Cleveland C04661 Screw Machine Drill Bit 15/16 in Hss

Product Description

The CLEVELAND C04661 is a screw machine length drill bit designed for high-throughput metal drilling in industrial and trade applications. Built from high-speed steel (HSS) with a bright, uncoated finish, it features a 118-degree standard point angle and a web-thinned tip for reduced thrust and easier starting. The 15/16-inch (0.9375 inch) diameter runs with a right-hand spiral cut and a straight cylindrical shank. Overall length is 5.75 inches, with a flute length of 3.75 inches, making it shorter and more rigid than jobber-length equivalents — a practical advantage when drilling in tight setups or with minimal stick-out. Licensed machinists and maintenance trades install this bit in production drilling, CNC turret work, and manual drill press operations.

The C04661 is suited for drilling alloy steel and aluminum in general-purpose shop and field applications. Its short overall length improves rigidity during high-feed drilling operations and reduces deflection compared to standard jobber-length bits. Typical install scenarios include production machining environments, maintenance repair operations, and fabrication shops where consistent hole quality in ferrous and non-ferrous materials is required. The Series 2120 designation places this bit in Cleveland's general-purpose screw machine length lineup, conforming to ASME B94.11M and ANSI standards.

Key Features

• High-speed steel construction for general-purpose drilling in alloy steel and aluminum
• 118-degree standard point angle with web-thinned tip for reduced starting thrust
• Screw machine (stub) length at 5.75 inches OAL for increased rigidity and reduced deflection
• Right-hand, regular spiral with two flutes and a straight cylindrical shank
• Bright uncoated finish suitable for use with or without cutting fluid
• Diameter tolerance of +0.0000 to -0.0012 inch for consistent hole sizing

Compatibility

Designed as a general-purpose screw machine length drill bit conforming to ASME B94.11M and ANSI standards, compatible with drill presses, CNC turret machines, and hand-held drilling equipment accepting a 0.9375-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists, tool-and-die technicians, and maintenance trades using standard drill chucks or collet systems rated for the shank diameter. Ensure the machine spindle and chuck are free of chips and properly tightened before use. Apply appropriate cutting fluid when drilling alloy steel to extend tool life and maintain hole quality. Inspect the point geometry and web condition before each use and regrind or replace when cutting edges show wear.