Precision Twist Drill 5999536 Reduced Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999536 is a reduced shank twist drill bit engineered for general-purpose drilling in metal fabrication, maintenance, and industrial applications. The bit measures 9/16 inch (0.5625 inch) in diameter with a 1/2 inch straight-cylindrical shank, allowing it to seat in standard 1/2 inch drill chucks without requiring a larger chuck capacity. Constructed from high speed steel (HSS) with a bright, uncoated finish, it delivers reliable performance across a range of ferrous and non-ferrous materials. The 118-degree standard point angle provides a versatile cutting geometry suited to everyday drilling tasks.

This drill bit is designed for use in hand-held power drills, drill presses, and milling setups where a reduced shank profile is required to match available toolholding. The 6 inch overall length and 3 inch flute length accommodate moderate drilling depths in production and maintenance environments. It is well suited for machinists, millwrights, and general fabricators working with ferrous metals, aluminum, copper, nickel, titanium, magnesium, and synthetic materials. Right-hand spiral flutes with a regular helix handle chip evacuation under standard cutting conditions.

Key Features

• Reduced shank design: 9/16 inch cutting diameter with a 1/2 inch shank for compatibility with standard 1/2 inch chucks
• High speed steel construction for durability in ferrous and non-ferrous metal drilling
• 118-degree standard point angle for general-purpose versatility
• Right-hand, regular spiral flutes for efficient chip clearance
• Bright/uncoated finish — no coating degradation to monitor during regrinding
• Series R56, ANSI standards compliant

Compatibility

Designed as a general-purpose reduced shank drill bit suitable for use in any 1/2 inch drill chuck. Rated for ferrous metals as the primary workpiece material, with secondary compatibility across aluminum, copper, magnesium, nickel, titanium, cermet, and synthetic materials per Series R56 specifications.

Installation Notes

Install and secure the 1/2 inch shank fully into the drill chuck before operation. Power down and de-energize any drill press or machine tool before changing bits. Ensure the chuck is tightened with a chuck key on all three jaws where applicable. Observe applicable ANSI B11 machine tool safety standards and shop PPE requirements when drilling metal.