Precision Twist Drill 5999506 Taper Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999506 is a taper shank drill bit designed for heavy-duty drilling in metal and industrial materials. Built from high speed steel with an oxide finish, this bit measures 1.0469 inches (1-3/64 inches) in diameter with a 3MT (Morse Taper 3) shank for secure chuck engagement on drill presses and lathes. The 118-degree standard point with web thinning reduces thrust and helps center the bit on entry. At 11.25 inches overall length with a 6.625-inch spiral flute, it handles deep-hole applications where rigidity and chip evacuation are critical. Cutting direction is right hand with a regular spiral. This is a general-purpose bit conforming to ANSI standards.

This bit is suited for machine shop, maintenance, and fabrication environments where large-diameter holes are required in ferrous and non-ferrous metals. The 3MT taper shank seats directly into compatible spindles on drill presses, milling machines, and lathes without a chuck, providing maximum rigidity and concentricity. It is appropriate for production and repair drilling where controlled feed rates and coolant-free operation are standard. Machinists, millwrights, and industrial maintenance technicians are the typical end users.

Key Features

• 1.0469 inches (1-3/64 inches) diameter for large-bore drilling applications
• 3MT Morse Taper shank seats directly into compatible machine spindles
• High speed steel construction with oxide finish for wear and corrosion resistance
• 118-degree standard point with web thinning to reduce entry thrust
• 6.625-inch spiral flute length at a 4xD ratio for efficient chip evacuation
• Right-hand cutting, regular spiral, ANSI-conforming Series 209 geometry

Compatibility

Designed for use in drill presses, lathes, and milling machines equipped with a 3MT (Morse Taper No. 3) spindle socket or compatible adapter sleeve.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician. Power down and lock out the machine before seating or removing the taper shank. Clean the spindle bore and taper shank surfaces before insertion to ensure full contact and prevent slippage under load. Do not exceed the machine's rated spindle speed for the bit diameter; consult published surface footage charts for high speed steel in the workpiece material being drilled.