Value Collection 01378314 Size 31 Cobalt Drill Bit

Product Description

The VALUE COLLECTION 01378314 is a screw machine length cobalt drill bit designed for high-speed, close-tolerance drilling in metal fabrication and machine shop environments. Sized at wire gauge 31, equivalent to 0.1200 inch decimal, it features a 135-degree split point for fast self-centering starts with reduced walking and less feed pressure required. The cobalt construction provides heat resistance beyond standard high-speed steel, making it well suited for drilling stainless steel, hardened alloys, and other tough ferrous materials. With a straight shank and overall length of 1-7/8 inches, this bit fits standard drill chucks and machine tool holders without modification.

This drill bit is intended for use in production drilling, CNC drill press operations, and bench machining where short overall length improves rigidity and reduces deflection. The screw machine length format is preferred over jobber length in tight-clearance fixtures and turret setups. It is appropriate for use on steel, cast iron, stainless, and similarly hard materials where cobalt grade tooling is specified. Licensed machinists, tool-and-die makers, and maintenance mechanics typically select this bit when standard high-speed steel tooling fails prematurely due to heat buildup.

Key Features

• Wire gauge size 31, 0.1200 inch decimal diameter for precise hole sizing
• 135-degree split point reduces walking and lowers required feed pressure
• Cobalt tool material resists heat buildup when drilling hard ferrous alloys
• Screw machine length at 1-7/8 inches OAL improves rigidity in tight setups
• 7/8 inch flute length with regular spiral for efficient chip evacuation
• Straight shank fits standard drill chucks and machine tool collets

Compatibility

Designed as a replacement or production-stock drill bit for applications requiring wire gauge size 31 within the 0.1000 to 0.1500 inch decimal range, compatible with any standard straight-shank drill chuck accepting 0.1200 inch shanks.

Installation Notes

Install securely in a properly sized drill chuck or collet before operation and verify shank seating. Disconnect or de-energize the drill press or CNC machine before changing tooling. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole finish. Inspect the split point for chipping before each use, particularly when drilling hardened alloys.