Precision Twist Drill 5999466 Taper Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999466 is a taper shank drill bit built for metal drilling in industrial and shop environments. It carries a 1.0625-inch diameter, a 3MT (Morse Taper 3) shank, and an 11.25-inch overall length, making it suitable for deep-hole work in drill presses and machine tool spindles that accept Morse taper adapters. Manufactured from high speed steel with an oxide finish, it resists heat buildup during extended cutting operations. The 118-degree standard point with web thinning reduces thrust and centers the bit cleanly at entry. A licensed machinist or tool-and-die technician is the typical installer for this class of cutting tool.

This drill bit is designed for general-purpose drilling in steel, cast iron, and similar ferrous materials. The spiral flute geometry promotes chip evacuation during through-hole and blind-hole operations. With a 6.625-inch flute length and a 4xD flute-to-diameter ratio, it handles moderate-depth bores without packing chips in the flutes. It is well suited for production drilling on manual lathes, knee mills, and floor-standing drill presses equipped with a Morse taper spindle or sleeve.

Key Features

• 1.0625-inch diameter with 3MT shank for direct spindle mounting in compatible machines
• 118-degree standard point angle with web thinning for reduced entry thrust
• High speed steel construction for durability in ferrous metal applications
• Oxide finish for mild lubricity and corrosion resistance during storage and use
• 6.625-inch spiral flute length promotes efficient chip clearance
• Right-hand cutting direction, ANSI standard, general-purpose performance rating

Compatibility

Designed for use in drill presses, lathes, and milling machines equipped with a No. 3 Morse Taper spindle or a Morse taper sleeve adapter. Belongs to Precision Twist Drill Series 209.

Installation Notes

Installation is performed by machinists or machine operators familiar with taper shank tooling. Power down and lock out the machine spindle before seating or removing the taper shank. Clean the taper bore and shank with a lint-free cloth before insertion to ensure full contact and prevent the bit from spinning in the socket. Never use a chuck key or wedge on the taper without the spindle fully stopped.