Precision Twist Drill 5999471 Taper Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999471 is a taper shank drill bit engineered for heavy-duty drilling in metal, steel, and other ferrous materials. Built from high speed steel with an oxide finish, it delivers consistent performance in general-purpose production and maintenance applications. The bit features a 1.125-inch diameter, a 118-degree standard point angle, and a web-thinned tip that reduces thrust and improves penetration. At 12.75 inches overall length with a 7.125-inch spiral flute, it is sized for deep-hole work in drill press and lathe setups where rigidity and accuracy matter.

This drill bit is intended for use in machine shop, fabrication, and industrial maintenance environments. The 4MT (Morse Taper 4) shank seats directly into compatible taper-socket spindles on drill presses, lathes, and radial arm drills, eliminating the need for a separate chuck. Right-hand cutting direction and regular spiral flute geometry suit through-hole and flat-bottom drilling operations in general-purpose metalworking. It meets ANSI standards and is cataloged under Series 209.

Key Features

• 1.125-inch diameter with web-thinned 118-degree standard point for reduced entry thrust
• 4MT Morse Taper shank for direct spindle mounting without a chuck
• High speed steel construction with oxide finish for lubricity and corrosion resistance
• 12.75-inch overall length with 7.125-inch spiral flute for deep-reach applications
• Right-hand, regular spiral flute geometry for efficient chip evacuation
• ANSI-compliant, Series 209 general-purpose performance rating

Compatibility

Designed for use in drill press spindles, lathes, and radial arm drills equipped with a No. 4 Morse Taper socket. Meets ANSI standards for taper shank drill bits.

Installation Notes

Installation is performed by a machinist or tool-and-die technician. Power down and lock out the machine before seating or removing the taper shank. Clean the taper socket and shank mating surfaces thoroughly before insertion to ensure full contact and prevent slippage. Use a drift key and hammer against the spindle knockout slot for removal — do not apply lateral force to the drill body.