Cleveland C04604 Screw Machine Drill Bit 33/64 in Hss

Product Description

The CLEVELAND C04604 is a screw machine length drill bit designed for general-purpose metal drilling in production and job-shop environments. Built from high-speed steel (HSS) with a bright/uncoated finish, this bit features a 118-degree standard point angle and a web-thinned tip that reduces thrust and improves center starting. At 33/64 inch (0.5156 inch) diameter, it fits standard drill chucks and is sized for precise hole work in alloy steel and aluminum. The short overall length of 3-7/8 inches provides added rigidity compared to jobber-length bits, making it well suited for close-tolerance drilling applications.

Screw machine length drill bits like the C04604 are commonly used in CNC machining centers, drill presses, and manual lathes where stub-length rigidity is required. The straight-cylindrical shank allows direct chuck mounting without adapters. This bit is appropriate for production drilling in alloy steel and aluminum in both light manufacturing and maintenance-repair-operations (MRO) settings. It is typically installed by machinists, tool-and-die technicians, or experienced metalworking tradespeople.

Key Features

• 33/64 inch (0.5156 inch) diameter with a tight tolerance of +0.0000 to -0.0012 inch for consistent hole sizing
• 118-degree standard point angle with web-thinned tip reduces entry thrust and improves bit self-centering
• High-speed steel construction provides durability across general-purpose metalworking applications
• Short screw machine length (3-7/8 inches OAL) adds rigidity and reduces deflection versus jobber-length bits
• 2-flute regular spiral design with straight-cylindrical shank for standard chuck compatibility
• Meets ASME B94.11M and ANSI standards for dimensional and performance consistency

Compatibility

Designed as a general-purpose screw machine length drill bit suitable for use in standard drill chucks on drill presses, CNC machining centers, and manual lathes. Rated for drilling alloy steel and aluminum. Series 2120.

Installation Notes

Installation and use should be performed by qualified machinists or metalworking tradespeople. Secure the straight-cylindrical shank firmly in the drill chuck before operation and verify runout is within acceptable limits. Always power down or de-energize the machine spindle before inserting or removing the bit. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, even though this bit does not feature through-coolant capability.