Cleveland C04638 Screw Machine Drill Bit 47/64 in Hss

Product Description

The CLEVELAND C04638 is a screw machine length drill bit designed for general-purpose drilling in metal fabrication, machining, and industrial maintenance applications. Built from high-speed steel with a bright uncoated finish, this bit features a 47/64 inch (0.7344 inch decimal) diameter and a 118-degree standard point angle. The shorter overall length of 5 inches improves rigidity compared to jobber-length bits, reducing deflection and improving hole accuracy in heavy-stock operations. A two-flute spiral configuration and web-thinned design promote efficient chip evacuation. This bit is installed and used by machinists, maintenance technicians, and fabricators working on drill presses and CNC or manual machine tools.

This drill bit is suited for drilling into alloy steel and aluminum in production and repair environments. The screw machine length format is a standard choice for turret lathes, screw machines, and drill presses where a shorter, stiffer bit is required to maintain tight tolerances. The straight cylindrical shank fits standard drill chucks and collet systems without modification. With a right-hand cutting direction, it is compatible with conventional clockwise-rotating spindles found across most shop floor equipment.

Key Features

• 47/64 inch (0.7344 inch) diameter with a diameter tolerance of +0.0000 to -0.0012 inches for consistent hole sizing
• 118-degree standard point angle suitable for general-purpose metal drilling
• High-speed steel construction provides toughness and heat resistance during cutting
• Screw machine (short) length at 5 inches overall improves rigidity and reduces deflection
• Web-thinned tip reduces thrust force required to initiate the cut
• Two-flute spiral design promotes chip clearance in through-hole drilling
• Compliant with ASME B94.11M standards for drill bit geometry and tolerances

Compatibility

Designed as a general-purpose screw machine length drill bit for use in alloy steel and aluminum workpieces. Fits standard straight-shank drill chucks and collets. Part of the CLEVELAND Series 2120 product line.

Installation Notes

This drill bit is intended for use by machinists and qualified maintenance technicians operating drill presses, turret lathes, or screw machines. Always ensure the machine spindle is fully stopped and the chuck is secured before installing or removing the bit. Verify that cutting speed and feed rate are appropriate for the workpiece material to avoid premature wear or bit breakage. Use appropriate cutting fluid when drilling alloy steel to manage heat buildup and extend tool life.