Precision Twist Drill 5999469 Taper Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999469 is a taper shank drill bit designed for heavy-duty drilling in metal, structural steel, and industrial workpieces. Built from high speed steel with an oxide finish, it delivers consistent performance in general-purpose drilling applications. The bit features a 118-degree standard point angle with web thinning for improved penetration and reduced thrust. At 1.25 inches in diameter and 13.5 inches overall length, this is a large-format bit intended for use in drill presses, lathes, and Morse taper-equipped machine tool spindles. Right-hand spiral flutes clear chips efficiently during deep-hole operations.

This bit is suited for machine shop, fabrication, and industrial maintenance environments where a 4MT taper shank interface is required. The 4 Morse Taper shank seats directly into compatible drill press quills, lathe tailstocks, and milling machine spindles without a separate chuck. With a flute length of 7.875 inches and a 4xD flute-to-diameter ratio, it handles moderate-depth bores in ferrous and non-ferrous materials. Machinists, tool-and-die workers, and industrial maintenance technicians are the primary installers of this type of tooling.

Key Features

• 1.25-inch diameter high speed steel construction for durability in ferrous and non-ferrous materials
• 4 Morse Taper shank for direct mounting in compatible machine spindles and tailstocks
• 118-degree standard point angle with web thinning for reduced entry thrust
• Oxide finish for mild corrosion resistance and heat reduction during cutting
• 7.875-inch spiral flute length with regular right-hand spiral for effective chip evacuation
• Meets ANSI standards for dimensional consistency and interchangeability

Compatibility

Designed for use in drill presses, lathe tailstocks, and machine tool spindles equipped with a 4 Morse Taper socket. Conforms to ANSI standards for taper shank drill bits.

Installation Notes

Installation is performed by qualified machinists or tool-and-die technicians. Power down and lock out the machine before inserting or removing the taper shank. Clean the taper bore and shank mating surfaces before seating to ensure full contact and prevent runout. Use a drift key through the spindle slot to remove the bit safely — never strike the spindle body directly.