Cleveland C15145 Drill Bit Letter P 135 Point Cobalt

Product Description

The CLEVELAND C15145 is a screw machine length drill bit designed for high-performance drilling in demanding production environments. Built from M42 cobalt high-speed steel, it carries a 135-degree split point with web thinning for fast, accurate starts without center punching. The parabolic flute geometry promotes efficient chip evacuation, reducing heat buildup during extended runs. At 2-15/16 inches overall length with a straight-cylindrical shank measuring 0.3230 inches in diameter, this bit fits standard drill chucks and CNC toolholding without adapters. It is sized to Letter P, equivalent to 0.3230 inches decimal, and is manufactured to ASME B94.11M standards. Licensed machinists and journeyman mechanics reaching for a stubby, rigid bit for close-clearance work will find the Series 2175A geometry well matched to the task.

This bit is intended for drilling alloy steels and aluminum in screw machine operations, turret lathe setups, CNC machining centers, and general production drilling where a shorter, stiffer tool is preferred over jobber length. The cobalt M42 grade provides improved heat and wear resistance compared to standard M2 high-speed steel, making it a practical choice for interrupted cuts and harder workpiece materials. The right-hand cut, parallel web configuration, and 2-flute design are standard for general-purpose metal drilling across job shops and production floors.

Key Features

• M42 cobalt high-speed steel construction for elevated heat and wear resistance
• 135-degree split point with web thinning for self-starting accuracy and reduced thrust
• Parabolic flute geometry for efficient chip evacuation in deep holes
• Screw machine (stub) length provides increased rigidity and reduced deflection
• Straight-cylindrical shank at 0.3230 inches diameter for broad chuck compatibility
• Manufactured to ASME B94.11M standards with ANSI specification designation

Compatibility

Designed as a direct-fit screw machine length drill bit for use in standard drill chucks, collet holders, and CNC tooling systems accepting a 0.3230-inch straight shank. Primary workpiece materials include alloy steel and aluminum per Series 2175A specifications.

Installation Notes

Installation is performed by machinists or tool-and-die technicians. Secure the shank fully in the chuck or collet before engaging the spindle, and verify runout is within acceptable limits for the application. Disconnect and lock out all power to the machine before changing or setting tooling. Do not exceed the recommended feed and speed parameters for the workpiece material and machine spindle rating.