with the spindle fully stopped and the machine isolated from power. Secure the shank fully within the chuck or collet to the manufacturer-recommended engagement depth to prevent slippage under load. Use appropriate cutting fluid for the workpiece material, particularly when drilling alloy steels, to extend tool life and maintain tolerance. Inspect the cutting edges for wear before each use and replace when point geometry is compromised.