Cleveland C14703 Letter V Cobalt Screw Machine Drill Bit

Product Description

The CLEVELAND C14703 is a screw machine length drill bit sized to Letter V (0.3770 inches) and built from M42 cobalt high-speed steel for heavy-duty drilling applications. The 135-degree split point with web thinning reduces thrust on entry and self-centers without a pilot hole, making it well suited for production drilling in tough materials. The straight-cylindrical shank measures 0.3770 inches in diameter and 1.375 inches in length. Overall length is 3.25 inches, keeping the bit rigid and minimizing deflection in short-reach operations. This is a right-hand cut, two-flute design with a regular spiral and parallel web configuration. Licensed HVAC technicians, machinists, pipefitters, and maintenance mechanics reach for cobalt-grade screw machine bits when carbon or standard HSS tooling wears prematurely.

The C14703 is designed for drilling alloy steels and aluminum in environments where heat buildup and work hardening are common concerns. The screw machine length profile — shorter than jobber length — provides added stiffness, making it a practical choice for drill press, CNC turret, or hand-held power tool use in fabrication shops, mechanical contractors, and field service applications. The 135-degree point geometry minimizes walking and produces clean entry holes without center-punching in many setups. This bit is manufactured to ASME B94.11M and DIN 1897 standards, confirming dimensional and performance consistency across production runs.

Key Features

• Letter V size — 0.3770 inches diameter with a tolerance of +0.0000 to -0.0010 inches
• M42 cobalt construction rated for heavy-duty use in alloy steel and aluminum
• 135-degree split point with web thinning reduces entry thrust and self-centers
• Screw machine (stub) length — 3.25 inches OAL — delivers rigidity and reduced deflection
• Right-hand cut, two-flute regular spiral with parallel web configuration
• Conforms to ASME B94.11M and DIN 1897 (ANSI and DIN designations)
• No coolant-through; suitable for dry or externally lubricated cutting

Compatibility

Designed as a direct-fit screw machine length drill bit for any standard straight-shank chuck accepting a 0.3770-inch diameter shank, including drill presses, CNC turrets, and hand-held power tools rated for Letter V tooling.

Installation Notes

This bit is installed by machinists, pipefitters, and mechanical trade professionals using standard three-jaw or keyless chucks. Secure the shank fully into the chuck to the depth of the shank length before applying cutting pressure. For extended tool life in hard alloys, use appropriate cutting fluid or coolant applied externally — this bit does not have a coolant-through channel. Inspect the cutting edges before each use; cobalt bits can micro-chip if run at incorrect speeds or if re-sharpened improperly.