Cleveland C14642 Cobalt Screw Machine Drill Bit Letter C

Product Description

The CLEVELAND C14642 is a cobalt screw machine length drill bit sized at Letter C (0.2420 inches) with a 135-degree split point and web-thinned geometry. Built to M42 cobalt steel grade, it handles demanding applications where standard high-speed steel bits fall short. The 135-degree split point reduces walking and cutting pressure, making it well suited for harder or tougher workpiece materials. It features a straight cylindrical shank, right-hand cut, and two spiral flutes with a parallel web configuration. Overall length is 2.5 inches. This bit is sold individually and is intended for use by machinists, tool and die technicians, and maintenance professionals who require consistent, repeatable hole quality.

The C14642 is designed for drilling into alloy steels and aluminum in production and maintenance environments. Its screw machine length — shorter than a jobber-length bit — increases rigidity and reduces deflection, which is critical when working in drill presses, CNC machining centers, or turret lathes where stub-length tooling is standard. The bit conforms to ASME B94.11M and DIN 1897 specifications, making it appropriate for shops that operate to ANSI or DIN standards. Diameter tolerance is held to plus 0.0000 and minus 0.0007 inches, supporting close-tolerance work on alloy and aluminum workpieces.

Key Features

• M42 cobalt construction for heat and wear resistance in hard-material drilling
• 135-degree split point with web thinning reduces thrust and prevents bit walking
• Screw machine (stub) length at 2.5 inches overall for maximum rigidity and reduced deflection
• Straight cylindrical shank at 0.2420 inches diameter fits standard drill chucks and collets
• Right-hand cut, two spiral flutes, parallel web — compatible with conventional drilling setups
• Meets ASME B94.11M and DIN 1897 standards; diameter tolerance held to plus 0.0000 / minus 0.0007 inches

Compatibility

Designed as a heavy-duty OEM-style replacement or production drill bit for use in drill presses, CNC machining centers, and turret lathes that accept straight cylindrical shank tooling in the Letter C (0.2420 inch) size range. Rated for alloy steel and aluminum workpiece materials per Series 2133 specifications.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with rotating cutting tool safety. Secure the shank fully in the chuck or collet before operation and confirm runout is within acceptable limits. Reduce spindle speed and feed rate when transitioning between workpiece materials, and use appropriate cutting fluid for alloy steel applications. Inspect the cutting edge and point geometry before each use — cobalt bits can chip if subjected to side loading or excessive feed pressure.