Precision Twist Drill 5996057 Cobalt Drill Bit 0.111 in

Product Description

The PRECISION TWIST DRILL 5996057 is a screw machine length cobalt drill bit designed for drilling into hard and tough materials in high-demand production environments. Measuring 0.111 inches (wire size 34) in diameter with an overall length of 1-7/8 inches and a flute length of 7/8 inch, this bit fits compact drilling applications where standard-length bits are impractical. The 135-degree split point reduces walking and allows clean entry without a center punch. Built from M41 cobalt high-speed steel, the bit handles elevated cutting temperatures better than standard HSS, making it a go-to choice for machinists and tool-room technicians working with stainless steel, hard alloys, and similar materials.

This drill bit is suited for screw machine operations, CNC drilling setups, and bench drill press work where short-length rigidity is required. The straight-cylindrical shank seats securely in standard chucks without slipping under torque. Its 2.5xD flute-to-diameter ratio and regular spiral geometry provide efficient chip evacuation in blind and through-hole applications. Technicians working in metal fabrication, aerospace component work, or precision machining will find this bit appropriate for repetitive high-cycle drilling in hard material stock.

Key Features

• M41 cobalt HSS construction for high-heat resistance in hard material drilling
• 135-degree split point for self-centering entry and reduced thrust
• Web-thinned, tapered web configuration for improved cutting efficiency
• Screw machine length (1-7/8 inches overall) for added rigidity in tight setups
• Right-hand cut with regular spiral flute for consistent chip removal
• Coolant-through: No — compatible with standard external coolant application
• Meets ANSI standards for dimensional accuracy and performance

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit compatible with standard straight-shank chucks on drill presses, CNC machining centers, and screw machines accepting 0.111-inch diameter tooling.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling technicians familiar with metal-cutting operations. Ensure the drill press or machining center spindle is fully stopped before inserting or removing the bit from the chuck. Secure the straight-cylindrical shank firmly in the chuck to prevent slippage under cutting load. Apply appropriate cutting fluid or external coolant to extend bit life and maintain hole quality when drilling hard materials.