Cleveland C04506 Letter D Hss Screw Machine Drill Bit

Product Description

The CLEVELAND C04506 is a screw machine length drill bit sized to Letter D, equivalent to 0.2460 inches in diameter, designed for general-purpose drilling in metal fabrication and machining applications. Built from high-speed steel with a bright, uncoated finish, it features a 118-degree standard point angle and a two-flute, right-hand spiral configuration. The overall length is 2.5 inches, making it shorter and more rigid than a jobber-length bit, which reduces deflection during drilling. A web-thinned tip lowers entry resistance and improves centering on the workpiece. Machinists, tool-and-die workers, and maintenance technicians install this bit in drill presses, lathes, and CNC equipment.

This bit is suited for drilling alloy steel, aluminum, and similar materials in both production and maintenance environments. The screw machine length format is a standard choice for turret lathes, automatic screw machines, and short-reach drill press setups where rigidity and compact tooling are required. The straight-cylindrical shank at 0.2460 inches diameter fits standard three-jaw chucks and collet holders without adapters. It conforms to ASME B94.11M standards and falls within the Series 2120 product line from CLEVELAND.

Key Features

• Letter D diameter at 0.2460 inches with a tight tolerance of +0.0000 to -0.0007 inches
• 118-degree standard point angle with web-thinned tip for reduced entry force
• High-speed steel construction for general-purpose performance on alloy and aluminum workpieces
• Screw machine (short) length at 2.5 inches overall for increased rigidity and reduced deflection
• Bright, uncoated finish compatible with standard cutting fluids and lubricants
• Right-hand cut with regular spiral flutes for efficient chip evacuation

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit conforming to ASME B94.11M for use in standard three-jaw chucks and collet systems accepting a 0.2460-inch straight-cylindrical shank. Suitable for drilling alloy steel and aluminum as noted in the product specifications.

Installation Notes

Installation is performed by machinists or qualified maintenance technicians. Secure the straight shank firmly in the chuck or collet before operation and verify runout with a dial indicator if tight tolerances are required. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve hole finish. Inspect the cutting edges for wear or chipping before each use; a worn web-thinned point should be reground or the bit replaced to maintain dimensional accuracy.