Precision Twist Drill 5999968 Reduced Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999968 is a reduced shank twist drill bit designed for general-purpose drilling in ferrous metals and a range of non-ferrous materials. It carries a 25/32 inch (0.7812 inch decimal) cutting diameter with a 1/2 inch straight-cylindrical shank, allowing it to run in standard 1/2 inch chuck capacity drill presses and hand drills without requiring a larger chuck. The 118-degree standard point angle suits common workshop and jobsite drilling applications. The bit is manufactured from high-speed steel with a bright, uncoated finish. Licensed HVAC, plumbing, and electrical trades use reduced shank bits like this when drilling through sheet metal, pipe straps, structural steel, and equipment panels.

The 5999968 fits into Series R56 from PRECISION TWIST DRILL and is suited for drilling ferrous metals as the primary workpiece material. Secondary compatible materials include aluminum, copper, magnesium, nickel, titanium, synthetic composites, and cermet. With a 3 inch flute length and 6 inch overall length, it reaches into recessed locations common in mechanical room installations and equipment cabinets. The right-hand spiral flute geometry evacuates chips efficiently during through-drilling operations. No coolant is required for standard use, making it practical for field and shop work.

Key Features

• Reduced 1/2 inch shank fits standard 1/2 inch chucks despite the larger 25/32 inch cutting diameter
• 118-degree standard point angle for general-purpose drilling in ferrous and non-ferrous metals
• High-speed steel construction provides durability across a wide range of workpiece materials
• Right-hand cut with regular spiral flute for efficient chip evacuation
• Bright, uncoated finish — no coating delamination risk during resharpening
• 6 inch overall length with 3 inch flute depth reaches into confined spaces

Compatibility

Designed as a general-purpose reduced shank drill bit compatible with any 1/2 inch chuck drill press, magnetic drill, or hand drill. Suitable for drilling ferrous metals, aluminum, copper, magnesium, nickel, titanium, synthetic materials, and cermet per Series R56 design specifications.

Installation Notes

Secure the shank fully into the chuck and verify the bit runs true before drilling. Power down and lock out the drill press or tool before changing bits. Follow applicable ANSI safety standards for rotating cutting tools. Wear appropriate eye protection; chip ejection from spiral flutes at drilling depth is expected with this geometry.