Value Collection 01378421 Size 42 Cobalt Drill Bit

Product Description

The VALUE COLLECTION 01378421 is a screw machine length cobalt drill bit designed for high-speed drilling in tough and abrasive materials. Built to a wire gauge size of 42, this bit measures 0.0935 inches in diameter with a 1.75 inch overall length and a 0.75 inch flute length. The 135-degree split point geometry reduces walking on entry and requires less feed pressure than a standard 118-degree point. The two-flute regular spiral design promotes efficient chip evacuation. Cobalt construction provides elevated heat resistance compared to standard HSS bits, making it well suited to stainless steel, hardened alloys, and other hard materials common in precision machining and fabrication work.

This bit is sized for light-duty, close-tolerance drilling applications where screw machine length — shorter than jobber length — provides added rigidity and reduced deflection. It is commonly used in drill presses, screw machines, CNC machining centers, and production environments where consistency across multiple holes is critical. The straight shank fits standard chucks without adapters. Machinists, tool-and-die makers, and metalworking fabricators are the primary users of this bit size and geometry.

Key Features

• Wire gauge size 42 (0.0935 inches) for precise, close-tolerance drilling
• 135-degree split point reduces walking and decreases required feed pressure
• Cobalt tool material resists heat buildup in hard and abrasive metals
• Screw machine length (1.75 inch OAL) provides extra rigidity over jobber-length bits
• Two-flute regular spiral promotes clean chip removal
• Right-hand cutting direction, straight shank, no coolant-through required

Compatibility

Designed as an OEM-style replacement or production-use bit for standard straight-shank drill chucks accepting wire gauge tooling in the 0.0000 to 0.1000 inch decimal inch size range.

Installation Notes

Installation is performed by machinists and metalworking professionals. Secure the straight shank fully in the chuck and verify runout before beginning a drilling cycle. Power down or de-energize the machine completely before changing bits. Do not exceed the recommended speed range for cobalt bits in the material being drilled, and ensure the workpiece is properly clamped to prevent movement during the cut.