Titan Usa CD50231 Cobalt Jobber Drill Bit No. 31

Product Description

The TITAN USA CD50231 is a cobalt jobber-length drill bit in wire gauge size No. 31, measuring 0.1200 inches in diameter. Built from cobalt steel and finished with an oxide coating, this bit delivers the heat resistance needed to cut stainless steel, superalloys, and titanium without premature edge breakdown. The 135-degree split point starts on contact without a center punch and reduces thrust during entry. With an overall length of 2.75 inches and a 1.625-inch spiral flute, it fits standard drill chucks and drill presses used in metal fabrication, maintenance, and production environments. Machinists and metalworkers are the primary users.

This bit is rated for drilling stainless steel, superalloys, and titanium — materials that generate high heat and work-harden quickly. The cobalt composition and oxide finish help the cutting edge survive these conditions longer than standard high-speed steel alternatives. A regular spiral flute type and straight cylindrical shank make it compatible with conventional three-jaw chucks. The 14xD flute-to-diameter ratio supports efficient chip evacuation in deep-hole drilling applications up to 1.625 inches.

Key Features

• No. 31 wire size, 0.1200-inch diameter with a tight tolerance of -0.0005 to +0.0000 inches
• 135-degree split point for self-centering starts and reduced feed pressure
• Cobalt steel construction with oxide finish for extended performance in hard and abrasive materials
• Right-hand cut, 2-flute regular spiral design for consistent chip removal
• Straight cylindrical shank fits standard chucks without adapters
• Maximum drilling depth of 1.625 inches

Compatibility

Designed for use with stainless steel, superalloys, and titanium workpieces. Fits any drill press, CNC machine, or hand drill with a chuck capable of accepting a 0.1200-inch straight cylindrical shank.

Installation Notes

Secure the shank fully in the chuck jaws before operation. Use cutting fluid or coolant when drilling stainless steel and superalloys to manage heat buildup, even though this bit does not support through-coolant delivery. Apply steady, consistent feed pressure — backing off feed rate can cause work hardening in stainless and titanium. Inspect the cutting edge between uses; cobalt bits can be resharpened when properly equipped.