Cleveland C14729 Screw Machine Drill Bit 31/64 in Cobalt

Product Description

The CLEVELAND C14729 is a screw machine length cobalt drill bit designed for high-performance drilling in tough materials. Built to M42 cobalt steel grade standards, this bit delivers the heat and wear resistance needed when drilling alloy steels, stainless, and aluminum. The 135-degree split point reduces walking and lowers thrust requirements, making it well-suited for production drilling where accuracy and tool life matter. A parallel web configuration with web thinning improves chip evacuation and reduces torque at the cutting edge. At 3-11/16 inches overall length, the stub-body screw machine format provides extra rigidity compared to jobber-length bits, reducing deflection in short-reach applications.

This drill bit is used in machining, fabrication, and maintenance applications where a compact, rigid cutting tool is required. The screw machine length format is common in drill press and CNC operations where workholding clearance is limited and hole-position accuracy is critical. It is appropriate for use on alloy steel, aluminum, and similar workpiece materials requiring a heavy-duty cobalt bit. Licensed machinists, tool-and-die technicians, and maintenance mechanics typically select this format for repetitive production or repair drilling tasks.

Key Features

• M42 cobalt steel construction for extended tool life in hard and abrasive materials
• 135-degree split point reduces drill walking and lowers axial thrust
• Web-thinned parallel web improves chip flow and reduces torque demand
• Screw machine length body provides greater rigidity and reduced deflection versus jobber-length bits
• Right-hand cut, straight cylindrical shank fits standard drill chucks and collets
• Meets ASME B94.11M and DIN 1897 dimensional standards

Compatibility

Designed as a heavy-duty OEM-style drill bit for use in standard drill chucks and collets accepting a 0.4844-inch straight cylindrical shank, suitable for drill presses, CNC machining centers, and hand-held drilling equipment.

Installation Notes

This bit should be installed in a properly sized chuck or collet and secured firmly before use. Ensure the drilling machine is powered down and locked out before changing tooling. Use appropriate cutting fluid for the workpiece material to maximize tool life and surface finish. Inspect the cutting edges for wear or chipping before each use, and replace the bit if the point geometry is compromised.