Cleveland C04434 Screw Machine Drill Bit No. 29 Hss

Product Description

The CLEVELAND C04434 is a screw machine length (stub length) drill bit sized to wire gauge No. 29, with a decimal diameter of 0.1360 inches. Built from high-speed steel with a bright, uncoated finish, it features a 118-degree standard point angle and a two-flute right-hand spiral design. The shortened overall length of 1-15/16 inches gives it greater rigidity than jobber-length bits, reducing deflection and chatter in production drilling operations. Web-thinned geometry lowers thrust requirements at the point. This bit is used by machinists, tool-and-die professionals, and production floor technicians working in metal fabrication environments.

The C04434 is suited for general-purpose drilling in alloy steel and aluminum on drill presses, CNC machining centers, turret lathes, and hand-held power tools where short-length rigidity is an advantage. The straight-cylindrical shank with a diameter of 0.1360 inches fits standard collets and drill chucks without modification. Its Series 2120 designation places it within a recognized general-purpose HSS stub drill family. Typical applications include tapping pilot holes, clearance holes, and through-hole production work in light to medium alloy and aluminum stock.

Key Features

• Wire gauge No. 29 sizing at 0.1360 inches decimal diameter with a tight tolerance of +0.0000 to -0.0007 inches
• Screw machine (stub) length at 1-15/16 inches overall for increased rigidity and reduced deflection
• 118-degree standard point angle with web-thinned, parallel-web configuration for lower entry thrust
• High-speed steel construction for general-purpose metal cutting in alloy and aluminum workpieces
• Right-hand cut, two-flute regular spiral with straight-cylindrical shank for universal chuck compatibility
• Meets ASME B94.11M standards for drill bit geometry and dimensional accuracy

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill chucks and collets accepting a 0.1360-inch straight-cylindrical shank. Suitable for drill presses, machining centers, and hand-held power tools used in metal fabrication on alloy steel and aluminum workpieces.

Installation Notes

This bit is installed by machinists and production technicians. Secure the shank fully in the chuck or collet before operation and verify concentricity to avoid runout at small diameters. Ensure the workpiece is properly clamped before drilling. Use cutting fluid appropriate for the workpiece material to extend tool life, particularly when drilling alloy steel.