Cleveland C04363 Screw Machine Drill Bit No. 56 Hss

Product Description

The CLEVELAND C04363 is a screw machine length (stub length) twist drill bit sized to wire gauge No. 56, equal to 0.0465 inches in diameter. Built from high-speed steel with a bright, uncoated finish, it features a 118-degree standard point angle, two spiral flutes, and a straight-cylindrical shank. The short overall length of 1.375 inches (1-3/8 inches) provides added rigidity in screw machine and turret lathe setups, reducing deflection on small-diameter holes. This bit is designed for general-purpose drilling and is installed by machinists, tool-and-die professionals, and maintenance technicians working with small-bore applications.

The C04363 is suited for drilling alloy steel and aluminum in production machining environments where a compact, rigid drill is needed in confined or high-speed setups. The screw machine length format fits standard drill chucks, screw machines, CNC lathes, and benchtop drill presses. The right-hand cut and parallel web configuration with web thinning support consistent chip evacuation in short, repetitive drilling cycles on close-tolerance work. General-purpose grade construction makes it appropriate for job shop and production floor use alike.

Key Features

• Wire gauge No. 56 diameter: 0.0465 inches for tight-tolerance small-bore drilling
• High-speed steel construction for general-purpose performance across alloy and aluminum workpieces
• 118-degree standard point angle with web thinning for reduced entry force and improved centering
• Screw machine (stub) length at 1.375 inches OAL provides rigidity and reduces deflection
• Straight-cylindrical shank at 0.0465 inches diameter fits standard collets and chucks
• Right-hand cut with regular spiral flutes for reliable chip clearance
• Meets ASME B94.11M dimensional standards

Compatibility

Designed as an OEM-style general-purpose screw machine length drill bit for use in standard drill chucks, collets, and turret lathe tooling that accept straight-cylindrical shanks at 0.0465 inches diameter. Listed under Cleveland Series 2120.

Installation Notes

This drill bit is installed by machinists and maintenance technicians using standard chuck or collet toolholding equipment. Secure the shank fully in the chuck before operating and verify runout before drilling production parts. At 0.0465 inches diameter, the bit is susceptible to breakage under side load or misalignment — use appropriate feed rates and avoid forcing the cut. Always power down and de-energize the machine spindle before changing tooling.