Precision Twist Drill 5996106 Cobalt Drill Bit 0.081 in

Product Description

The PRECISION TWIST DRILL 5996106 is a screw machine length cobalt drill bit engineered for drilling hard and tough materials where standard high-speed steel bits fall short. Sized at 0.081 inches (Wire Size 46), this bit features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The cobalt M41 grade construction delivers elevated heat resistance and edge retention during high-feed or dry drilling operations. Right-hand spiral flutes with a 2.5xD flute-to-diameter ratio evacuate chips efficiently. The straight-cylindrical shank seats securely in standard drill chucks. This bit is sold individually but carries a minimum order quantity of 12 units.

This bit is designed for use in screw machine and production drilling environments where compact overall length improves rigidity and reduces deflection. The shortened 1.75-inch overall length and 0.75-inch flute length make it well-suited for CNC machining centers, drill presses, and hand drills operating in confined setups or on hard ferrous metals, stainless steels, and other difficult workpiece materials. Machinists, tool-and-die professionals, and industrial maintenance technicians are the primary installers.

Key Features

• Cobalt M41 grade steel for superior heat and wear resistance in hard material drilling
• 135-degree split point reduces thrust force and eliminates center-punching on most surfaces
• Web-thinned, tapered web design improves chip clearance and reduces torque requirements
• Screw machine length (1.75 inches overall, 0.75-inch flute) provides increased rigidity over jobber-length bits
• Right-hand cut with regular spiral flutes for standard clockwise drilling applications
• Meets ANSI standards; rated for heavy-duty high-performance use

Compatibility

Designed as a screw machine length replacement or production-quantity drill bit for use with standard straight-shank drill chucks on CNC machines, drill presses, and hand drills when drilling hard materials including ferrous metals and stainless steel.

Installation Notes

Installation and use should follow standard machine shop safety practices. Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck key removal. When drilling hard materials, use appropriate cutting fluid or coolant unless running dry by design. Inspect the cutting edges before each use and replace bits showing chipping or dulling to prevent workpiece damage or bit breakage.