Precision Twist Drill 5999864 Reduced Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999864 is a reduced shank twist drill bit designed for general-purpose hole-making in metal and other materials. It features a 1-11/32 inch (1.3438 inch decimal) cutting diameter paired with a 1/2 inch straight-cylindrical shank, allowing it to chuck into standard 1/2 inch drill chucks despite its larger cutting diameter. The bit is manufactured from high speed steel (HSS) with a bright uncoated finish and ground to a 118-degree standard point angle. Overall length is 6 inches with a 3-inch flute length, giving a maximum drilling depth of 3 inches. It is part of the Series R56 line and is suited for right-hand cutting with a regular spiral flute.

This drill bit is intended for drilling ferrous metals including steel and iron, and is also rated for use in aluminum, copper, magnesium, nickel, titanium, cermet, and synthetic materials. The reduced shank design makes it practical for machinists, maintenance technicians, pipefitters, and general metal fabricators who need a larger-diameter hole without requiring a larger drill chuck. It is suited for both shop and field use in light to medium production drilling applications.

Key Features

• 1-11/32 inch cutting diameter with 1/2 inch reduced straight-cylindrical shank for use in standard 1/2 inch chucks
• 118-degree standard point angle for general-purpose entry into ferrous and non-ferrous metals
• High speed steel construction for durability across a broad range of workpiece materials
• Bright uncoated finish — no coating to chip or peel during regrinding
• 3-inch flute length supports up to 3 inches of drilling depth
• Right-hand cut with regular spiral flute for consistent chip evacuation
• Meets ANSI standards; Series R56

Compatibility

Designed for use in any drill press, milling machine, or hand drill with a 1/2 inch chuck capacity. Compatible with ferrous metal, aluminum, copper, magnesium, nickel, titanium, cermet, and synthetic workpiece materials per manufacturer specifications.

Installation Notes

Install into a 1/2 inch drill chuck and tighten securely before operation. Ensure the workpiece is clamped or fixtured to prevent rotation during drilling. Cutting fluid or coolant is not required per manufacturer specs but may extend bit life when drilling harder ferrous materials at sustained depths. Regrinding to the original 118-degree point angle can restore cutting performance when the tip shows wear.