Precision Twist Drill 5999527 Reduced Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999527 is a reduced shank twist drill bit designed for general-purpose metal drilling in professional trade and industrial applications. The bit measures 45/64 inches (0.7031 inches decimal) in cutting diameter with a 1/2-inch straight-cylindrical shank, allowing it to seat in standard half-inch chucks even though the cutting diameter is larger. Overall length is 6 inches with a 3-inch flute length. Constructed from high speed steel with a bright, uncoated finish, this is a right-hand cut bit built for reliable performance across ferrous and non-ferrous materials.

This bit is suited for drilling ferrous metals, aluminum, copper, magnesium, nickel, titanium, and synthetic materials in fabrication, maintenance, and mechanical service environments. The reduced shank design makes it practical for use with standard drill presses and hand drills equipped with 1/2-inch chucks where a full-shank bit of this diameter would require a larger machine spindle. It carries the Series R56 designation and meets ANSI standards. Machinists, millwrights, pipefitters, and general maintenance technicians will find this bit a straightforward fit for everyday hole-making tasks.

Key Features

• 45/64-inch (0.7031-inch) cutting diameter with 1/2-inch reduced shank for use in standard chucks
• High speed steel construction for durability across a range of workpiece materials
• 118-degree standard point angle for general-purpose drilling with minimal walking
• 3-inch flute length supports drilling depths up to 3 inches
• Bright, uncoated finish — no coating buildup to affect tolerances
• Right-hand cut, regular spiral flute for efficient chip evacuation
• ANSI-compliant, Series R56

Compatibility

Designed as a general-purpose reduced shank drill bit compatible with standard 1/2-inch drill chucks on drill presses and hand drills. Suitable for ferrous metals, aluminum, copper, magnesium, nickel, titanium, and synthetic materials per Series R56 specifications.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with drill press or hand drill operation. Secure the workpiece firmly before drilling and verify the chuck is properly tightened on the shank before starting the machine. Follow applicable shop safety practices including eye protection and appropriate cutting speeds for the workpiece material. No coolant is required per the bit specification, but appropriate speeds and feeds for the material should be observed to prevent premature tool wear.