Precision Twist Drill 5999161 Wire 66 Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5999161 is a jobber-length drill bit sized to wire gauge 66, equivalent to 0.0330 inches in decimal, designed for general-purpose drilling in metalworking applications. Manufactured from high speed steel with a steam oxide coating, this bit runs a standard 118-degree point angle with a right-hand spiral flute and a web-thinned tip geometry for reduced thrust and cleaner entry. The overall length is 1.375 inches with a 0.500-inch flute length. It is installed and used by machinists, toolroom technicians, and maintenance trades requiring precision small-diameter hole work in production or repair settings.

This drill bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The steam oxide finish provides light corrosion resistance and reduces chip welding during cutting. The straight-cylindrical shank seats directly into standard drill chucks and collets without adapters, making it practical for benchtop drill presses, CNC machining centers, and hand-held drilling operations where a small-diameter wire-gauge bit is required. It is a single-pack item sold as part of the R18 series of jobber-length bits.

Key Features

• Wire gauge size 66 with 0.0330-inch decimal diameter for tight-tolerance small-bore work
• High speed steel construction for durability across ferrous and non-ferrous workpieces
• Steam oxide coating reduces friction and light surface corrosion
• 118-degree standard point angle with web-thinned tip reduces entry thrust
• Regular spiral flute with tapered web for efficient chip evacuation
• Straight-cylindrical shank fits standard chucks and collets without adapters

Compatibility

Designed as an OEM-style general-purpose jobber-length drill bit for use in standard drill chucks and collets accepting a 0.0330-inch straight-cylindrical shank across benchtop, floor-standing, and CNC drilling equipment.

Installation Notes

Installation is performed by machinists and maintenance technicians familiar with small-diameter drill bit handling. Secure the shank fully in the chuck or collet before operation and verify runout before cutting. Use appropriate cutting fluid for harder workpieces such as stainless steel or titanium to extend tool life. Small-diameter bits are sensitive to side load — feed pressure should be controlled and consistent to avoid breakage.