Precision Twist Drill 5999009 Taper Length Drill Bit 15/64

Product Description

The PRECISION TWIST DRILL 5999009 is a taper length high speed steel drill bit designed for precision drilling in non-ferrous and soft metals. Built to ANSI standards, this bit features a 118-degree standard point angle with web thinning for easier penetration and reduced thrust. The cylindrical shank measures 15/64 inch (0.2344 inches) in diameter and the spiral flute geometry promotes efficient chip evacuation during through-hole and deep drilling operations. The bright/uncoated finish makes it easy to inspect for wear. Machinists, tool-and-die workers, and maintenance technicians use this style of bit for general purpose drilling where taper length reach is required beyond what a jobber-length bit provides.

This taper length drill bit is suited for drilling aluminum, aluminum alloy, copper, magnesium, and magnesium alloy. The fast spiral flute design moves chips out of the cut quickly in these gummy, low-abrasion materials. The 6xD flute-length-to-diameter ratio gives extended reach into deeper workpieces while maintaining rigidity. It is appropriate for use in drill presses, CNC machining centers, and hand-held power drills in light industrial, HVAC fabrication, and plumbing rough-in applications where precise hole sizing in soft metal is required.

Key Features

• 118-degree standard point angle with web-thinned tip reduces entry thrust and walking
• Fast spiral flute geometry clears chips efficiently in aluminum, copper, and magnesium alloys
• Taper length body (6xD flute ratio) provides extended reach beyond standard jobber-length bits
• High speed steel construction delivers adequate hardness and toughness for general purpose drilling
• Bright/uncoated finish allows easy visual inspection of cutting edges and flute condition
• Right-hand cut with cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general purpose taper length drill bit in the R51FS series, compatible with standard drill chucks accepting a 15/64-inch (0.2344-inch) cylindrical shank. Suited for drilling aluminum, aluminum alloy, copper, magnesium, and magnesium alloy workpieces as specified by the manufacturer.

Installation Notes

Secure the cylindrical shank fully in the drill chuck and verify concentricity before starting the cut. Use appropriate cutting fluid or lubricant for copper and aluminum alloys to extend edge life and improve hole finish. Ensure the workpiece is clamped securely to prevent rotation on breakthrough. Inspect cutting edges and flute condition regularly and replace the bit if chipping or excessive wear is observed.