Cleveland C14644 Screw Machine Drill Bit Letter D Cobalt

Product Description

The CLEVELAND C14644 is a screw machine length drill bit designed for high-productivity drilling in tight spaces and short-reach applications. Manufactured from M42 cobalt steel, it holds up under the heat generated when cutting alloy steels, aluminum, and other demanding workpiece materials. The 135-degree split point reduces thrust and self-centers on contact, eliminating the need for a center punch in most setups. At 2.5 inches overall length, this is a stub-length bit built for rigidity and reduced deflection. It is installed and used by machinists, tool-and-die workers, and maintenance mechanics working on manual and CNC drilling equipment.

The C14644 fits standard drill chucks and collets that accept a 0.2460-inch straight cylindrical shank. Its screw machine length profile makes it well suited for drill press work, turret lathe operations, and CNC machining centers where spindle clearance is limited. The 1-3/8-inch flute length and 1-1/8-inch shank length are sized to handle the material removal demands of production runs in alloy and aluminum stock. The right-hand spiral flute configuration evacuates chips efficiently during through-hole and blind-hole drilling.

Key Features

• M42 cobalt construction for heat resistance in alloy and aluminum drilling
• 135-degree split point for reduced thrust and self-centering entry
• Web-thinned, parallel web design improves chip clearance and cutting efficiency
• Screw machine (stub) length at 2.5 inches overall for maximum rigidity
• Right-hand cut with regular spiral fluting for efficient chip evacuation
• Meets ASME B94.11M and DIN 1897 dimensional standards
• Diameter tolerance held to +0.0000 to -0.0007 inches for consistent hole quality

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for standard drill chucks and collets accepting a 0.2460-inch straight cylindrical shank, suitable for use in hand drills, drill presses, turret lathes, and CNC machining centers.

Installation Notes

Installation is performed by machinists and maintenance mechanics using standard drill chuck or collet tooling. Secure the shank fully in the chuck and verify concentricity before operation. Always wear appropriate eye protection and follow shop-floor safety protocols when operating drilling equipment. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting this bit does not support internal coolant-through delivery.