Cleveland C04640 Screw Machine Drill Bit 3/4 in Hss

Product Description

The CLEVELAND C04640 is a screw machine length drill bit designed for general-purpose metal drilling in industrial and trade applications. Built from high-speed steel with a bright, uncoated finish, it features a 118-degree standard point angle and a 3/4-inch diameter with a tight diameter tolerance of +0.0000 to -0.0012 inches. The shorter overall length of 5 inches makes it well suited for work in confined spaces or on drill press setups where rigidity matters. The web-thinned geometry reduces thrust and improves chip evacuation. Machinists, fabricators, and maintenance technicians are the primary installers of this bit.

This bit is intended for drilling alloy steel, aluminum, and similar workpiece materials in production and maintenance environments. The screw machine length format is commonly used in CNC lathes, drill presses, and turret setups where a shorter, stiffer drill profile reduces deflection and improves hole accuracy. The straight-cylindrical shank accommodates standard three-jaw drill chucks across a wide range of machines. It conforms to ASME B94.11M standards and carries the ANSI specification designation, making it a code-compliant choice for shop and field use.

Key Features

• 3/4-inch diameter with a diameter tolerance of +0.0000 to -0.0012 inches for consistent hole sizing
• 118-degree standard point angle with web-thinned geometry for reduced entry thrust
• High-speed steel construction for durability across ferrous and non-ferrous workpiece materials
• 5-inch overall length in screw machine (short) format for improved rigidity and reduced deflection
• Straight-cylindrical shank compatible with standard drill chucks
• Right-hand cut, two-flute spiral design for efficient chip removal
• Meets ASME B94.11M and ANSI standards

Compatibility

Designed as a general-purpose replacement or stock drill bit for use in drill presses, CNC lathes, and turret machines that accept a 3/4-inch straight-cylindrical shank. Suitable for drilling alloy steel and aluminum workpiece materials.

Installation Notes

Installation is performed by machinists or maintenance technicians in shop or field settings. Secure the straight-cylindrical shank firmly in a properly sized drill chuck before operating. Ensure the machine is powered down and locked out before changing or inspecting the bit. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole tolerance.