Cleveland C04582 Screw Machine Drill Bit Letter X Hss

Product Description

The CLEVELAND C04582 is a screw machine length drill bit sized to Letter X (0.3970 inches) with a 118-degree standard point angle and a bright, uncoated high-speed steel construction. Screw machine length bits are shorter than jobber-length drills, providing increased rigidity and reduced deflection when drilling in confined spaces or on automatic screw machines and drill presses. The right-hand spiral flutes with web-thinned geometry reduce thrust and improve chip evacuation. This bit is a general-purpose tool suited for machinists, maintenance technicians, and metalworking fabricators who need consistent, repeatable hole sizing in alloy steels and aluminum.

The C04582 is intended for use on automatic screw machines, CNC lathes, drill presses, and hand-held power drills in production and job-shop environments. Its short overall length of 3-5/16 inches and 1-15/16-inch flute length make it well-suited for shallow-to-medium-depth holes where a standard jobber bit would introduce chatter or runout. Primary workpiece materials include alloy steel and aluminum, making it appropriate for general metalworking, light fabrication, and maintenance applications across industrial and commercial settings.

Key Features

• Letter X size at 0.3970 inches with a tight diameter tolerance of +0.0000 to -0.0010 inches for close-tolerance drilling
• 118-degree standard point angle with web-thinned, parallel-web geometry for reduced thrust and cleaner entry
• High-speed steel construction with bright, uncoated finish suitable for alloy steel and aluminum
• Short screw machine length overall at 3-5/16 inches for increased rigidity and reduced deflection
• 2-flute regular spiral design promotes efficient chip clearance during drilling
• Straight-cylindrical shank at 0.3970 inches diameter fits standard drill chucks without adapters
• Meets ASME B94.11M dimensional standards for consistent interchangeability

Compatibility

Designed as an OEM-style general-purpose screw machine length drill bit for use in standard drill chucks accepting a straight-cylindrical shank at 0.3970 inches diameter.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with metalworking operations. Secure the workpiece and verify spindle speed and feed rate are appropriate for the workpiece material before drilling. Inspect the bit for wear or chipping before each use; a dull or damaged cutting edge increases thrust and can cause workpiece damage or bit breakage. No coolant-through capability is present on this bit, so apply cutting fluid externally when drilling tougher alloy steels to extend tool life.