Precision Twist Drill 5999847 Reduced Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999847 is a reduced shank twist drill bit designed for drilling into ferrous metals and a broad range of secondary materials. It features a 1-1/32 inch (1.0312 inch decimal) cutting diameter paired with a 1/2 inch straight-cylindrical reduced shank, making it compatible with standard 1/2 inch drill chucks without requiring a larger chuck capacity. The 118-degree standard point angle suits general-purpose drilling in production and maintenance environments. The high speed steel construction provides adequate hardness and wear resistance for everyday metal drilling tasks. This bit is part of the Series R56 line and carries a bright, uncoated finish.

This drill bit is suited for machinists, maintenance technicians, fabricators, and tool-room professionals who need to bore larger-diameter holes using existing 1/2 inch chuck equipment. The reduced shank design eliminates the need for a larger drill press or milling machine spindle. Typical applications include drilling through steel plate, structural shapes, aluminum stock, copper, and similar materials in light industrial, HVAC fabrication, plumbing rough-in, and general metalworking settings. Right-hand cut and spiral flute geometry clear chips efficiently during through-hole operations.

Key Features

• Reduced shank design allows 1-1/32 inch cutting diameter to run in a standard 1/2 inch chuck
• 118-degree standard point angle for general-purpose entry and centering on ferrous and non-ferrous metals
• High speed steel construction provides hardness suitable for production drilling without coolant
• 3 inch flute length supports drilling to a maximum depth of 3 inches per pass
• Bright, uncoated finish — no coating degradation concerns, easy to inspect for wear
• Right-hand spiral flute promotes efficient chip evacuation during through-hole drilling

Compatibility

Designed for use in 1/2 inch keyed or keyless drill chucks on drill presses, hand drills, and milling machines. Rated for primary use in ferrous metal workpieces; secondary compatible materials include aluminum, copper, magnesium, nickel, titanium, cermet, and synthetic materials per ANSI standards.

Installation Notes

Installation of this bit is performed by machinists and maintenance technicians familiar with drill press and hand-drill operation. Secure the reduced shank fully within the chuck jaws and tighten firmly before operation to prevent slippage under torque. Ensure the workpiece is clamped or fixtured — never hand-hold material when drilling with large-diameter bits. No coolant is required per the rated specifications, but chip clearance should be managed with periodic retraction on deep holes.