Value Collection 01198316 Cobalt Jobber Drill Bit No. 31

Product Description

The VALUE COLLECTION 01198316 is a cobalt jobber-length drill bit sized to wire gauge No. 31 (0.1200 inches decimal). Built for heavy-duty drilling applications, the bit features a 135-degree split point that reduces walking and requires no center punch on most workpieces. The regular spiral flute and right-hand cutting direction are standard for general-purpose drilling, while the cobalt construction gives the bit the heat resistance needed to cut through tough, work-hardening materials. Overall length is 2.75 inches with a 1.625-inch flute length. Machinists, maintenance technicians, and fabricators working with hardened or abrasive stock reach for cobalt-grade tooling like this when high-speed steel would overheat and dull prematurely.

This bit is suited for drilling stainless steel, hardened materials, and other high-strength alloys where tool life and edge retention are critical. The straight cylindrical shank accepts standard drill chucks on handheld drills, drill presses, and CNC machining centers. The 0.1200-inch shank diameter matches the cutting diameter, making chuck runout straightforward to minimize. Applications include tapping prep, hole sizing for fasteners, and general metalworking in fabrication shops, maintenance facilities, and production environments.

Key Features

• Cobalt construction provides superior heat resistance for drilling stainless steel and hardened materials
• 135-degree split point reduces thrust force and minimizes bit walking without a center punch
• Wire gauge No. 31 size — 0.1200 inches decimal — for precise hole sizing
• Regular spiral, right-hand flute geometry for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without an adapter
• Heavy-duty grade construction rated for demanding production and maintenance use

Compatibility

Designed as a standard jobber-length drill bit compatible with any drill press, hand drill, or machining center chuck that accepts a 0.1200-inch straight shank. Primary workpiece materials include stainless steel and hardened materials as specified by the manufacturer.

Installation Notes

Secure the shank fully in the chuck and verify runout before drilling. Use appropriate cutting fluid or coolant when drilling stainless steel or hardened alloys to extend tool life and prevent work hardening at the hole edge. Reduce feed pressure as the bit breaks through the workpiece to avoid grabbing or bit breakage. This tooling should be installed and operated by personnel familiar with machine shop safety practices and applicable workplace standards.