Cleveland C14278 Screw Machine Drill Bit Wire 38 Cobalt

Product Description

The CLEVELAND C14278 is a screw machine length drill bit designed for high-production drilling in demanding industrial and trade applications. Built from M42 cobalt steel, this bit delivers superior heat and wear resistance compared to standard high-speed steel tooling. The 135-degree split point starts on contact without a center punch and reduces walking on curved or irregular surfaces. With an overall length of 1-13/16 inches and a parabolic flute geometry, the C14278 is engineered for short-reach, high-speed drilling in CNC machines, drill presses, and screw machine setups where rigidity and precision matter.

The C14278 is suited for drilling alloy steel and aluminum in manufacturing, fabrication, and maintenance environments. Its compact screw machine length reduces deflection and improves hole accuracy in tight-clearance applications. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. Machinists, tool and die technicians, and maintenance mechanics commonly use this bit size for tapping prep holes and precision-diameter through-holes in production settings.

Key Features

• M42 cobalt construction rated for heavy-duty drilling in alloy steel and aluminum
• 135-degree split point reduces thrust and eliminates center-punch requirement
• Parabolic flute profile improves chip evacuation at higher feed rates
• Web-thinned parallel web reduces cutting resistance and heat buildup
• Screw machine length at 1-13/16 inches overall provides maximum rigidity and runout control
• Diameter tolerance of plus 0.0000 to minus 0.0005 inches for tight-tolerance hole requirements

Compatibility

Designed as a direct-fit replacement for wire size 38 (0.1015 inches) screw machine length drill bits conforming to ASME B94.11M and ANSI specification designation. Compatible with standard drill chucks and collet systems accepting a 0.1015-inch straight-cylindrical shank.

Installation Notes

Installation of this drill bit should be performed by a qualified machinist or maintenance mechanic with the machine fully de-energized and locked out before bit changes. Seat the straight-cylindrical shank fully in the chuck or collet and verify runout before resuming operations. Use appropriate cutting fluid or coolant when drilling alloy steel to extend tool life, noting that this bit does not feature through-coolant capability. Follow shop safety protocols and applicable OSHA machine-guarding requirements during all drilling operations.