Precision Twist Drill 5999474 Taper Shank Drill Bit

Product Description

The PRECISION TWIST DRILL 5999474 is a taper shank drill bit designed for drilling large-diameter holes in metal, wood, and other materials requiring a rigid, high-torque setup. Built from high speed steel with an oxide finish, this bit measures 1.3438 inches (1-11/32 inches) in diameter and features a 4MT (Morse Taper 4) shank for direct mounting in compatible taper-socket spindles and drill press quills. The 118-degree standard point with web thinning reduces entry thrust and improves centering. A right-hand spiral flute configuration handles chip evacuation efficiently during heavy-duty boring operations. This bit is a general-purpose, shop-grade tool suitable for production and maintenance drilling environments.

This bit is suited for use in drill presses, lathes, and milling machines equipped with a No. 4 Morse Taper socket. The 8.75-inch flute length supports deep-hole drilling applications where chip clearance is critical. Its general-purpose performance rating makes it appropriate for job-shop and maintenance machining work, including fabrication, structural steel work, and mechanical repair operations. No coolant-through capability is present, so external coolant or cutting fluid application is recommended when drilling harder materials at extended depths.

Key Features

• 1.3438-inch (1-11/32-inch) drill diameter for large-bore applications
• No. 4 Morse Taper (4MT) shank for rigid, self-locking spindle engagement
• High speed steel construction with oxide finish for heat and wear resistance
• 118-degree standard point with web thinning to reduce entry thrust
• Right-hand regular spiral flute for efficient chip removal
• ANSI-standard Series 209 - consistent geometry for predictable results

Compatibility

Designed for use in drill presses, lathes, and machining equipment fitted with a No. 4 Morse Taper spindle socket. Conforms to ANSI standards for taper shank drill bit geometry.

Installation Notes

Installation requires a No. 4 Morse Taper-compatible spindle or drill socket; use a proper drift key and drift slot to seat and remove the shank safely - never hammer the cutting end. Power down and lock out the machine before inserting or removing the bit. Apply cutting fluid or external coolant when drilling ferrous materials to manage heat buildup, as this bit does not have coolant-through capability.