Value Collection 01378439 Size 43 Cobalt Drill Bit

Product Description

The VALUE COLLECTION 01378439 is a screw machine length cobalt drill bit designed for high-speed drilling in tough materials including hardened steels, stainless steel, and heat-resistant alloys. Built to wire gauge size 43, this bit measures 0.0890 inches in diameter with a 1.75-inch overall length and a 0.75-inch flute length. The 135-degree split point reduces walking on entry and requires less thrust than a standard 118-degree point. Cobalt construction provides elevated heat resistance and edge retention under demanding production conditions. This is a heavy-duty bit suited for machine shops, maintenance environments, and production drilling applications.

This drill bit is intended for use in screw machines, drill presses, and hand-held power drills where short, rigid tooling is preferred over jobber-length bits. The reduced length increases stiffness and minimizes deflection in small-diameter drilling, making it well suited for close-tolerance work in metal fabrication and repair. The right-hand cutting direction is standard for conventional drilling equipment. Each package contains one bit, sold in minimum order quantities of 12 units.

Key Features

• Wire gauge size 43 with 0.0890-inch decimal diameter for precise small-hole drilling
• 135-degree split point reduces drill walk and improves entry accuracy on curved or angled surfaces
• Cobalt tool material with straw finish provides superior heat and wear resistance versus standard high-speed steel
• Screw machine (stub) length increases rigidity and reduces deflection in tight setups
• 2-flute regular spiral design promotes efficient chip evacuation in metals
• Heavy-duty grade construction rated for production and high-cycle drilling environments

Compatibility

Designed as a standard straight-shank screw machine length drill bit compatible with conventional drill chucks accepting shanks in the 0.0890-inch diameter range, including bench drill presses, CNC turret machines, and hand-held power drills.

Installation Notes

Installation and use should be performed by machinists or qualified trade personnel familiar with small-diameter tooling. Secure the bit fully in the chuck and verify zero runout before beginning a cut, as small-diameter cobalt bits are brittle and susceptible to breakage from lateral loading. Always reduce spindle speed and increase feed pressure gradually when drilling hardened or work-hardened materials. Inspect the cutting edges before each use and replace the bit at the first sign of chipping or heat discoloration.